Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757406Ab3DBWmN (ORCPT ); Tue, 2 Apr 2013 18:42:13 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:33177 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761826Ab3DBWM5 (ORCPT ); Tue, 2 Apr 2013 18:12:57 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= , Chris Wilson , Daniel Vetter , Lingzhu Xiang , CAI Qian Subject: [ 089/124] drm/i915: Dont clobber crtc->fb when queue_flip fails Date: Tue, 2 Apr 2013 15:11:11 -0700 Message-Id: <20130402221114.445249119@linuxfoundation.org> X-Mailer: git-send-email 1.8.1.rc1.5.g7e0651a In-Reply-To: <20130402221104.163133110@linuxfoundation.org> References: <20130402221104.163133110@linuxfoundation.org> User-Agent: quilt/0.60-5.1.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2737 Lines: 78 3.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ville Syrjälä commit 4a35f83b2b7c6aae3fc0d1c4554fdc99dc33ad07 upstream. Restore crtc->fb to the old framebuffer if queue_flip fails. While at it, kill the pointless intel_fb temp variable. v2: Update crtc->fb before queue_flip and restore it back after a failure. Backported for 3.8-stable. Restored an atomic_sub removed in 3.9 ca9c46. Signed-off-by: Ville Syrjälä Reviewed-by: Chris Wilson Reported-and-Tested-by: Mika Kuoppala Signed-off-by: Daniel Vetter Signed-off-by: Lingzhu Xiang Reviewed-by: CAI Qian Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_display.c | 11 ++++------- 1 file changed, 4 insertions(+), 7 deletions(-) --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7420,8 +7420,8 @@ static int intel_crtc_page_flip(struct d { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; - struct intel_framebuffer *intel_fb; - struct drm_i915_gem_object *obj; + struct drm_framebuffer *old_fb = crtc->fb; + struct drm_i915_gem_object *obj = to_intel_framebuffer(fb)->obj; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_unpin_work *work; unsigned long flags; @@ -7446,8 +7446,7 @@ static int intel_crtc_page_flip(struct d work->event = event; work->crtc = crtc; - intel_fb = to_intel_framebuffer(crtc->fb); - work->old_fb_obj = intel_fb->obj; + work->old_fb_obj = to_intel_framebuffer(old_fb)->obj; INIT_WORK(&work->work, intel_unpin_work_fn); ret = drm_vblank_get(dev, intel_crtc->pipe); @@ -7467,9 +7466,6 @@ static int intel_crtc_page_flip(struct d intel_crtc->unpin_work = work; spin_unlock_irqrestore(&dev->event_lock, flags); - intel_fb = to_intel_framebuffer(fb); - obj = intel_fb->obj; - if (atomic_read(&intel_crtc->unpin_work_count) >= 2) flush_workqueue(dev_priv->wq); @@ -7507,6 +7503,7 @@ static int intel_crtc_page_flip(struct d cleanup_pending: atomic_dec(&intel_crtc->unpin_work_count); + crtc->fb = old_fb; atomic_sub(1 << intel_crtc->plane, &work->old_fb_obj->pending_flip); drm_gem_object_unreference(&work->old_fb_obj->base); drm_gem_object_unreference(&obj->base); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/