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| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2013-02-22 16:53:38 +0200 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-03-20 15:03:21 +0000 |
| commit | 0149797bb6d01648df71fed72b88591c75bca5a5 (patch) | |
| tree | c0950a64772bd5e99fd83fb8147bad7cba37b66b | |
| parent | e0179c31e0818d5efc87a475f2b83979ef2d3585 (diff) | |
| download | linux-stable-0149797bb6d01648df71fed72b88591c75bca5a5.tar.gz linux-stable-0149797bb6d01648df71fed72b88591c75bca5a5.tar.bz2 linux-stable-0149797bb6d01648df71fed72b88591c75bca5a5.zip | |
drm/i915: Don't clobber crtc->fb when queue_flip fails
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.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reported-and-Tested-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2303c2b1e065..45915827abf7 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7280,8 +7280,8 @@ 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; @@ -7293,8 +7293,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, work->event = event; work->dev = crtc->dev; - 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); @@ -7314,9 +7313,6 @@ 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; - mutex_lock(&dev->struct_mutex); /* Reference the objects for the scheduled work. */ @@ -7347,6 +7343,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, cleanup_pending: atomic_sub(1 << intel_crtc->plane, &work->old_fb_obj->pending_flip); + crtc->fb = old_fb; drm_gem_object_unreference(&work->old_fb_obj->base); drm_gem_object_unreference(&obj->base); mutex_unlock(&dev->struct_mutex); |