The patch below does not apply to the 3.8-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.
thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 4a35f83b2b7c6aae3fc0d1c4554fdc99dc33ad07 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <[email protected]> Date: Fri, 22 Feb 2013 16:53:38 +0200 Subject: [PATCH] drm/i915: Don't clobber crtc->fb when queue_flip fails MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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. Cc: [email protected] Signed-off-by: Ville Syrjälä <[email protected]> Reviewed-by: Chris Wilson <[email protected]> Reported-and-Tested-by: Mika Kuoppala <[email protected]> Signed-off-by: Daniel Vetter <[email protected]> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0ff10b3..09659ff 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7264,8 +7264,8 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, { 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; @@ -7290,8 +7290,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, 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); @@ -7311,9 +7310,6 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, 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); @@ -7348,6 +7344,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, cleanup_pending: atomic_dec(&intel_crtc->unpin_work_count); + crtc->fb = old_fb; drm_gem_object_unreference(&work->old_fb_obj->base); drm_gem_object_unreference(&obj->base); mutex_unlock(&dev->struct_mutex); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
