From patchwork Tue Feb 8 21:08:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 12739407 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 223ACC43217 for ; Tue, 8 Feb 2022 22:24:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1386518AbiBHWYI (ORCPT ); Tue, 8 Feb 2022 17:24:08 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35382 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1386728AbiBHVIv (ORCPT ); Tue, 8 Feb 2022 16:08:51 -0500 Received: from mail-wr1-x432.google.com (mail-wr1-x432.google.com [IPv6:2a00:1450:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66E41C0612BD for ; Tue, 8 Feb 2022 13:08:50 -0800 (PST) Received: by mail-wr1-x432.google.com with SMTP id w11so600830wra.4 for ; Tue, 08 Feb 2022 13:08:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=a7btPFkxjvf2mfzDClUDZxd+ZY9UWGCKfTqWfIAGZE4=; b=hC3hy+RQU0IwCFFhPrwVyJ7y2LIZTcjUzkEUlkvoHv0+/idoFt5rzVLYgDfL/hgQIi i2eeoFzpPEkt5fIvytjXjxYMYBVzGR7jyva3sSvlFHwg+sOFZrStM/ihrh+FHInpCE0T P8beATlmu3Ae4wYaareiwO9PDCh36eixaQNpw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=a7btPFkxjvf2mfzDClUDZxd+ZY9UWGCKfTqWfIAGZE4=; b=VtsjLCkY9yW2ADS+7bMN322Ku82EQtamI06JQ5WINXQnoovJeLGr7GzhVqB9gPEWgi fxk66pt5LY3p7+y9wzEXApc8zcyRWEQUJOFY7Jrq3lODXN2TkQBXR1D45T5haWbrf1FA XQOujFcjx7y4oxveKY0pIfPS84H7klMAkl9I/uD/wrPY8dUK/JoI1NUma5KsSfftzjG2 BmlJlac/14mrBQzwsdKJPA/3iVjZ9fClQl1wu2ZrzjEcPTeKElPrIVegEXtLBsk8CFxP t0lzWse4fz61p6gFddW4avvGSfaEbGDMFc1Y4ykSOwqQ2oD0og2NUY7px5H9TfHwg2R6 CWrg== X-Gm-Message-State: AOAM531z4Lxj0gJuQW/iwdTlAuyAuZc/BqE9yiZyfmfoymFNOQwR6kvR fKsD8G85L6fAYM04Sd/+iCCbKg== X-Google-Smtp-Source: ABdhPJxeKo6oxb1DStpx7vg2vbnJEG3khQpC5Pgmw0k9BwE0aQ7ghCQbgGVL5nA7XrrUJ87c2ZVJ6w== X-Received: by 2002:a5d:4528:: with SMTP id j8mr5046963wra.544.1644354528995; Tue, 08 Feb 2022 13:08:48 -0800 (PST) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id o14sm3033561wmr.3.2022.02.08.13.08.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Feb 2022 13:08:48 -0800 (PST) From: Daniel Vetter To: DRI Development Cc: Intel Graphics Development , linux-fbdev@vger.kernel.org, LKML , Daniel Vetter , Sam Ravnborg , kernel test robot , Daniel Vetter , Daniel Vetter , Greg Kroah-Hartman , Tetsuo Handa , Thomas Zimmermann , Claudio Suarez , Du Cheng Subject: [PATCH v2 11/19] fbcon: move more common code into fb_open() Date: Tue, 8 Feb 2022 22:08:16 +0100 Message-Id: <20220208210824.2238981-12-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220208210824.2238981-1-daniel.vetter@ffwll.ch> References: <20220208210824.2238981-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org No idea why con2fb_acquire_newinfo() initializes much less than fbcon_startup(), but so be it. From a quick look most of the un-initialized stuff should be fairly harmless, but who knows. Note that the error handling for the con2fb_acquire_newinfo() failure case was very strange: Callers updated con2fb_map to the new value before calling this function, but upon error con2fb_acquire_newinfo reset it to the old value. Since I removed the call to fbcon_release anyway that strange error path was sticking out like a sore thumb, hence I removed it. Which also allows us to remove the oldidx parameter from that function. v2: Explain what's going on with oldidx and error paths (Sam) v3: Drop unused variable (0day) Acked-by: Sam Ravnborg (v2) Cc: kernel test robot Signed-off-by: Daniel Vetter Cc: Daniel Vetter Cc: Greg Kroah-Hartman Cc: Tetsuo Handa Cc: Thomas Zimmermann Cc: Claudio Suarez Cc: Du Cheng Acked-by: Thomas Zimmermann --- drivers/video/fbdev/core/fbcon.c | 75 +++++++++++++------------------- 1 file changed, 30 insertions(+), 45 deletions(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index a60891005d44..f0213a0e3870 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -682,8 +682,18 @@ static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) #endif /* CONFIG_MISC_TILEBLITTING */ +static void fbcon_release(struct fb_info *info) +{ + if (info->fbops->fb_release) + info->fbops->fb_release(info, 0); + + module_put(info->fbops->owner); +} + static int fbcon_open(struct fb_info *info) { + struct fbcon_ops *ops; + if (!try_module_get(info->fbops->owner)) return -ENODEV; @@ -693,48 +703,31 @@ static int fbcon_open(struct fb_info *info) return -ENODEV; } - return 0; -} + ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); + if (!ops) { + fbcon_release(info); + return -ENOMEM; + } -static void fbcon_release(struct fb_info *info) -{ - if (info->fbops->fb_release) - info->fbops->fb_release(info, 0); + INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); + ops->info = info; + info->fbcon_par = ops; + ops->cur_blink_jiffies = HZ / 5; - module_put(info->fbops->owner); + return 0; } static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, - int unit, int oldidx) + int unit) { - struct fbcon_ops *ops = NULL; int err; err = fbcon_open(info); if (err) return err; - if (!err) { - ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); - if (!ops) - err = -ENOMEM; - - INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); - } - - if (!err) { - ops->cur_blink_jiffies = HZ / 5; - ops->info = info; - info->fbcon_par = ops; - - if (vc) - set_blitting_type(vc, info); - } - - if (err) { - con2fb_map[unit] = oldidx; - fbcon_release(info); - } + if (vc) + set_blitting_type(vc, info); return err; } @@ -842,9 +835,11 @@ static int set_con2fb_map(int unit, int newidx, int user) found = search_fb_in_map(newidx); - con2fb_map[unit] = newidx; - if (!err && !found) - err = con2fb_acquire_newinfo(vc, info, unit, oldidx); + if (!err && !found) { + err = con2fb_acquire_newinfo(vc, info, unit); + if (!err) + con2fb_map[unit] = newidx; + } /* * If old fb is not mapped to any of the consoles, @@ -941,20 +936,10 @@ static const char *fbcon_startup(void) if (fbcon_open(info)) return NULL; - ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); - if (!ops) { - fbcon_release(info); - return NULL; - } - - INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); - + ops = info->fbcon_par; ops->currcon = -1; ops->graphics = 1; ops->cur_rotate = -1; - ops->cur_blink_jiffies = HZ / 5; - ops->info = info; - info->fbcon_par = ops; p->con_rotate = initial_rotation; if (p->con_rotate == -1) @@ -1024,7 +1009,7 @@ static void fbcon_init(struct vc_data *vc, int init) return; if (!info->fbcon_par) - con2fb_acquire_newinfo(vc, info, vc->vc_num, -1); + con2fb_acquire_newinfo(vc, info, vc->vc_num); /* If we are not the first console on this fb, copy the font from that console */