drm/i915: Don't clobber crtc->fb when queue_flip fails
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Fri, 22 Feb 2013 14:53:38 +0000 (16:53 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 5 Apr 2013 17:04:36 +0000 (10:04 -0700)
commit3c7fe7b4421b23733eddfb53167c78c0bee71169
treebb8658dff2d9603b67d47a62111db731cbd33ae7
parent49e67244a577002dcb37bbfdb0698a5306e769ec
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 3.4-stable. Adjusted context only.

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>
drivers/gpu/drm/i915/intel_display.c