From patchwork Thu Aug 4 09:50:27 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 9263211 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E6D1A6048F for ; Thu, 4 Aug 2016 09:52:30 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D102B28335 for ; Thu, 4 Aug 2016 09:52:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C3F3428395; Thu, 4 Aug 2016 09:52:30 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A909228389 for ; Thu, 4 Aug 2016 09:52:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754201AbcHDJwS (ORCPT ); Thu, 4 Aug 2016 05:52:18 -0400 Received: from mail-wm0-f65.google.com ([74.125.82.65]:36490 "EHLO mail-wm0-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752337AbcHDJwA (ORCPT ); Thu, 4 Aug 2016 05:52:00 -0400 Received: by mail-wm0-f65.google.com with SMTP id x83so42239895wma.3 for ; Thu, 04 Aug 2016 02:50:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:content-transfer-encoding:in-reply-to :user-agent; bh=ue9MfSoc6lOgEOTbNqfl4BrhBNVCpgIEzSik+QJk7fg=; b=F1IdrenviFlXcAZPmS72xrP34hsqsNojdB/jGSDYxyXocvGwXLQVBA47hSBDSxNEaq gI0CEQI8736ukJN9ABpG2MxVPp+814b4aVl7BB5utDkT7wdihKZkoAiYuLb0BmK4HWlA olxK+8xkpOFLhHx26pyaWIRZUBE8uqAm52fLs= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition :content-transfer-encoding:in-reply-to:user-agent; bh=ue9MfSoc6lOgEOTbNqfl4BrhBNVCpgIEzSik+QJk7fg=; b=e91OwQYjx9KKZ5IDOUrpzPNvEL0cq5j1fvdWibHQqsTj/HFpP3e7hq/zY+Kv5WdbQv zd4nmmR+Pk/c3VAIp9KtXox0FPDSPiQU8e6ck+kKSjysEw0rbsvz8pgBWW4oVQ7lkq4v HS/vPIPEaob6wMoHiZM6HSV6uRDcuQrSvAZC2VpFyQEUQkkzhLqhNED0fze58xkShhQQ 4GfS+GFG1NnRP+ThuWe8k+dMlCu9UOSYDseUFlX2jXxQ1x6rkgroGRTItm4vd9ojt17D V6fD5wMw9Ip15t+k8YRY0ybpDdgmCvdtWZeeyOMgVsnuwi5hiZO7YrG0qW/dQj77Fjbi UHcg== X-Gm-Message-State: AEkooutEuwCbmqSfWCH05OHnfE1jLvPlv+Iukzvcou2FFBWch9pbu84Ss7+nSjpGKZPNgw== X-Received: by 10.28.13.143 with SMTP id 137mr21506569wmn.46.1470304231900; Thu, 04 Aug 2016 02:50:31 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:56b5:0:ac27:b86c:7764:9429]) by smtp.gmail.com with ESMTPSA id bc10sm11974108wjc.32.2016.08.04.02.50.29 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 04 Aug 2016 02:50:30 -0700 (PDT) Date: Thu, 4 Aug 2016 11:50:27 +0200 From: Daniel Vetter To: Jani Nikula Cc: Daniel Vetter , Chris Wilson , Milo Kim , Krzysztof Kozlowski , David Airlie , nouveau@lists.freedesktop.org, Jon Nettleton , Nicolas Ferre , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, Thierry Reding , Paul Mackerras , Laurent Pinchart , Daniel Vetter , Lee Jones , Daniel Drake , Jens Frederich , linux-acpi@vger.kernel.org, Bruno =?iso-8859-1?Q?Pr=E9mont?= , Tomi Valkeinen , Ben Skeggs , Zhang Rui , Jean-Christophe Plagniol-Villard , Michael Hennerich , intel-gfx@lists.freedesktop.org, Jiri Kosina , linux-omap@vger.kernel.org, Thomas Petazzoni , Jingoo Han , linux-renesas-soc@vger.kernel.org, Noralf =?iso-8859-1?Q?Tr=F8nnes?= , Kukjin Kim , Alex Deucher , Antonino Daplas , Christian =?iso-8859-1?Q?K=F6nig?= Subject: Re: [Intel-gfx] [PATCH] backlight: Avoid double fbcon backlight handling Message-ID: <20160804095027.GB6232@phenom.ffwll.local> References: <1467286256-8870-1-git-send-email-chris@chris-wilson.co.uk> <20160712122119.GR23520@phenom.ffwll.local> <87a8gsq540.fsf@intel.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <87a8gsq540.fsf@intel.com> X-Operating-System: Linux phenom 4.6.0-1-amd64 User-Agent: Mutt/1.6.0 (2016-04-01) Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On Thu, Aug 04, 2016 at 12:02:23PM +0300, Jani Nikula wrote: > On Tue, 12 Jul 2016, Daniel Vetter wrote: > > On Thu, Jun 30, 2016 at 12:30:56PM +0100, Chris Wilson wrote: > >> Backlights controlled by i915.ko and only associated with its connectors > >> and also only associated with the intel_drmfb fbcon, controlled by > >> i915.ko. In this situation, we already handle adjusting the backlight > >> when the fbcon is blanked/unblanked and do not require backlight trying > >> to do the same. > >> > >> Attempting to register with the fbdev as a client causes lockdep to warn > >> about a dependency cycle: > > > > The fbdev notifier strikes again! > > > > Last time I looked into this I think the proper solution would be to split > > the backlight part from the other fbdev notifier (which is used by fbcon > > for reacting to fbdev device reg/unreg events). > > > > I think that would fix this too, with the added bonus of slightly > > untangling the fbcon locking mess. And it's also the one part of > > untangling this mess which should be possible without any trouble - I've > > simply never done it since entirely getting rid of the fbdev notifier for > > fbcon is a lot more work. > > So what do we do with this? It fixes a problem upstream. There's no > Fixes: to identify the bad commit. Any idea on that? It's either this or > we dig out the bad commit (Chris probably knows which one?) and revert. The real trouble is the drm_for_each_connector in drm_connector_register_all(). This introduced the new depency. The proper fix imo is to fix up the connector_list locking, but for 4.8 we could do the same hack+comment like we do in unregister_all. It's not the only place that's broken anyway, and much less invasive than this here. If someone confirms I'll bake it into a real patch. -Daniel > > BR, > Jani. > > > > -Daniel > > > >> > >> [ 18.983763] ====================================================== > >> [ 18.983763] [ INFO: possible circular locking dependency detected ] > >> [ 18.983766] 4.7.0-rc5+ #524 Tainted: G O > >> [ 18.983767] ------------------------------------------------------- > >> [ 18.983767] kworker/u8:0/6 is trying to acquire lock: > >> [ 18.983777] (&dev->mode_config.mutex){+.+.+.}, at: [] drm_modeset_lock_all+0x40/0x120 > >> [ 18.983777] > >> but task is already holding lock: > >> [ 18.983782] ((fb_notifier_list).rwsem){++++.+}, at: [] __blocking_notifier_call_chain+0x35/0x70 > >> [ 18.983783] > >> which lock already depends on the new lock. > >> > >> [ 18.983783] > >> the existing dependency chain (in reverse order) is: > >> [ 18.983785] > >> -> #1 ((fb_notifier_list).rwsem){++++.+}: > >> [ 18.983789] [] lock_acquire+0xb1/0x200 > >> [ 18.983792] [] down_write+0x44/0x80 > >> [ 18.983795] [] blocking_notifier_chain_register+0x21/0xb0 > >> [ 18.983798] [] fb_register_client+0x18/0x20 > >> [ 18.983800] [] backlight_device_register+0x136/0x260 > >> [ 18.983852] [] intel_backlight_device_register+0xa2/0x160 [i915] > >> [ 18.983892] [] intel_connector_register+0xe/0x10 [i915] > >> [ 18.983932] [] intel_dp_connector_register+0x1b/0x80 [i915] > >> [ 18.983936] [] drm_connector_register+0x4a/0x80 > >> [ 18.983938] [] drm_connector_register_all+0x64/0xf0 > >> [ 18.983940] [] drm_modeset_register_all+0x174/0x1c0 > >> [ 18.983942] [] drm_dev_register+0xc2/0xd0 > >> [ 18.983976] [] i915_driver_load+0x1547/0x2200 [i915] > >> [ 18.984010] [] i915_pci_probe+0x4f/0x70 [i915] > >> [ 18.984014] [] local_pci_probe+0x45/0xa0 > >> [ 18.984015] [] pci_device_probe+0xdb/0x130 > >> [ 18.984018] [] driver_probe_device+0x223/0x440 > >> [ 18.984020] [] __driver_attach+0xd5/0x100 > >> [ 18.984022] [] bus_for_each_dev+0x66/0xa0 > >> [ 18.984023] [] driver_attach+0x1e/0x20 > >> [ 18.984025] [] bus_add_driver+0x1ee/0x280 > >> [ 18.984028] [] driver_register+0x60/0xe0 > >> [ 18.984030] [] __pci_register_driver+0x60/0x70 > >> [ 18.984063] [] i915_init+0x5b/0x62 [i915] > >> [ 18.984067] [] do_one_initcall+0x3d/0x150 > >> [ 18.984070] [] do_init_module+0x5f/0x1d9 > >> [ 18.984073] [] load_module+0x20e6/0x27e0 > >> [ 18.984075] [] SYSC_finit_module+0xc3/0xf0 > >> [ 18.984076] [] SyS_finit_module+0xe/0x10 > >> [ 18.984079] [] entry_SYSCALL_64_fastpath+0x1c/0xac > >> [ 18.984081] > >> -> #0 (&dev->mode_config.mutex){+.+.+.}: > >> [ 18.984083] [] __lock_acquire+0x10fc/0x1260 > >> [ 18.984085] [] lock_acquire+0xb1/0x200 > >> [ 18.984088] [] mutex_lock_nested+0x67/0x3c0 > >> [ 18.984090] [] drm_modeset_lock_all+0x40/0x120 > >> [ 18.984093] [] drm_fb_helper_restore_fbdev_mode_unlocked+0x2b/0x80 > >> [ 18.984095] [] drm_fb_helper_set_par+0x2d/0x50 > >> [ 18.984134] [] intel_fbdev_set_par+0x1a/0x60 [i915] > >> [ 18.984136] [] fbcon_init+0x586/0x610 > >> [ 18.984139] [] visual_init+0xca/0x130 > >> [ 18.984141] [] do_bind_con_driver+0x1c1/0x3a0 > >> [ 18.984143] [] do_take_over_console+0x116/0x180 > >> [ 18.984145] [] do_fbcon_takeover+0x57/0xb0 > >> [ 18.984147] [] fbcon_event_notify+0x658/0x750 > >> [ 18.984150] [] notifier_call_chain+0x3e/0xb0 > >> [ 18.984152] [] __blocking_notifier_call_chain+0x4d/0x70 > >> [ 18.984154] [] blocking_notifier_call_chain+0x16/0x20 > >> [ 18.984156] [] fb_notifier_call_chain+0x1b/0x20 > >> [ 18.984158] [] register_framebuffer+0x251/0x330 > >> [ 18.984160] [] drm_fb_helper_initial_config+0x25f/0x3f0 > >> [ 18.984199] [] intel_fbdev_initial_config+0x18/0x30 [i915] > >> [ 18.984201] [] async_run_entry_fn+0x48/0x150 > >> [ 18.984203] [] process_one_work+0x1e7/0x750 > >> [ 18.984205] [] worker_thread+0x4b/0x4f0 > >> [ 18.984207] [] kthread+0xef/0x110 > >> [ 18.984208] [] ret_from_fork+0x1f/0x40 > >> [ 18.984209] > >> other info that might help us debug this: > >> > >> [ 18.984210] Possible unsafe locking scenario: > >> > >> [ 18.984210] CPU0 CPU1 > >> [ 18.984211] ---- ---- > >> [ 18.984212] lock((fb_notifier_list).rwsem); > >> [ 18.984213] lock(&dev->mode_config.mutex); > >> [ 18.984215] lock((fb_notifier_list).rwsem); > >> [ 18.984216] lock(&dev->mode_config.mutex); > >> [ 18.984216] > >> *** DEADLOCK *** > >> > >> [ 18.984217] 6 locks held by kworker/u8:0/6: > >> [ 18.984220] #0: ("events_unbound"){.+.+.+}, at: [] process_one_work+0x169/0x750 > >> [ 18.984223] #1: ((&entry->work)){+.+.+.}, at: [] process_one_work+0x169/0x750 > >> [ 18.984227] #2: (registration_lock){+.+.+.}, at: [] register_framebuffer+0x27/0x330 > >> [ 18.984231] #3: (console_lock){+.+.+.}, at: [] register_framebuffer+0x26e/0x330 > >> [ 18.984234] #4: (&fb_info->lock){+.+.+.}, at: [] lock_fb_info+0x1d/0x40 > >> [ 18.984238] #5: ((fb_notifier_list).rwsem){++++.+}, at: [] __blocking_notifier_call_chain+0x35/0x70 > >> [ 18.984238] > >> stack backtrace: > >> [ 18.984241] CPU: 2 PID: 6 Comm: kworker/u8:0 Tainted: G O 4.7.0-rc5+ #524 > >> [ 18.984242] Hardware name: Intel Corp. Broxton P/NOTEBOOK, BIOS APLKRVPA.X64.0138.B33.1606250842 06/25/2016 > >> [ 18.984244] Workqueue: events_unbound async_run_entry_fn > >> [ 18.984248] 0000000000000000 ffff8800758577f0 ffffffff814507a5 ffffffff828b9900 > >> [ 18.984250] ffffffff828b9900 ffff880075857830 ffffffff810dc6fa ffff880075857880 > >> [ 18.984252] ffff88007584d688 0000000000000005 0000000000000006 ffff88007584d6b0 > >> [ 18.984253] Call Trace: > >> [ 18.984257] [] dump_stack+0x67/0x92 > >> [ 18.984259] [] print_circular_bug+0x1aa/0x200 > >> [ 18.984261] [] __lock_acquire+0x10fc/0x1260 > >> [ 18.984264] [] lock_acquire+0xb1/0x200 > >> [ 18.984266] [] ? drm_modeset_lock_all+0x40/0x120 > >> [ 18.984267] [] ? drm_modeset_lock_all+0x40/0x120 > >> [ 18.984269] [] mutex_lock_nested+0x67/0x3c0 > >> [ 18.984271] [] ? drm_modeset_lock_all+0x40/0x120 > >> [ 18.984273] [] ? rcu_read_lock_sched_held+0x7f/0x90 > >> [ 18.984276] [] ? kmem_cache_alloc_trace+0x248/0x2b0 > >> [ 18.984277] [] ? drm_modeset_lock_all+0x25/0x120 > >> [ 18.984279] [] drm_modeset_lock_all+0x40/0x120 > >> [ 18.984281] [] drm_fb_helper_restore_fbdev_mode_unlocked+0x2b/0x80 > >> [ 18.984283] [] drm_fb_helper_set_par+0x2d/0x50 > >> [ 18.984322] [] intel_fbdev_set_par+0x1a/0x60 [i915] > >> [ 18.984324] [] fbcon_init+0x586/0x610 > >> [ 18.984326] [] visual_init+0xca/0x130 > >> [ 18.984328] [] do_bind_con_driver+0x1c1/0x3a0 > >> [ 18.984330] [] do_take_over_console+0x116/0x180 > >> [ 18.984332] [] do_fbcon_takeover+0x57/0xb0 > >> [ 18.984334] [] fbcon_event_notify+0x658/0x750 > >> [ 18.984336] [] notifier_call_chain+0x3e/0xb0 > >> [ 18.984338] [] __blocking_notifier_call_chain+0x4d/0x70 > >> [ 18.984340] [] blocking_notifier_call_chain+0x16/0x20 > >> [ 18.984342] [] fb_notifier_call_chain+0x1b/0x20 > >> [ 18.984344] [] register_framebuffer+0x251/0x330 > >> [ 18.984347] [] ? vga_switcheroo_client_fb_set+0x5d/0x70 > >> [ 18.984349] [] drm_fb_helper_initial_config+0x25f/0x3f0 > >> [ 18.984388] [] intel_fbdev_initial_config+0x18/0x30 [i915] > >> [ 18.984389] [] async_run_entry_fn+0x48/0x150 > >> [ 18.984391] [] process_one_work+0x1e7/0x750 > >> [ 18.984392] [] ? process_one_work+0x169/0x750 > >> [ 18.984394] [] worker_thread+0x4b/0x4f0 > >> [ 18.984396] [] ? process_one_work+0x750/0x750 > >> [ 18.984398] [] kthread+0xef/0x110 > >> [ 18.984401] [] ret_from_fork+0x1f/0x40 > >> [ 18.984402] [] ? kthread_stop+0x2e0/0x2e0 > >> > >> Reported-by: Imre Deak > >> Signed-off-by: Chris Wilson > >> Cc: Imre Deak > >> Cc: Zhang Rui > >> Cc: Alex Deucher > >> Cc: "Christian König" > >> Cc: David Airlie > >> Cc: Patrik Jakobsson > >> Cc: Daniel Vetter > >> Cc: Jani Nikula > >> Cc: Ben Skeggs > >> Cc: Tomi Valkeinen > >> Cc: Laurent Pinchart > >> Cc: "Bruno Prémont" > >> Cc: Jiri Kosina > >> Cc: Thomas Petazzoni > >> Cc: "Noralf Trønnes" > >> Cc: Jens Frederich > >> Cc: Daniel Drake > >> Cc: Jon Nettleton > >> Cc: Jingoo Han > >> Cc: Lee Jones > >> Cc: Jean-Christophe Plagniol-Villard > >> Cc: Michael Hennerich > >> Cc: Milo Kim > >> Cc: Thierry Reding > >> Cc: Nicolas Ferre > >> Cc: Paul Mackerras > >> Cc: Kukjin Kim > >> Cc: Krzysztof Kozlowski > >> Cc: Antonino Daplas > >> Cc: linux-acpi@vger.kernel.org > >> Cc: dri-devel@lists.freedesktop.org > >> Cc: intel-gfx@lists.freedesktop.org > >> Cc: nouveau@lists.freedesktop.org > >> Cc: linux-renesas-soc@vger.kernel.org > >> Cc: linux-fbdev@vger.kernel.org > >> Cc: linux-omap@vger.kernel.org > >> --- > >> drivers/acpi/acpi_video.c | 3 ++- > >> drivers/gpu/drm/amd/amdgpu/atombios_encoders.c | 3 ++- > >> drivers/gpu/drm/bridge/parade-ps8622.c | 3 ++- > >> drivers/gpu/drm/gma500/cdv_device.c | 3 ++- > >> drivers/gpu/drm/gma500/mdfld_device.c | 3 ++- > >> drivers/gpu/drm/gma500/oaktrail_device.c | 3 ++- > >> drivers/gpu/drm/gma500/psb_device.c | 3 ++- > >> drivers/gpu/drm/i915/intel_panel.c | 3 ++- > >> drivers/gpu/drm/nouveau/nouveau_backlight.c | 6 ++++-- > >> drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 3 ++- > >> .../gpu/drm/omapdrm/displays/panel-sony-acx565akm.c | 3 ++- > >> drivers/gpu/drm/radeon/atombios_encoders.c | 3 ++- > >> drivers/gpu/drm/radeon/radeon_legacy_encoders.c | 3 ++- > >> drivers/gpu/drm/shmobile/shmob_drm_backlight.c | 3 ++- > >> drivers/hid/hid-picolcd_backlight.c | 3 ++- > >> drivers/macintosh/via-pmu-backlight.c | 3 ++- > >> drivers/platform/x86/acer-wmi.c | 3 ++- > >> drivers/platform/x86/apple-gmux.c | 3 ++- > >> drivers/platform/x86/asus-laptop.c | 3 ++- > >> drivers/platform/x86/asus-wmi.c | 3 ++- > >> drivers/platform/x86/classmate-laptop.c | 3 ++- > >> drivers/platform/x86/compal-laptop.c | 3 ++- > >> drivers/platform/x86/dell-laptop.c | 3 ++- > >> drivers/platform/x86/eeepc-laptop.c | 3 ++- > >> drivers/platform/x86/fujitsu-laptop.c | 3 ++- > >> drivers/platform/x86/ideapad-laptop.c | 3 ++- > >> drivers/platform/x86/intel_oaktrail.c | 3 ++- > >> drivers/platform/x86/msi-laptop.c | 3 ++- > >> drivers/platform/x86/msi-wmi.c | 3 ++- > >> drivers/platform/x86/panasonic-laptop.c | 3 ++- > >> drivers/platform/x86/samsung-laptop.c | 3 ++- > >> drivers/platform/x86/samsung-q10.c | 3 ++- > >> drivers/platform/x86/sony-laptop.c | 3 ++- > >> drivers/platform/x86/thinkpad_acpi.c | 3 ++- > >> drivers/platform/x86/toshiba_acpi.c | 3 ++- > >> drivers/staging/fbtft/fb_ssd1351.c | 3 ++- > >> drivers/staging/fbtft/fb_watterott.c | 3 ++- > >> drivers/staging/fbtft/fbtft-core.c | 3 ++- > >> drivers/staging/olpc_dcon/olpc_dcon.c | 3 ++- > >> drivers/usb/misc/appledisplay.c | 3 ++- > >> drivers/video/backlight/88pm860x_bl.c | 3 ++- > >> drivers/video/backlight/aat2870_bl.c | 3 ++- > >> drivers/video/backlight/adp5520_bl.c | 3 ++- > >> drivers/video/backlight/adp8860_bl.c | 3 ++- > >> drivers/video/backlight/adp8870_bl.c | 3 ++- > >> drivers/video/backlight/ams369fg06.c | 3 ++- > >> drivers/video/backlight/apple_bl.c | 3 ++- > >> drivers/video/backlight/as3711_bl.c | 3 ++- > >> drivers/video/backlight/backlight.c | 20 +++++++++++++------- > >> drivers/video/backlight/bd6107.c | 3 ++- > >> drivers/video/backlight/corgi_lcd.c | 3 ++- > >> drivers/video/backlight/cr_bllcd.c | 3 ++- > >> drivers/video/backlight/da903x_bl.c | 3 ++- > >> drivers/video/backlight/da9052_bl.c | 3 ++- > >> drivers/video/backlight/ep93xx_bl.c | 3 ++- > >> drivers/video/backlight/generic_bl.c | 3 ++- > >> drivers/video/backlight/gpio_backlight.c | 3 ++- > >> drivers/video/backlight/hp680_bl.c | 3 ++- > >> drivers/video/backlight/ipaq_micro_bl.c | 3 ++- > >> drivers/video/backlight/jornada720_bl.c | 3 ++- > >> drivers/video/backlight/kb3886_bl.c | 3 ++- > >> drivers/video/backlight/ld9040.c | 3 ++- > >> drivers/video/backlight/lm3533_bl.c | 3 ++- > >> drivers/video/backlight/lm3630a_bl.c | 6 ++++-- > >> drivers/video/backlight/lm3639_bl.c | 3 ++- > >> drivers/video/backlight/locomolcd.c | 3 ++- > >> drivers/video/backlight/lp855x_bl.c | 3 ++- > >> drivers/video/backlight/lp8788_bl.c | 3 ++- > >> drivers/video/backlight/lv5207lp.c | 3 ++- > >> drivers/video/backlight/max8925_bl.c | 3 ++- > >> drivers/video/backlight/omap1_bl.c | 3 ++- > >> drivers/video/backlight/ot200_bl.c | 3 ++- > >> drivers/video/backlight/pandora_bl.c | 3 ++- > >> drivers/video/backlight/pcf50633-backlight.c | 3 ++- > >> drivers/video/backlight/pm8941-wled.c | 3 ++- > >> drivers/video/backlight/pwm_bl.c | 3 ++- > >> drivers/video/backlight/s6e63m0.c | 3 ++- > >> drivers/video/backlight/sky81452-backlight.c | 3 ++- > >> drivers/video/backlight/tosa_bl.c | 3 ++- > >> drivers/video/backlight/tps65217_bl.c | 3 ++- > >> drivers/video/backlight/wm831x_bl.c | 3 ++- > >> drivers/video/fbdev/atmel_lcdfb.c | 3 ++- > >> drivers/video/fbdev/aty/aty128fb.c | 3 ++- > >> drivers/video/fbdev/aty/atyfb_base.c | 3 ++- > >> drivers/video/fbdev/aty/radeon_backlight.c | 3 ++- > >> drivers/video/fbdev/bf537-lq035.c | 3 ++- > >> drivers/video/fbdev/bf54x-lq043fb.c | 3 ++- > >> drivers/video/fbdev/bfin-t350mcqb-fb.c | 3 ++- > >> drivers/video/fbdev/exynos/s6e8ax0.c | 3 ++- > >> drivers/video/fbdev/mx3fb.c | 3 ++- > >> drivers/video/fbdev/nvidia/nv_backlight.c | 3 ++- > >> .../video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c | 3 ++- > >> .../omap2/omapfb/displays/panel-sony-acx565akm.c | 3 ++- > >> drivers/video/fbdev/riva/fbdev.c | 3 ++- > >> drivers/video/fbdev/sh_mobile_lcdcfb.c | 3 ++- > >> drivers/video/fbdev/ssd1307fb.c | 3 ++- > >> include/linux/backlight.h | 7 +++++-- > >> 97 files changed, 212 insertions(+), 106 deletions(-) > >> > >> diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c > >> index c1d138e128cb..49e0acb70c17 100644 > >> --- a/drivers/acpi/acpi_video.c > >> +++ b/drivers/acpi/acpi_video.c > >> @@ -1693,7 +1693,8 @@ static void acpi_video_dev_register_backlight(struct acpi_video_device *device) > >> parent, > >> device, > >> &acpi_backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> kfree(name); > >> if (IS_ERR(device->backlight)) { > >> device->backlight = NULL; > >> diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c > >> index 48b6bd671cda..b6ae67a75a25 100644 > >> --- a/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c > >> +++ b/drivers/gpu/drm/amd/amdgpu/atombios_encoders.c > >> @@ -198,7 +198,8 @@ void amdgpu_atombios_encoder_init_backlight(struct amdgpu_encoder *amdgpu_encode > >> snprintf(bl_name, sizeof(bl_name), > >> "amdgpu_bl%d", dev->primary->index); > >> bd = backlight_device_register(bl_name, drm_connector->kdev, > >> - pdata, &amdgpu_atombios_encoder_backlight_ops, &props); > >> + pdata, &amdgpu_atombios_encoder_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> DRM_ERROR("Backlight registration failed\n"); > >> goto error; > >> diff --git a/drivers/gpu/drm/bridge/parade-ps8622.c b/drivers/gpu/drm/bridge/parade-ps8622.c > >> index 5cd8dd7e5904..14dea711b474 100644 > >> --- a/drivers/gpu/drm/bridge/parade-ps8622.c > >> +++ b/drivers/gpu/drm/bridge/parade-ps8622.c > >> @@ -608,7 +608,8 @@ static int ps8622_probe(struct i2c_client *client, > >> if (!of_find_property(dev->of_node, "use-external-pwm", NULL)) { > >> ps8622->bl = backlight_device_register("ps8622-backlight", > >> dev, ps8622, &ps8622_backlight_ops, > >> - NULL); > >> + NULL, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(ps8622->bl)) { > >> DRM_ERROR("failed to register backlight\n"); > >> ret = PTR_ERR(ps8622->bl); > >> diff --git a/drivers/gpu/drm/gma500/cdv_device.c b/drivers/gpu/drm/gma500/cdv_device.c > >> index 8745971a7680..d2b4d645b4db 100644 > >> --- a/drivers/gpu/drm/gma500/cdv_device.c > >> +++ b/drivers/gpu/drm/gma500/cdv_device.c > >> @@ -163,7 +163,8 @@ static int cdv_backlight_init(struct drm_device *dev) > >> props.type = BACKLIGHT_PLATFORM; > >> > >> cdv_backlight_device = backlight_device_register("psb-bl", > >> - NULL, (void *)dev, &cdv_ops, &props); > >> + NULL, (void *)dev, &cdv_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(cdv_backlight_device)) > >> return PTR_ERR(cdv_backlight_device); > >> > >> diff --git a/drivers/gpu/drm/gma500/mdfld_device.c b/drivers/gpu/drm/gma500/mdfld_device.c > >> index e2ab858122f9..2e24ecccfd39 100644 > >> --- a/drivers/gpu/drm/gma500/mdfld_device.c > >> +++ b/drivers/gpu/drm/gma500/mdfld_device.c > >> @@ -130,7 +130,8 @@ static int mdfld_backlight_init(struct drm_device *dev) > >> props.max_brightness = BRIGHTNESS_MAX_LEVEL; > >> props.type = BACKLIGHT_PLATFORM; > >> mdfld_backlight_device = backlight_device_register("mdfld-bl", > >> - NULL, (void *)dev, &mdfld_ops, &props); > >> + NULL, (void *)dev, &mdfld_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(mdfld_backlight_device)) > >> return PTR_ERR(mdfld_backlight_device); > >> diff --git a/drivers/gpu/drm/gma500/oaktrail_device.c b/drivers/gpu/drm/gma500/oaktrail_device.c > >> index ba30b43a3412..034553a524ac 100644 > >> --- a/drivers/gpu/drm/gma500/oaktrail_device.c > >> +++ b/drivers/gpu/drm/gma500/oaktrail_device.c > >> @@ -155,7 +155,8 @@ static int oaktrail_backlight_init(struct drm_device *dev) > >> props.type = BACKLIGHT_PLATFORM; > >> > >> oaktrail_backlight_device = backlight_device_register("oaktrail-bl", > >> - NULL, (void *)dev, &oaktrail_ops, &props); > >> + NULL, (void *)dev, &oaktrail_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(oaktrail_backlight_device)) > >> return PTR_ERR(oaktrail_backlight_device); > >> diff --git a/drivers/gpu/drm/gma500/psb_device.c b/drivers/gpu/drm/gma500/psb_device.c > >> index dc0f8527570c..0c1385d64839 100644 > >> --- a/drivers/gpu/drm/gma500/psb_device.c > >> +++ b/drivers/gpu/drm/gma500/psb_device.c > >> @@ -131,7 +131,8 @@ static int psb_backlight_init(struct drm_device *dev) > >> props.type = BACKLIGHT_PLATFORM; > >> > >> psb_backlight_device = backlight_device_register("psb-bl", > >> - NULL, (void *)dev, &psb_ops, &props); > >> + NULL, (void *)dev, &psb_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(psb_backlight_device)) > >> return PTR_ERR(psb_backlight_device); > >> > >> diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c > >> index 3c0b97f0bfae..acf6395b9f33 100644 > >> --- a/drivers/gpu/drm/i915/intel_panel.c > >> +++ b/drivers/gpu/drm/i915/intel_panel.c > >> @@ -1201,7 +1201,8 @@ int intel_backlight_device_register(struct intel_connector *connector) > >> backlight_device_register("intel_backlight", > >> connector->base.kdev, > >> connector, > >> - &intel_backlight_device_ops, &props); > >> + &intel_backlight_device_ops, &props, > >> + 0); > >> > >> if (IS_ERR(panel->backlight.device)) { > >> DRM_ERROR("Failed to register backlight: %ld\n", > >> diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c > >> index f5101be806cb..5fd7e7498f13 100644 > >> --- a/drivers/gpu/drm/nouveau/nouveau_backlight.c > >> +++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c > >> @@ -82,7 +82,8 @@ nv40_backlight_init(struct drm_connector *connector) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = 31; > >> bd = backlight_device_register("nv_backlight", connector->kdev, drm, > >> - &nv40_bl_ops, &props); > >> + &nv40_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> drm->backlight = bd; > >> @@ -204,7 +205,8 @@ nv50_backlight_init(struct drm_connector *connector) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = 100; > >> bd = backlight_device_register("nv_backlight", connector->kdev, > >> - nv_encoder, ops, &props); > >> + nv_encoder, ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c > >> index 1b0cf2d8224b..10511bdd9936 100644 > >> --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c > >> +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c > >> @@ -1260,7 +1260,8 @@ static int dsicm_probe(struct platform_device *pdev) > >> > >> props.type = BACKLIGHT_RAW; > >> bldev = backlight_device_register(dev_name(dev), > >> - dev, ddata, &dsicm_bl_ops, &props); > >> + dev, ddata, &dsicm_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bldev)) { > >> r = PTR_ERR(bldev); > >> goto err_bl; > >> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c b/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c > >> index 157c512205d1..9f3622910511 100644 > >> --- a/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c > >> +++ b/drivers/gpu/drm/omapdrm/displays/panel-sony-acx565akm.c > >> @@ -817,7 +817,8 @@ static int acx565akm_probe(struct spi_device *spi) > >> props.type = BACKLIGHT_RAW; > >> > >> bldev = backlight_device_register("acx565akm", &ddata->spi->dev, > >> - ddata, &acx565akm_bl_ops, &props); > >> + ddata, &acx565akm_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bldev)) { > >> r = PTR_ERR(bldev); > >> goto err_reg_bl; > >> diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c > >> index 587cae4e73c9..3676ba6e16ee 100644 > >> --- a/drivers/gpu/drm/radeon/atombios_encoders.c > >> +++ b/drivers/gpu/drm/radeon/atombios_encoders.c > >> @@ -214,7 +214,8 @@ void radeon_atom_backlight_init(struct radeon_encoder *radeon_encoder, > >> snprintf(bl_name, sizeof(bl_name), > >> "radeon_bl%d", dev->primary->index); > >> bd = backlight_device_register(bl_name, drm_connector->kdev, > >> - pdata, &radeon_atom_backlight_ops, &props); > >> + pdata, &radeon_atom_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> DRM_ERROR("Backlight registration failed\n"); > >> goto error; > >> diff --git a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c > >> index 868c3ba2efaa..27908624c818 100644 > >> --- a/drivers/gpu/drm/radeon/radeon_legacy_encoders.c > >> +++ b/drivers/gpu/drm/radeon/radeon_legacy_encoders.c > >> @@ -393,7 +393,8 @@ void radeon_legacy_backlight_init(struct radeon_encoder *radeon_encoder, > >> snprintf(bl_name, sizeof(bl_name), > >> "radeon_bl%d", dev->primary->index); > >> bd = backlight_device_register(bl_name, drm_connector->kdev, > >> - pdata, &radeon_backlight_ops, &props); > >> + pdata, &radeon_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> DRM_ERROR("Backlight registration failed\n"); > >> goto error; > >> diff --git a/drivers/gpu/drm/shmobile/shmob_drm_backlight.c b/drivers/gpu/drm/shmobile/shmob_drm_backlight.c > >> index 33dd41afea0e..1ff10faed3a7 100644 > >> --- a/drivers/gpu/drm/shmobile/shmob_drm_backlight.c > >> +++ b/drivers/gpu/drm/shmobile/shmob_drm_backlight.c > >> @@ -68,7 +68,8 @@ int shmob_drm_backlight_init(struct shmob_drm_connector *scon) > >> return 0; > >> > >> backlight = backlight_device_register(bdata->name, dev->dev, scon, > >> - &shmob_drm_backlight_ops, NULL); > >> + &shmob_drm_backlight_ops, NULL, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(backlight)) { > >> dev_err(dev->dev, "unable to register backlight device: %ld\n", > >> PTR_ERR(backlight)); > >> diff --git a/drivers/hid/hid-picolcd_backlight.c b/drivers/hid/hid-picolcd_backlight.c > >> index 808807ad388f..06597f50c32b 100644 > >> --- a/drivers/hid/hid-picolcd_backlight.c > >> +++ b/drivers/hid/hid-picolcd_backlight.c > >> @@ -77,7 +77,8 @@ int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = 0xff; > >> bdev = backlight_device_register(dev_name(dev), dev, data, > >> - &picolcd_blops, &props); > >> + &picolcd_blops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bdev)) { > >> dev_err(dev, "failed to register backlight\n"); > >> return PTR_ERR(bdev); > >> diff --git a/drivers/macintosh/via-pmu-backlight.c b/drivers/macintosh/via-pmu-backlight.c > >> index 6f68537c93ce..da0fb2e87f75 100644 > >> --- a/drivers/macintosh/via-pmu-backlight.c > >> +++ b/drivers/macintosh/via-pmu-backlight.c > >> @@ -160,7 +160,8 @@ void __init pmu_backlight_init() > >> props.type = BACKLIGHT_PLATFORM; > >> props.max_brightness = FB_BACKLIGHT_LEVELS - 1; > >> bd = backlight_device_register(name, NULL, NULL, &pmu_backlight_data, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> printk(KERN_ERR "PMU Backlight registration failed\n"); > >> return; > >> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c > >> index 79d64ea00bfb..0b17c5146175 100644 > >> --- a/drivers/platform/x86/acer-wmi.c > >> +++ b/drivers/platform/x86/acer-wmi.c > >> @@ -1419,7 +1419,8 @@ static int acer_backlight_init(struct device *dev) > >> props.type = BACKLIGHT_PLATFORM; > >> props.max_brightness = max_brightness; > >> bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> pr_err("Could not register Acer backlight device\n"); > >> acer_backlight_device = NULL; > >> diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c > >> index 4034d2d4c507..e041bbe14df5 100644 > >> --- a/drivers/platform/x86/apple-gmux.c > >> +++ b/drivers/platform/x86/apple-gmux.c > >> @@ -698,7 +698,8 @@ static int gmux_probe(struct pnp_dev *pnp, const struct pnp_device_id *id) > >> props.max_brightness = GMUX_MAX_BRIGHTNESS; > >> > >> bdev = backlight_device_register("gmux_backlight", &pnp->dev, > >> - gmux_data, &gmux_bl_ops, &props); > >> + gmux_data, &gmux_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bdev)) { > >> ret = PTR_ERR(bdev); > >> goto err_release; > >> diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c > >> index 15f131146501..98f26cff9c96 100644 > >> --- a/drivers/platform/x86/asus-laptop.c > >> +++ b/drivers/platform/x86/asus-laptop.c > >> @@ -831,7 +831,8 @@ static int asus_backlight_init(struct asus_laptop *asus) > >> > >> bd = backlight_device_register(ASUS_LAPTOP_FILE, > >> &asus->platform_device->dev, asus, > >> - &asusbl_ops, &props); > >> + &asusbl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> pr_err("Could not register asus backlight device\n"); > >> asus->backlight_device = NULL; > >> diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c > >> index a26dca3640ea..ca897bc94626 100644 > >> --- a/drivers/platform/x86/asus-wmi.c > >> +++ b/drivers/platform/x86/asus-wmi.c > >> @@ -1565,7 +1565,8 @@ static int asus_wmi_backlight_init(struct asus_wmi *asus) > >> props.max_brightness = max; > >> bd = backlight_device_register(asus->driver->name, > >> &asus->platform_device->dev, asus, > >> - &asus_wmi_bl_ops, &props); > >> + &asus_wmi_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> pr_err("Could not register backlight device\n"); > >> return PTR_ERR(bd); > >> diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c > >> index 55cf10bc7817..60cf7a0c7170 100644 > >> --- a/drivers/platform/x86/classmate-laptop.c > >> +++ b/drivers/platform/x86/classmate-laptop.c > >> @@ -970,7 +970,8 @@ static int cmpc_ipml_add(struct acpi_device *acpi) > >> props.max_brightness = 7; > >> ipml->bd = backlight_device_register("cmpc_bl", &acpi->dev, > >> acpi->handle, &cmpc_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(ipml->bd)) { > >> retval = PTR_ERR(ipml->bd); > >> goto out_bd; > >> diff --git a/drivers/platform/x86/compal-laptop.c b/drivers/platform/x86/compal-laptop.c > >> index e1c2b6d4b24a..9a675d3b6fe5 100644 > >> --- a/drivers/platform/x86/compal-laptop.c > >> +++ b/drivers/platform/x86/compal-laptop.c > >> @@ -1008,7 +1008,8 @@ static int __init compal_init(void) > >> compalbl_device = backlight_device_register(DRIVER_NAME, > >> NULL, NULL, > >> &compalbl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(compalbl_device)) > >> return PTR_ERR(compalbl_device); > >> } > >> diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c > >> index 2c2f02b2e08a..57712a970f8d 100644 > >> --- a/drivers/platform/x86/dell-laptop.c > >> +++ b/drivers/platform/x86/dell-laptop.c > >> @@ -2035,7 +2035,8 @@ static int __init dell_init(void) > >> &platform_device->dev, > >> NULL, > >> &dell_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(dell_backlight_device)) { > >> ret = PTR_ERR(dell_backlight_device); > >> diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c > >> index 8cdf315f9730..da8ada2ba429 100644 > >> --- a/drivers/platform/x86/eeepc-laptop.c > >> +++ b/drivers/platform/x86/eeepc-laptop.c > >> @@ -1159,7 +1159,8 @@ static int eeepc_backlight_init(struct eeepc_laptop *eeepc) > >> props.max_brightness = 15; > >> bd = backlight_device_register(EEEPC_LAPTOP_FILE, > >> &eeepc->platform_device->dev, eeepc, > >> - &eeepcbl_ops, &props); > >> + &eeepcbl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> pr_err("Could not register eeepc backlight device\n"); > >> eeepc->backlight_device = NULL; > >> diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c > >> index ce41bc34288d..b54e7ea2e968 100644 > >> --- a/drivers/platform/x86/fujitsu-laptop.c > >> +++ b/drivers/platform/x86/fujitsu-laptop.c > >> @@ -1167,7 +1167,8 @@ static int __init fujitsu_init(void) > >> fujitsu->bl_device = backlight_device_register("fujitsu-laptop", > >> NULL, NULL, > >> &fujitsubl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(fujitsu->bl_device)) { > >> ret = PTR_ERR(fujitsu->bl_device); > >> fujitsu->bl_device = NULL; > >> diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c > >> index d1a091b93192..99de02efd971 100644 > >> --- a/drivers/platform/x86/ideapad-laptop.c > >> +++ b/drivers/platform/x86/ideapad-laptop.c > >> @@ -726,7 +726,8 @@ static int ideapad_backlight_init(struct ideapad_private *priv) > >> &priv->platform_device->dev, > >> priv, > >> &ideapad_backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(blightdev)) { > >> pr_err("Could not register backlight device\n"); > >> return PTR_ERR(blightdev); > >> diff --git a/drivers/platform/x86/intel_oaktrail.c b/drivers/platform/x86/intel_oaktrail.c > >> index 6aa33c4a809f..303e8e27a0b9 100644 > >> --- a/drivers/platform/x86/intel_oaktrail.c > >> +++ b/drivers/platform/x86/intel_oaktrail.c > >> @@ -253,7 +253,8 @@ static int oaktrail_backlight_init(void) > >> bd = backlight_device_register(DRIVER_NAME, > >> &oaktrail_device->dev, NULL, > >> &oaktrail_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(bd)) { > >> oaktrail_bl_device = NULL; > >> diff --git a/drivers/platform/x86/msi-laptop.c b/drivers/platform/x86/msi-laptop.c > >> index 42317704629d..81990bdab229 100644 > >> --- a/drivers/platform/x86/msi-laptop.c > >> +++ b/drivers/platform/x86/msi-laptop.c > >> @@ -1078,7 +1078,8 @@ static int __init msi_init(void) > >> props.max_brightness = MSI_LCD_LEVEL_MAX - 1; > >> msibl_device = backlight_device_register("msi-laptop-bl", NULL, > >> NULL, &msibl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(msibl_device)) > >> return PTR_ERR(msibl_device); > >> } > >> diff --git a/drivers/platform/x86/msi-wmi.c b/drivers/platform/x86/msi-wmi.c > >> index 978e6d640572..5174572a7859 100644 > >> --- a/drivers/platform/x86/msi-wmi.c > >> +++ b/drivers/platform/x86/msi-wmi.c > >> @@ -247,7 +247,8 @@ static int __init msi_wmi_backlight_setup(void) > >> props.max_brightness = ARRAY_SIZE(backlight_map) - 1; > >> backlight = backlight_device_register(DRV_NAME, NULL, NULL, > >> &msi_backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(backlight)) > >> return PTR_ERR(backlight); > >> > >> diff --git a/drivers/platform/x86/panasonic-laptop.c b/drivers/platform/x86/panasonic-laptop.c > >> index 3f870972247c..00679814d8c3 100644 > >> --- a/drivers/platform/x86/panasonic-laptop.c > >> +++ b/drivers/platform/x86/panasonic-laptop.c > >> @@ -618,7 +618,8 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) > >> props.type = BACKLIGHT_PLATFORM; > >> props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT]; > >> pcc->backlight = backlight_device_register("panasonic", NULL, pcc, > >> - &pcc_backlight_ops, &props); > >> + &pcc_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(pcc->backlight)) { > >> result = PTR_ERR(pcc->backlight); > >> goto out_input; > >> diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c > >> index 8c146e2b6727..09868706dfd6 100644 > >> --- a/drivers/platform/x86/samsung-laptop.c > >> +++ b/drivers/platform/x86/samsung-laptop.c > >> @@ -1200,7 +1200,8 @@ static int __init samsung_backlight_init(struct samsung_laptop *samsung) > >> bd = backlight_device_register("samsung", > >> &samsung->platform_device->dev, > >> samsung, &backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/platform/x86/samsung-q10.c b/drivers/platform/x86/samsung-q10.c > >> index e6aac725a0af..cc25d0416236 100644 > >> --- a/drivers/platform/x86/samsung-q10.c > >> +++ b/drivers/platform/x86/samsung-q10.c > >> @@ -60,7 +60,8 @@ static int samsungq10_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_PLATFORM; > >> props.max_brightness = SAMSUNGQ10_BL_MAX_INTENSITY; > >> bd = backlight_device_register("samsung", &pdev->dev, NULL, > >> - &samsungq10_bl_ops, &props); > >> + &samsungq10_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c > >> index 1dba3598cfcb..a20f30621e5f 100644 > >> --- a/drivers/platform/x86/sony-laptop.c > >> +++ b/drivers/platform/x86/sony-laptop.c > >> @@ -3158,7 +3158,8 @@ static void sony_nc_backlight_setup(void) > >> props.max_brightness = max_brightness; > >> sony_bl_props.dev = backlight_device_register("sony", NULL, > >> &sony_bl_props, > >> - ops, &props); > >> + ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(sony_bl_props.dev)) { > >> pr_warn("unable to register backlight device\n"); > >> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c > >> index b65ce7519411..987ef89b11da 100644 > >> --- a/drivers/platform/x86/thinkpad_acpi.c > >> +++ b/drivers/platform/x86/thinkpad_acpi.c > >> @@ -6821,7 +6821,8 @@ static int __init brightness_init(struct ibm_init_struct *iibm) > >> ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, > >> NULL, NULL, > >> &ibm_backlight_data, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(ibm_backlight_device)) { > >> int rc = PTR_ERR(ibm_backlight_device); > >> ibm_backlight_device = NULL; > >> diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c > >> index 01e12d221a8b..6b0f23360094 100644 > >> --- a/drivers/platform/x86/toshiba_acpi.c > >> +++ b/drivers/platform/x86/toshiba_acpi.c > >> @@ -2840,7 +2840,8 @@ static int toshiba_acpi_setup_backlight(struct toshiba_acpi_dev *dev) > >> &dev->acpi_dev->dev, > >> dev, > >> &toshiba_backlight_data, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(dev->backlight_dev)) { > >> ret = PTR_ERR(dev->backlight_dev); > >> pr_err("Could not register toshiba backlight device\n"); > >> diff --git a/drivers/staging/fbtft/fb_ssd1351.c b/drivers/staging/fbtft/fb_ssd1351.c > >> index cef33e439f46..6a194faf6448 100644 > >> --- a/drivers/staging/fbtft/fb_ssd1351.c > >> +++ b/drivers/staging/fbtft/fb_ssd1351.c > >> @@ -210,7 +210,8 @@ static void register_onboard_backlight(struct fbtft_par *par) > >> bl_props.power = FB_BLANK_POWERDOWN; > >> > >> bd = backlight_device_register(dev_driver_string(par->info->device), > >> - par->info->device, par, &bl_ops, &bl_props); > >> + par->info->device, par, &bl_ops, &bl_props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> dev_err(par->info->device, > >> "cannot register backlight device (%ld)\n", > >> diff --git a/drivers/staging/fbtft/fb_watterott.c b/drivers/staging/fbtft/fb_watterott.c > >> index f8cb610a7b69..b24913688014 100644 > >> --- a/drivers/staging/fbtft/fb_watterott.c > >> +++ b/drivers/staging/fbtft/fb_watterott.c > >> @@ -259,7 +259,8 @@ static void register_chip_backlight(struct fbtft_par *par) > >> bl_props.brightness = DEFAULT_BRIGHTNESS; > >> > >> bd = backlight_device_register(dev_driver_string(par->info->device), > >> - par->info->device, par, &bl_ops, &bl_props); > >> + par->info->device, par, &bl_ops, &bl_props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> dev_err(par->info->device, > >> "cannot register backlight device (%ld)\n", > >> diff --git a/drivers/staging/fbtft/fbtft-core.c b/drivers/staging/fbtft/fbtft-core.c > >> index 0c1a77cafe14..61c67b079b90 100644 > >> --- a/drivers/staging/fbtft/fbtft-core.c > >> +++ b/drivers/staging/fbtft/fbtft-core.c > >> @@ -299,7 +299,8 @@ void fbtft_register_backlight(struct fbtft_par *par) > >> bl_props.state |= BL_CORE_DRIVER1; > >> > >> bd = backlight_device_register(dev_driver_string(par->info->device), > >> - par->info->device, par, &fbtft_bl_ops, &bl_props); > >> + par->info->device, par, &fbtft_bl_ops, &bl_props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> dev_err(par->info->device, > >> "cannot register backlight device (%ld)\n", > >> diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c > >> index f45b2ef05f48..385c7adeaa26 100644 > >> --- a/drivers/staging/olpc_dcon/olpc_dcon.c > >> +++ b/drivers/staging/olpc_dcon/olpc_dcon.c > >> @@ -643,7 +643,8 @@ static int dcon_probe(struct i2c_client *client, const struct i2c_device_id *id) > >> /* Add the backlight device for the DCON */ > >> dcon_bl_props.brightness = dcon->bl_val; > >> dcon->bl_dev = backlight_device_register("dcon-bl", &dcon_device->dev, > >> - dcon, &dcon_bl_ops, &dcon_bl_props); > >> + dcon, &dcon_bl_ops, &dcon_bl_props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(dcon->bl_dev)) { > >> dev_err(&client->dev, "cannot register backlight dev (%ld)\n", > >> PTR_ERR(dcon->bl_dev)); > >> diff --git a/drivers/usb/misc/appledisplay.c b/drivers/usb/misc/appledisplay.c > >> index a0a3827b4aff..97c0829711a8 100644 > >> --- a/drivers/usb/misc/appledisplay.c > >> +++ b/drivers/usb/misc/appledisplay.c > >> @@ -293,7 +293,8 @@ static int appledisplay_probe(struct usb_interface *iface, > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = 0xff; > >> pdata->bd = backlight_device_register(bl_name, NULL, pdata, > >> - &appledisplay_bl_data, &props); > >> + &appledisplay_bl_data, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(pdata->bd)) { > >> dev_err(&iface->dev, "Backlight registration failed\n"); > >> retval = PTR_ERR(pdata->bd); > >> diff --git a/drivers/video/backlight/88pm860x_bl.c b/drivers/video/backlight/88pm860x_bl.c > >> index 6d8dc2c77520..e0d8212aebc0 100644 > >> --- a/drivers/video/backlight/88pm860x_bl.c > >> +++ b/drivers/video/backlight/88pm860x_bl.c > >> @@ -242,7 +242,8 @@ static int pm860x_backlight_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = MAX_BRIGHTNESS; > >> bl = devm_backlight_device_register(&pdev->dev, name, &pdev->dev, data, > >> - &pm860x_backlight_ops, &props); > >> + &pm860x_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/aat2870_bl.c b/drivers/video/backlight/aat2870_bl.c > >> index 50774e657700..a4cbc33bd6c2 100644 > >> --- a/drivers/video/backlight/aat2870_bl.c > >> +++ b/drivers/video/backlight/aat2870_bl.c > >> @@ -152,7 +152,8 @@ static int aat2870_bl_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> bd = devm_backlight_device_register(&pdev->dev, "aat2870-backlight", > >> &pdev->dev, aat2870_bl, &aat2870_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> dev_err(&pdev->dev, > >> "Failed allocate memory for backlight device\n"); > >> diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c > >> index dd88ba1d71ce..03093fbee414 100644 > >> --- a/drivers/video/backlight/adp5520_bl.c > >> +++ b/drivers/video/backlight/adp5520_bl.c > >> @@ -315,7 +315,8 @@ static int adp5520_bl_probe(struct platform_device *pdev) > >> props.max_brightness = ADP5020_MAX_BRIGHTNESS; > >> bl = devm_backlight_device_register(&pdev->dev, pdev->name, > >> data->master, data, &adp5520_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c > >> index 510e559c060e..88982ed257d9 100644 > >> --- a/drivers/video/backlight/adp8860_bl.c > >> +++ b/drivers/video/backlight/adp8860_bl.c > >> @@ -718,7 +718,8 @@ static int adp8860_probe(struct i2c_client *client, > >> > >> bl = devm_backlight_device_register(&client->dev, > >> dev_driver_string(&client->dev), > >> - &client->dev, data, &adp8860_bl_ops, &props); > >> + &client->dev, data, &adp8860_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&client->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c > >> index 21acac90fd77..5284f7f3cdd3 100644 > >> --- a/drivers/video/backlight/adp8870_bl.c > >> +++ b/drivers/video/backlight/adp8870_bl.c > >> @@ -894,7 +894,8 @@ static int adp8870_probe(struct i2c_client *client, > >> props.max_brightness = props.brightness = ADP8870_MAX_BRIGHTNESS; > >> bl = devm_backlight_device_register(&client->dev, > >> dev_driver_string(&client->dev), > >> - &client->dev, data, &adp8870_bl_ops, &props); > >> + &client->dev, data, &adp8870_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&client->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/ams369fg06.c b/drivers/video/backlight/ams369fg06.c > >> index 5cca8ce45d4d..1bd656141c1e 100644 > >> --- a/drivers/video/backlight/ams369fg06.c > >> +++ b/drivers/video/backlight/ams369fg06.c > >> @@ -484,7 +484,8 @@ static int ams369fg06_probe(struct spi_device *spi) > >> > >> bd = devm_backlight_device_register(&spi->dev, "ams369fg06-bl", > >> &spi->dev, lcd, > >> - &ams369fg06_backlight_ops, &props); > >> + &ams369fg06_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/video/backlight/apple_bl.c b/drivers/video/backlight/apple_bl.c > >> index d84329676689..ee2e92d58512 100644 > >> --- a/drivers/video/backlight/apple_bl.c > >> +++ b/drivers/video/backlight/apple_bl.c > >> @@ -182,7 +182,8 @@ static int apple_bl_add(struct acpi_device *dev) > >> props.type = BACKLIGHT_PLATFORM; > >> props.max_brightness = 15; > >> apple_backlight_device = backlight_device_register("apple_backlight", > >> - NULL, NULL, &hw_data->backlight_ops, &props); > >> + NULL, NULL, &hw_data->backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(apple_backlight_device)) { > >> release_region(hw_data->iostart, hw_data->iolen); > >> diff --git a/drivers/video/backlight/as3711_bl.c b/drivers/video/backlight/as3711_bl.c > >> index 734a9158946b..5f3a40bc8a85 100644 > >> --- a/drivers/video/backlight/as3711_bl.c > >> +++ b/drivers/video/backlight/as3711_bl.c > >> @@ -244,7 +244,8 @@ static int as3711_bl_register(struct platform_device *pdev, > >> su->type == AS3711_BL_SU1 ? > >> "as3711-su1" : "as3711-su2", > >> &pdev->dev, su, > >> - &as3711_bl_ops, &props); > >> + &as3711_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c > >> index 288318ad21dd..1a25273576e8 100644 > >> --- a/drivers/video/backlight/backlight.c > >> +++ b/drivers/video/backlight/backlight.c > >> @@ -319,13 +319,15 @@ EXPORT_SYMBOL(backlight_force_update); > >> * @devdata: an optional pointer to be stored for private driver use. The > >> * methods may retrieve it by using bl_get_data(bd). > >> * @ops: the backlight operations structure. > >> + * @flags: bitmask to control backlight registration > >> * > >> * Creates and registers new backlight device. Returns either an > >> * ERR_PTR() or a pointer to the newly allocated device. > >> */ > >> struct backlight_device *backlight_device_register(const char *name, > >> struct device *parent, void *devdata, const struct backlight_ops *ops, > >> - const struct backlight_properties *props) > >> + const struct backlight_properties *props, > >> + unsigned long flags) > >> { > >> struct backlight_device *new_bd; > >> int rc; > >> @@ -363,10 +365,12 @@ struct backlight_device *backlight_device_register(const char *name, > >> return ERR_PTR(rc); > >> } > >> > >> - rc = backlight_register_fb(new_bd); > >> - if (rc) { > >> - device_unregister(&new_bd->dev); > >> - return ERR_PTR(rc); > >> + if (flags & BACKLIGHT_REGISTER_FB_CLIENT) { > >> + rc = backlight_register_fb(new_bd); > >> + if (rc) { > >> + device_unregister(&new_bd->dev); > >> + return ERR_PTR(rc); > >> + } > >> } > >> > >> new_bd->ops = ops; > >> @@ -494,6 +498,7 @@ EXPORT_SYMBOL(backlight_unregister_notifier); > >> * @devdata: an optional pointer to be stored for private driver use > >> * @ops: the backlight operations structure > >> * @props: the backlight properties > >> + * @flags: bitmask to control backlight registration > >> * > >> * @return a struct backlight on success, or an ERR_PTR on error > >> * > >> @@ -504,7 +509,8 @@ EXPORT_SYMBOL(backlight_unregister_notifier); > >> struct backlight_device *devm_backlight_device_register(struct device *dev, > >> const char *name, struct device *parent, void *devdata, > >> const struct backlight_ops *ops, > >> - const struct backlight_properties *props) > >> + const struct backlight_properties *props, > >> + unsigned long flags) > >> { > >> struct backlight_device **ptr, *backlight; > >> > >> @@ -514,7 +520,7 @@ struct backlight_device *devm_backlight_device_register(struct device *dev, > >> return ERR_PTR(-ENOMEM); > >> > >> backlight = backlight_device_register(name, parent, devdata, ops, > >> - props); > >> + props, flags); > >> if (!IS_ERR(backlight)) { > >> *ptr = backlight; > >> devres_add(dev, ptr); > >> diff --git a/drivers/video/backlight/bd6107.c b/drivers/video/backlight/bd6107.c > >> index fdb2f7e2c6b5..a8ecd7a2f2a4 100644 > >> --- a/drivers/video/backlight/bd6107.c > >> +++ b/drivers/video/backlight/bd6107.c > >> @@ -163,7 +163,8 @@ static int bd6107_probe(struct i2c_client *client, > >> backlight = devm_backlight_device_register(&client->dev, > >> dev_name(&client->dev), > >> &bd->client->dev, bd, > >> - &bd6107_backlight_ops, &props); > >> + &bd6107_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(backlight)) { > >> dev_err(&client->dev, "failed to register backlight\n"); > >> return PTR_ERR(backlight); > >> diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c > >> index d7c239ea3d09..006e171256a0 100644 > >> --- a/drivers/video/backlight/corgi_lcd.c > >> +++ b/drivers/video/backlight/corgi_lcd.c > >> @@ -562,7 +562,8 @@ static int corgi_lcd_probe(struct spi_device *spi) > >> props.max_brightness = pdata->max_intensity; > >> lcd->bl_dev = devm_backlight_device_register(&spi->dev, "corgi_bl", > >> &spi->dev, lcd, &corgi_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(lcd->bl_dev)) > >> return PTR_ERR(lcd->bl_dev); > >> > >> diff --git a/drivers/video/backlight/cr_bllcd.c b/drivers/video/backlight/cr_bllcd.c > >> index 3e3880fc8c8e..cf7c5d35dd63 100644 > >> --- a/drivers/video/backlight/cr_bllcd.c > >> +++ b/drivers/video/backlight/cr_bllcd.c > >> @@ -197,7 +197,8 @@ static int cr_backlight_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> bdp = devm_backlight_device_register(&pdev->dev, "cr-backlight", > >> &pdev->dev, NULL, &cr_backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bdp)) { > >> pci_dev_put(lpc_dev); > >> return PTR_ERR(bdp); > >> diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c > >> index f793738f06fb..d6019aebfa42 100644 > >> --- a/drivers/video/backlight/da903x_bl.c > >> +++ b/drivers/video/backlight/da903x_bl.c > >> @@ -146,7 +146,8 @@ static int da903x_backlight_probe(struct platform_device *pdev) > >> props.max_brightness = max_brightness; > >> bl = devm_backlight_device_register(&pdev->dev, pdev->name, > >> data->da903x_dev, data, > >> - &da903x_backlight_ops, &props); > >> + &da903x_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/da9052_bl.c b/drivers/video/backlight/da9052_bl.c > >> index fd2be417aa64..96738c2e8a09 100644 > >> --- a/drivers/video/backlight/da9052_bl.c > >> +++ b/drivers/video/backlight/da9052_bl.c > >> @@ -127,7 +127,8 @@ static int da9052_backlight_probe(struct platform_device *pdev) > >> > >> bl = devm_backlight_device_register(&pdev->dev, pdev->name, > >> wleds->da9052->dev, wleds, > >> - &da9052_backlight_ops, &props); > >> + &da9052_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "Failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/ep93xx_bl.c b/drivers/video/backlight/ep93xx_bl.c > >> index 0067931821c6..7fe2549969a1 100644 > >> --- a/drivers/video/backlight/ep93xx_bl.c > >> +++ b/drivers/video/backlight/ep93xx_bl.c > >> @@ -93,7 +93,8 @@ static int ep93xxbl_probe(struct platform_device *dev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = EP93XX_MAX_BRIGHT; > >> bl = devm_backlight_device_register(&dev->dev, dev->name, &dev->dev, > >> - ep93xxbl, &ep93xxbl_ops, &props); > >> + ep93xxbl, &ep93xxbl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) > >> return PTR_ERR(bl); > >> > >> diff --git a/drivers/video/backlight/generic_bl.c b/drivers/video/backlight/generic_bl.c > >> index 67dfb939a514..717318e12f87 100644 > >> --- a/drivers/video/backlight/generic_bl.c > >> +++ b/drivers/video/backlight/generic_bl.c > >> @@ -76,7 +76,8 @@ static int genericbl_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = machinfo->max_intensity; > >> bd = devm_backlight_device_register(&pdev->dev, name, &pdev->dev, > >> - NULL, &genericbl_ops, &props); > >> + NULL, &genericbl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/video/backlight/gpio_backlight.c b/drivers/video/backlight/gpio_backlight.c > >> index 18134416b154..d0b6f5155f86 100644 > >> --- a/drivers/video/backlight/gpio_backlight.c > >> +++ b/drivers/video/backlight/gpio_backlight.c > >> @@ -132,7 +132,8 @@ static int gpio_backlight_probe(struct platform_device *pdev) > >> props.max_brightness = 1; > >> bl = devm_backlight_device_register(&pdev->dev, dev_name(&pdev->dev), > >> &pdev->dev, gbl, &gpio_backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/hp680_bl.c b/drivers/video/backlight/hp680_bl.c > >> index 8ea42b8d9bc8..a75b2d0d489a 100644 > >> --- a/drivers/video/backlight/hp680_bl.c > >> +++ b/drivers/video/backlight/hp680_bl.c > >> @@ -111,7 +111,8 @@ static int hp680bl_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = HP680_MAX_INTENSITY; > >> bd = devm_backlight_device_register(&pdev->dev, "hp680-bl", &pdev->dev, > >> - NULL, &hp680bl_ops, &props); > >> + NULL, &hp680bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/video/backlight/ipaq_micro_bl.c b/drivers/video/backlight/ipaq_micro_bl.c > >> index 347dc11d4ceb..834ccc8a7291 100644 > >> --- a/drivers/video/backlight/ipaq_micro_bl.c > >> +++ b/drivers/video/backlight/ipaq_micro_bl.c > >> @@ -60,7 +60,8 @@ static int micro_backlight_probe(struct platform_device *pdev) > >> > >> bd = devm_backlight_device_register(&pdev->dev, "ipaq-micro-backlight", > >> &pdev->dev, micro, µ_bl_ops, > >> - µ_bl_props); > >> + µ_bl_props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/video/backlight/jornada720_bl.c b/drivers/video/backlight/jornada720_bl.c > >> index 7e6ff5346892..e173c5b60e9e 100644 > >> --- a/drivers/video/backlight/jornada720_bl.c > >> +++ b/drivers/video/backlight/jornada720_bl.c > >> @@ -118,7 +118,8 @@ static int jornada_bl_probe(struct platform_device *pdev) > >> > >> bd = devm_backlight_device_register(&pdev->dev, S1D_DEVICENAME, > >> &pdev->dev, NULL, &jornada_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> ret = PTR_ERR(bd); > >> dev_err(&pdev->dev, "failed to register device, err=%x\n", ret); > >> diff --git a/drivers/video/backlight/kb3886_bl.c b/drivers/video/backlight/kb3886_bl.c > >> index 84a110a719cb..eb619c4a7a39 100644 > >> --- a/drivers/video/backlight/kb3886_bl.c > >> +++ b/drivers/video/backlight/kb3886_bl.c > >> @@ -153,7 +153,8 @@ static int kb3886bl_probe(struct platform_device *pdev) > >> kb3886_backlight_device = devm_backlight_device_register(&pdev->dev, > >> "kb3886-bl", &pdev->dev, > >> NULL, &kb3886bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(kb3886_backlight_device)) > >> return PTR_ERR(kb3886_backlight_device); > >> > >> diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c > >> index 677f8abba27c..c28e91fec54f 100644 > >> --- a/drivers/video/backlight/ld9040.c > >> +++ b/drivers/video/backlight/ld9040.c > >> @@ -722,7 +722,8 @@ static int ld9040_probe(struct spi_device *spi) > >> props.max_brightness = MAX_BRIGHTNESS; > >> > >> bd = devm_backlight_device_register(&spi->dev, "ld9040-bl", &spi->dev, > >> - lcd, &ld9040_backlight_ops, &props); > >> + lcd, &ld9040_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c > >> index 0e2337f367b6..f6345a2cd076 100644 > >> --- a/drivers/video/backlight/lm3533_bl.c > >> +++ b/drivers/video/backlight/lm3533_bl.c > >> @@ -312,7 +312,8 @@ static int lm3533_bl_probe(struct platform_device *pdev) > >> props.brightness = pdata->default_brightness; > >> bd = devm_backlight_device_register(&pdev->dev, pdata->name, > >> pdev->dev.parent, bl, &lm3533_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> dev_err(&pdev->dev, "failed to register backlight device\n"); > >> return PTR_ERR(bd); > >> diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c > >> index 60d6c2ac87aa..a62a09510fe3 100644 > >> --- a/drivers/video/backlight/lm3630a_bl.c > >> +++ b/drivers/video/backlight/lm3630a_bl.c > >> @@ -338,7 +338,8 @@ static int lm3630a_backlight_register(struct lm3630a_chip *pchip) > >> pchip->bleda = > >> devm_backlight_device_register(pchip->dev, "lm3630a_leda", > >> pchip->dev, pchip, > >> - &lm3630a_bank_a_ops, &props); > >> + &lm3630a_bank_a_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(pchip->bleda)) > >> return PTR_ERR(pchip->bleda); > >> } > >> @@ -350,7 +351,8 @@ static int lm3630a_backlight_register(struct lm3630a_chip *pchip) > >> pchip->bledb = > >> devm_backlight_device_register(pchip->dev, "lm3630a_ledb", > >> pchip->dev, pchip, > >> - &lm3630a_bank_b_ops, &props); > >> + &lm3630a_bank_b_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(pchip->bledb)) > >> return PTR_ERR(pchip->bledb); > >> } > >> diff --git a/drivers/video/backlight/lm3639_bl.c b/drivers/video/backlight/lm3639_bl.c > >> index cd50df5807ea..4aaf0c3f9eee 100644 > >> --- a/drivers/video/backlight/lm3639_bl.c > >> +++ b/drivers/video/backlight/lm3639_bl.c > >> @@ -349,7 +349,8 @@ static int lm3639_probe(struct i2c_client *client, > >> pchip->bled = > >> devm_backlight_device_register(pchip->dev, "lm3639_bled", > >> pchip->dev, pchip, &lm3639_bled_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(pchip->bled)) { > >> dev_err(&client->dev, "fail : backlight register\n"); > >> ret = PTR_ERR(pchip->bled); > >> diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c > >> index 6c3ec4259a60..126a4df5fd12 100644 > >> --- a/drivers/video/backlight/locomolcd.c > >> +++ b/drivers/video/backlight/locomolcd.c > >> @@ -200,7 +200,8 @@ static int locomolcd_probe(struct locomo_dev *ldev) > >> props.max_brightness = 4; > >> locomolcd_bl_device = backlight_device_register("locomo-bl", > >> &ldev->dev, NULL, > >> - &locomobl_data, &props); > >> + &locomobl_data, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(locomolcd_bl_device)) > >> return PTR_ERR(locomolcd_bl_device); > >> diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c > >> index e5b14f52628f..6ef51c6540a6 100644 > >> --- a/drivers/video/backlight/lp855x_bl.c > >> +++ b/drivers/video/backlight/lp855x_bl.c > >> @@ -299,7 +299,8 @@ static int lp855x_backlight_register(struct lp855x *lp) > >> props.brightness = pdata->initial_brightness; > >> > >> bl = devm_backlight_device_register(lp->dev, name, lp->dev, lp, > >> - &lp855x_bl_ops, &props); > >> + &lp855x_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) > >> return PTR_ERR(bl); > >> > >> diff --git a/drivers/video/backlight/lp8788_bl.c b/drivers/video/backlight/lp8788_bl.c > >> index cf869ec90cce..734677bef739 100644 > >> --- a/drivers/video/backlight/lp8788_bl.c > >> +++ b/drivers/video/backlight/lp8788_bl.c > >> @@ -214,7 +214,8 @@ static int lp8788_backlight_register(struct lp8788_bl *bl) > >> name = pdata->name; > >> > >> bl_dev = backlight_device_register(name, bl->lp->dev, bl, > >> - &lp8788_bl_ops, &props); > >> + &lp8788_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl_dev)) > >> return PTR_ERR(bl_dev); > >> > >> diff --git a/drivers/video/backlight/lv5207lp.c b/drivers/video/backlight/lv5207lp.c > >> index 8ab7297b118a..ebd41edcd936 100644 > >> --- a/drivers/video/backlight/lv5207lp.c > >> +++ b/drivers/video/backlight/lv5207lp.c > >> @@ -120,7 +120,8 @@ static int lv5207lp_probe(struct i2c_client *client, > >> > >> backlight = devm_backlight_device_register(&client->dev, > >> dev_name(&client->dev), &lv->client->dev, > >> - lv, &lv5207lp_backlight_ops, &props); > >> + lv, &lv5207lp_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(backlight)) { > >> dev_err(&client->dev, "failed to register backlight\n"); > >> return PTR_ERR(backlight); > >> diff --git a/drivers/video/backlight/max8925_bl.c b/drivers/video/backlight/max8925_bl.c > >> index 7b738d60ecc2..aa1d39ab9977 100644 > >> --- a/drivers/video/backlight/max8925_bl.c > >> +++ b/drivers/video/backlight/max8925_bl.c > >> @@ -165,7 +165,8 @@ static int max8925_backlight_probe(struct platform_device *pdev) > >> props.max_brightness = MAX_BRIGHTNESS; > >> bl = devm_backlight_device_register(&pdev->dev, "max8925-backlight", > >> &pdev->dev, data, > >> - &max8925_backlight_ops, &props); > >> + &max8925_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c > >> index 546d94df21d5..c587a4ec89a2 100644 > >> --- a/drivers/video/backlight/omap1_bl.c > >> +++ b/drivers/video/backlight/omap1_bl.c > >> @@ -148,7 +148,8 @@ static int omapbl_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = OMAPBL_MAX_INTENSITY; > >> dev = devm_backlight_device_register(&pdev->dev, "omap-bl", &pdev->dev, > >> - bl, &omapbl_ops, &props); > >> + bl, &omapbl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(dev)) > >> return PTR_ERR(dev); > >> > >> diff --git a/drivers/video/backlight/ot200_bl.c b/drivers/video/backlight/ot200_bl.c > >> index 3acdb9f646ed..36d71b32b9cd 100644 > >> --- a/drivers/video/backlight/ot200_bl.c > >> +++ b/drivers/video/backlight/ot200_bl.c > >> @@ -120,7 +120,8 @@ static int ot200_backlight_probe(struct platform_device *pdev) > >> > >> bl = devm_backlight_device_register(&pdev->dev, dev_name(&pdev->dev), > >> &pdev->dev, data, &ot200_backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> retval = PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/pandora_bl.c b/drivers/video/backlight/pandora_bl.c > >> index 5d8bb8b20183..b654543ea895 100644 > >> --- a/drivers/video/backlight/pandora_bl.c > >> +++ b/drivers/video/backlight/pandora_bl.c > >> @@ -115,7 +115,8 @@ static int pandora_backlight_probe(struct platform_device *pdev) > >> props.max_brightness = MAX_USER_VALUE; > >> props.type = BACKLIGHT_RAW; > >> bl = devm_backlight_device_register(&pdev->dev, pdev->name, &pdev->dev, > >> - NULL, &pandora_backlight_ops, &props); > >> + NULL, &pandora_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/pcf50633-backlight.c b/drivers/video/backlight/pcf50633-backlight.c > >> index 85bd573b6d15..8f3dd6b22088 100644 > >> --- a/drivers/video/backlight/pcf50633-backlight.c > >> +++ b/drivers/video/backlight/pcf50633-backlight.c > >> @@ -129,7 +129,8 @@ static int pcf50633_bl_probe(struct platform_device *pdev) > >> > >> pcf_bl->bl = devm_backlight_device_register(&pdev->dev, pdev->name, > >> &pdev->dev, pcf_bl, > >> - &pcf50633_bl_ops, &bl_props); > >> + &pcf50633_bl_ops, &bl_props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> if (IS_ERR(pcf_bl->bl)) > >> return PTR_ERR(pcf_bl->bl); > >> diff --git a/drivers/video/backlight/pm8941-wled.c b/drivers/video/backlight/pm8941-wled.c > >> index 0b6d21955d91..85035f2f784f 100644 > >> --- a/drivers/video/backlight/pm8941-wled.c > >> +++ b/drivers/video/backlight/pm8941-wled.c > >> @@ -408,7 +408,8 @@ static int pm8941_wled_probe(struct platform_device *pdev) > >> props.max_brightness = PM8941_WLED_REG_VAL_MAX; > >> bl = devm_backlight_device_register(&pdev->dev, wled->name, > >> &pdev->dev, wled, > >> - &pm8941_wled_ops, &props); > >> + &pm8941_wled_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> return PTR_ERR_OR_ZERO(bl); > >> }; > >> > >> diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c > >> index b2b366bb0f97..98655fce462c 100644 > >> --- a/drivers/video/backlight/pwm_bl.c > >> +++ b/drivers/video/backlight/pwm_bl.c > >> @@ -330,7 +330,8 @@ static int pwm_backlight_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = data->max_brightness; > >> bl = backlight_device_register(dev_name(&pdev->dev), &pdev->dev, pb, > >> - &pwm_backlight_ops, &props); > >> + &pwm_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> ret = PTR_ERR(bl); > >> diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c > >> index 3c4a22a3063a..60bc88075e68 100644 > >> --- a/drivers/video/backlight/s6e63m0.c > >> +++ b/drivers/video/backlight/s6e63m0.c > >> @@ -748,7 +748,8 @@ static int s6e63m0_probe(struct spi_device *spi) > >> > >> bd = devm_backlight_device_register(&spi->dev, "s6e63m0bl-bl", > >> &spi->dev, lcd, &s6e63m0_backlight_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) > >> return PTR_ERR(bd); > >> > >> diff --git a/drivers/video/backlight/sky81452-backlight.c b/drivers/video/backlight/sky81452-backlight.c > >> index d414c7a3acf5..9abdbcf71fef 100644 > >> --- a/drivers/video/backlight/sky81452-backlight.c > >> +++ b/drivers/video/backlight/sky81452-backlight.c > >> @@ -294,7 +294,8 @@ static int sky81452_bl_probe(struct platform_device *pdev) > >> props.max_brightness = SKY81452_MAX_BRIGHTNESS, > >> name = pdata->name ? pdata->name : SKY81452_DEFAULT_NAME; > >> bd = devm_backlight_device_register(dev, name, dev, regmap, > >> - &sky81452_bl_ops, &props); > >> + &sky81452_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(bd)); > >> return PTR_ERR(bd); > >> diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c > >> index 83742d806391..755a61727ca1 100644 > >> --- a/drivers/video/backlight/tosa_bl.c > >> +++ b/drivers/video/backlight/tosa_bl.c > >> @@ -107,7 +107,8 @@ static int tosa_bl_probe(struct i2c_client *client, > >> props.max_brightness = 512 - 1; > >> data->bl = devm_backlight_device_register(&client->dev, "tosa-bl", > >> &client->dev, data, &bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(data->bl)) { > >> ret = PTR_ERR(data->bl); > >> goto err_reg; > >> diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c > >> index fd524ad860a5..0ac55b9a773c 100644 > >> --- a/drivers/video/backlight/tps65217_bl.c > >> +++ b/drivers/video/backlight/tps65217_bl.c > >> @@ -306,7 +306,8 @@ static int tps65217_bl_probe(struct platform_device *pdev) > >> > >> tps65217_bl->bl = devm_backlight_device_register(&pdev->dev, pdev->name, > >> tps65217_bl->dev, tps65217_bl, > >> - &tps65217_bl_ops, &bl_props); > >> + &tps65217_bl_ops, &bl_props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(tps65217_bl->bl)) { > >> dev_err(tps65217_bl->dev, > >> "registration of backlight device failed: %d\n", rc); > >> diff --git a/drivers/video/backlight/wm831x_bl.c b/drivers/video/backlight/wm831x_bl.c > >> index 6eab0d6c262a..8b92a277f83b 100644 > >> --- a/drivers/video/backlight/wm831x_bl.c > >> +++ b/drivers/video/backlight/wm831x_bl.c > >> @@ -197,7 +197,8 @@ static int wm831x_backlight_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = max_isel; > >> bl = devm_backlight_device_register(&pdev->dev, "wm831x", &pdev->dev, > >> - data, &wm831x_backlight_ops, &props); > >> + data, &wm831x_backlight_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&pdev->dev, "failed to register backlight\n"); > >> return PTR_ERR(bl); > >> diff --git a/drivers/video/fbdev/atmel_lcdfb.c b/drivers/video/fbdev/atmel_lcdfb.c > >> index 669ecc755fa9..d6c46d670622 100644 > >> --- a/drivers/video/fbdev/atmel_lcdfb.c > >> +++ b/drivers/video/fbdev/atmel_lcdfb.c > >> @@ -244,7 +244,8 @@ static void init_backlight(struct atmel_lcdfb_info *sinfo) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = 0xff; > >> bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo, > >> - &atmel_lcdc_bl_ops, &props); > >> + &atmel_lcdc_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n", > >> PTR_ERR(bl)); > >> diff --git a/drivers/video/fbdev/aty/aty128fb.c b/drivers/video/fbdev/aty/aty128fb.c > >> index 0a4626886b00..dae8734870c9 100644 > >> --- a/drivers/video/fbdev/aty/aty128fb.c > >> +++ b/drivers/video/fbdev/aty/aty128fb.c > >> @@ -1871,7 +1871,8 @@ static void aty128_bl_init(struct aty128fb_par *par) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = FB_BACKLIGHT_LEVELS - 1; > >> bd = backlight_device_register(name, info->dev, par, &aty128_bl_data, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> info->bl_dev = NULL; > >> printk(KERN_WARNING "aty128: Backlight registration failed\n"); > >> diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c > >> index f34ed47fcaf8..918ec8f946aa 100644 > >> --- a/drivers/video/fbdev/aty/atyfb_base.c > >> +++ b/drivers/video/fbdev/aty/atyfb_base.c > >> @@ -2242,7 +2242,8 @@ static void aty_bl_init(struct atyfb_par *par) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = FB_BACKLIGHT_LEVELS - 1; > >> bd = backlight_device_register(name, info->dev, par, &aty_bl_data, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> info->bl_dev = NULL; > >> printk(KERN_WARNING "aty: Backlight registration failed\n"); > >> diff --git a/drivers/video/fbdev/aty/radeon_backlight.c b/drivers/video/fbdev/aty/radeon_backlight.c > >> index 301d6d6aeead..a8c9ef618e42 100644 > >> --- a/drivers/video/fbdev/aty/radeon_backlight.c > >> +++ b/drivers/video/fbdev/aty/radeon_backlight.c > >> @@ -155,7 +155,8 @@ void radeonfb_bl_init(struct radeonfb_info *rinfo) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = FB_BACKLIGHT_LEVELS - 1; > >> bd = backlight_device_register(name, rinfo->info->dev, pdata, > >> - &radeon_bl_data, &props); > >> + &radeon_bl_data, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> rinfo->info->bl_dev = NULL; > >> printk("radeonfb: Backlight registration failed\n"); > >> diff --git a/drivers/video/fbdev/bf537-lq035.c b/drivers/video/fbdev/bf537-lq035.c > >> index ef29fb425122..77b6f98d2182 100644 > >> --- a/drivers/video/fbdev/bf537-lq035.c > >> +++ b/drivers/video/fbdev/bf537-lq035.c > >> @@ -765,7 +765,8 @@ static int bfin_lq035_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = MAX_BRIGHENESS; > >> bl_dev = backlight_device_register("bf537-bl", NULL, NULL, > >> - &bfin_lq035fb_bl_ops, &props); > >> + &bfin_lq035fb_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> > >> lcd_dev = lcd_device_register(KBUILD_MODNAME, &pdev->dev, NULL, > >> &bfin_lcd_ops); > >> diff --git a/drivers/video/fbdev/bf54x-lq043fb.c b/drivers/video/fbdev/bf54x-lq043fb.c > >> index 8f1f97c75619..4001f3c9c40c 100644 > >> --- a/drivers/video/fbdev/bf54x-lq043fb.c > >> +++ b/drivers/video/fbdev/bf54x-lq043fb.c > >> @@ -652,7 +652,8 @@ static int bfin_bf54x_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = 255; > >> bl_dev = backlight_device_register("bf54x-bl", NULL, NULL, > >> - &bfin_lq043fb_bl_ops, &props); > >> + &bfin_lq043fb_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl_dev)) { > >> printk(KERN_ERR DRIVER_NAME > >> ": unable to register backlight.\n"); > >> diff --git a/drivers/video/fbdev/bfin-t350mcqb-fb.c b/drivers/video/fbdev/bfin-t350mcqb-fb.c > >> index e5ee4d9677f7..6c1c64f48432 100644 > >> --- a/drivers/video/fbdev/bfin-t350mcqb-fb.c > >> +++ b/drivers/video/fbdev/bfin-t350mcqb-fb.c > >> @@ -549,7 +549,8 @@ static int bfin_t350mcqb_probe(struct platform_device *pdev) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = 255; > >> bl_dev = backlight_device_register("bf52x-bl", NULL, NULL, > >> - &bfin_lq043fb_bl_ops, &props); > >> + &bfin_lq043fb_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl_dev)) { > >> printk(KERN_ERR DRIVER_NAME > >> ": unable to register backlight.\n"); > >> diff --git a/drivers/video/fbdev/exynos/s6e8ax0.c b/drivers/video/fbdev/exynos/s6e8ax0.c > >> index de2f3e793786..a78c6effab97 100644 > >> --- a/drivers/video/fbdev/exynos/s6e8ax0.c > >> +++ b/drivers/video/fbdev/exynos/s6e8ax0.c > >> @@ -796,7 +796,8 @@ static int s6e8ax0_probe(struct mipi_dsim_lcd_device *dsim_dev) > >> } > >> > >> lcd->bd = devm_backlight_device_register(lcd->dev, "s6e8ax0-bl", > >> - lcd->dev, lcd, &s6e8ax0_backlight_ops, NULL); > >> + lcd->dev, lcd, &s6e8ax0_backlight_ops, NULL, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(lcd->bd)) { > >> dev_err(lcd->dev, "failed to register backlight ops.\n"); > >> return PTR_ERR(lcd->bd); > >> diff --git a/drivers/video/fbdev/mx3fb.c b/drivers/video/fbdev/mx3fb.c > >> index f91b1db262b0..c13c365e6622 100644 > >> --- a/drivers/video/fbdev/mx3fb.c > >> +++ b/drivers/video/fbdev/mx3fb.c > >> @@ -319,7 +319,8 @@ static void mx3fb_init_backlight(struct mx3fb_data *fbd) > >> sdc_set_brightness(fbd, fbd->backlight_level); > >> > >> bl = backlight_device_register("mx3fb-bl", fbd->dev, fbd, > >> - &mx3fb_lcdc_bl_ops, &props); > >> + &mx3fb_lcdc_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(fbd->dev, "error %ld on backlight register\n", > >> PTR_ERR(bl)); > >> diff --git a/drivers/video/fbdev/nvidia/nv_backlight.c b/drivers/video/fbdev/nvidia/nv_backlight.c > >> index 5c151b2ea683..fdb91547b02f 100644 > >> --- a/drivers/video/fbdev/nvidia/nv_backlight.c > >> +++ b/drivers/video/fbdev/nvidia/nv_backlight.c > >> @@ -108,7 +108,8 @@ void nvidia_bl_init(struct nvidia_par *par) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = FB_BACKLIGHT_LEVELS - 1; > >> bd = backlight_device_register(name, info->dev, par, &nvidia_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> info->bl_dev = NULL; > >> printk(KERN_WARNING "nvidia: Backlight registration failed\n"); > >> diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c > >> index b58012b82b6f..2c5fccf81391 100644 > >> --- a/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c > >> +++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-dsi-cm.c > >> @@ -1259,7 +1259,8 @@ static int dsicm_probe(struct platform_device *pdev) > >> > >> props.type = BACKLIGHT_RAW; > >> bldev = backlight_device_register(dev_name(dev), > >> - dev, ddata, &dsicm_bl_ops, &props); > >> + dev, ddata, &dsicm_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bldev)) { > >> r = PTR_ERR(bldev); > >> goto err_bl; > >> diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c > >> index 468560a6daae..8d7821e8bb0a 100644 > >> --- a/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c > >> +++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-sony-acx565akm.c > >> @@ -816,7 +816,8 @@ static int acx565akm_probe(struct spi_device *spi) > >> props.type = BACKLIGHT_RAW; > >> > >> bldev = backlight_device_register("acx565akm", &ddata->spi->dev, > >> - ddata, &acx565akm_bl_ops, &props); > >> + ddata, &acx565akm_bl_ops, &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bldev)) { > >> r = PTR_ERR(bldev); > >> goto err_reg_bl; > >> diff --git a/drivers/video/fbdev/riva/fbdev.c b/drivers/video/fbdev/riva/fbdev.c > >> index 2ef26ad99341..6dc05da50609 100644 > >> --- a/drivers/video/fbdev/riva/fbdev.c > >> +++ b/drivers/video/fbdev/riva/fbdev.c > >> @@ -343,7 +343,8 @@ static void riva_bl_init(struct riva_par *par) > >> props.type = BACKLIGHT_RAW; > >> props.max_brightness = FB_BACKLIGHT_LEVELS - 1; > >> bd = backlight_device_register(name, info->dev, par, &riva_bl_ops, > >> - &props); > >> + &props, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bd)) { > >> info->bl_dev = NULL; > >> printk(KERN_WARNING "riva: Backlight registration failed\n"); > >> diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c > >> index 82c0a8caa9b8..2000ed98b380 100644 > >> --- a/drivers/video/fbdev/sh_mobile_lcdcfb.c > >> +++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c > >> @@ -2314,7 +2314,8 @@ static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent, > >> struct backlight_device *bl; > >> > >> bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch, > >> - &sh_mobile_lcdc_bl_ops, NULL); > >> + &sh_mobile_lcdc_bl_ops, NULL, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> dev_err(parent, "unable to register backlight device: %ld\n", > >> PTR_ERR(bl)); > >> diff --git a/drivers/video/fbdev/ssd1307fb.c b/drivers/video/fbdev/ssd1307fb.c > >> index a9c45c89b15e..a8a7ba4acde6 100644 > >> --- a/drivers/video/fbdev/ssd1307fb.c > >> +++ b/drivers/video/fbdev/ssd1307fb.c > >> @@ -673,7 +673,8 @@ static int ssd1307fb_probe(struct i2c_client *client, > >> > >> snprintf(bl_name, sizeof(bl_name), "ssd1307fb%d", info->node); > >> bl = backlight_device_register(bl_name, &client->dev, par, > >> - &ssd1307fb_bl_ops, NULL); > >> + &ssd1307fb_bl_ops, NULL, > >> + BACKLIGHT_REGISTER_FB_CLIENT); > >> if (IS_ERR(bl)) { > >> ret = PTR_ERR(bl); > >> dev_err(&client->dev, "unable to register backlight device: %d\n", > >> diff --git a/include/linux/backlight.h b/include/linux/backlight.h > >> index 5f2fd61ef4fb..79af3ccabeca 100644 > >> --- a/include/linux/backlight.h > >> +++ b/include/linux/backlight.h > >> @@ -129,13 +129,16 @@ static inline int backlight_update_status(struct backlight_device *bd) > >> return ret; > >> } > >> > >> +#define BACKLIGHT_REGISTER_FB_CLIENT 0x1 > >> extern struct backlight_device *backlight_device_register(const char *name, > >> struct device *dev, void *devdata, const struct backlight_ops *ops, > >> - const struct backlight_properties *props); > >> + const struct backlight_properties *props, > >> + unsigned long flags); > >> extern struct backlight_device *devm_backlight_device_register( > >> struct device *dev, const char *name, struct device *parent, > >> void *devdata, const struct backlight_ops *ops, > >> - const struct backlight_properties *props); > >> + const struct backlight_properties *props, > >> + unsigned long flags); > >> extern void backlight_device_unregister(struct backlight_device *bd); > >> extern void devm_backlight_device_unregister(struct device *dev, > >> struct backlight_device *bd); > >> -- > >> 2.8.1 > >> > >> _______________________________________________ > >> Intel-gfx mailing list > >> Intel-gfx@lists.freedesktop.org > >> https://lists.freedesktop.org/mailman/listinfo/intel-gfx > > -- > Jani Nikula, Intel Open Source Technology Center diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index ef921fa09a84..c990fe9cc0cf 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -401,16 +401,13 @@ int drm_connector_register_all(struct drm_device *dev) struct drm_connector *connector; int ret; - mutex_lock(&dev->mode_config.mutex); - - drm_for_each_connector(connector, dev) { + /* FIXME: taking the mode config mutex ends up in a clash with sysfs */ + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { ret = drm_connector_register(connector); if (ret) goto err; } - mutex_unlock(&dev->mode_config.mutex); - return 0; err: