diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2013-02-22 16:53:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-04-05 09:26:15 -0700 |
| commit | 6c7db2bac62fc0b01ac35981144b05e355cbdb3e (patch) | |
| tree | 519879f7397d17b9829a40da84ee2ee16dad294d | |
| parent | 624f6b4da14474588eec8249f4d45344d05e0279 (diff) | |
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.
Backported for 3.8-stable. Restored an atomic_sub removed
in 3.9 ca9c46.
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>
Signed-off-by: Lingzhu Xiang <lxiang@redhat.com>
Reviewed-by: CAI Qian <caiqian@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 80aa1fc12f43..e6e4df7cb292 100644 --- 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 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; @@ -7446,8 +7446,7 @@ 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); @@ -7467,9 +7466,6 @@ 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); @@ -7507,6 +7503,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, 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); |