From patchwork Fri May 25 18:50:35 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Ville Syrjala X-Patchwork-Id: 10428297 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 41727602D8 for ; Fri, 25 May 2018 18:51:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 29DF0297A3 for ; Fri, 25 May 2018 18:51:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1E6A0297A5; Fri, 25 May 2018 18:51:11 +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=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 98B9C297A3 for ; Fri, 25 May 2018 18:51:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9C9216EABC; Fri, 25 May 2018 18:51:09 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by gabe.freedesktop.org (Postfix) with ESMTPS id E53826EABC; Fri, 25 May 2018 18:51:07 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 May 2018 11:51:07 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,440,1520924400"; d="scan'208";a="52218368" Received: from stinkbox.fi.intel.com (HELO stinkbox) ([10.237.72.174]) by FMSMGA003.fm.intel.com with SMTP; 25 May 2018 11:51:04 -0700 Received: by stinkbox (sSMTP sendmail emulation); Fri, 25 May 2018 21:51:03 +0300 From: Ville Syrjala To: dri-devel@lists.freedesktop.org Date: Fri, 25 May 2018 21:50:35 +0300 Message-Id: <20180525185045.29689-4-ville.syrjala@linux.intel.com> X-Mailer: git-send-email 2.16.1 In-Reply-To: <20180525185045.29689-1-ville.syrjala@linux.intel.com> References: <20180525185045.29689-1-ville.syrjala@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v2 03/13] drm/vmwgfx: Stop using plane->fb in vmw_kms_update_implicit_fb() X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Thomas Hellstrom , Sinclair Yeh , Daniel Vetter , intel-gfx@lists.freedesktop.org, VMware Graphics , Deepak Rawat Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP From: Ville Syrjälä The only caller of vmw_kms_update_implicit_fb() is the page_flip hook which itself gets called with the plane mutex already held. Hence we can look at plane->state safely. Toss in a lockdep assert to make the situation more clear. Cc: Deepak Rawat Cc: Thomas Hellstrom Cc: Sinclair Yeh Cc: VMware Graphics Cc: Daniel Vetter Signed-off-by: Ville Syrjälä Reviewed-by: Deepak Rawat --- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 5417eb1b486e..04d51bb639b8 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -2813,14 +2813,17 @@ void vmw_kms_update_implicit_fb(struct vmw_private *dev_priv, struct drm_crtc *crtc) { struct vmw_display_unit *du = vmw_crtc_to_du(crtc); + struct drm_plane *plane = crtc->primary; struct vmw_framebuffer *vfb; + lockdep_assert_held(&plane->mutex); + mutex_lock(&dev_priv->global_kms_state_mutex); if (!du->is_implicit) goto out_unlock; - vfb = vmw_framebuffer_to_vfb(crtc->primary->fb); + vfb = vmw_framebuffer_to_vfb(plane->state->fb); WARN_ON_ONCE(dev_priv->num_implicit != 1 && dev_priv->implicit_fb != vfb);