]> git.baikalelectronics.ru Git - kernel.git/commit
drm/i915: Fix oops in overlay due to frontbuffer tracking
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Wed, 7 Dec 2016 17:28:03 +0000 (19:28 +0200)
committerJani Nikula <jani.nikula@intel.com>
Tue, 3 Jan 2017 09:41:28 +0000 (11:41 +0200)
commit4be6431dc76329a512eace3ee40a18f57e100120
tree90dad5b633e0ef847934665fa952cdafd6f9cbb9
parent0cc3e904fbd36f9834ac982ebb511651b598af72
drm/i915: Fix oops in overlay due to frontbuffer tracking

The vma will be NULL if the overlay was previously off, so
dereferencing it will oops. Check for NULL before doing that.

Cc: stable@vger.kernel.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Fixes: b7bca067f86d ("drm/i915/overlay: Use VMA as the primary tracker for images")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1481131693-27993-2-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit 4a15cdbbc55463e55a7cdcf33f84ccc742ca9c29)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
drivers/gpu/drm/i915/intel_overlay.c