Commit 4a15cdbb authored by Ville Syrjälä's avatar Ville Syrjälä

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: 9b3b7841 ("drm/i915/overlay: Use VMA as the primary tracker for images")
Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1481131693-27993-2-git-send-email-ville.syrjala@linux.intel.comReviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
parent ecd9caa0
...@@ -840,8 +840,8 @@ static int intel_overlay_do_put_image(struct intel_overlay *overlay, ...@@ -840,8 +840,8 @@ static int intel_overlay_do_put_image(struct intel_overlay *overlay,
if (ret) if (ret)
goto out_unpin; goto out_unpin;
i915_gem_track_fb(overlay->vma->obj, new_bo, i915_gem_track_fb(overlay->vma ? overlay->vma->obj : NULL,
INTEL_FRONTBUFFER_OVERLAY(pipe)); vma->obj, INTEL_FRONTBUFFER_OVERLAY(pipe));
overlay->old_vma = overlay->vma; overlay->old_vma = overlay->vma;
overlay->vma = vma; overlay->vma = vma;
......
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