drm/i915: Update the restrict check to filter out wrong Ring ID passed by user-space
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index b9dcc28..0aa1b4c 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1037,7 +1037,7 @@
if (args->flags & I915_EXEC_IS_PINNED)
flags |= I915_DISPATCH_PINNED;
- if ((args->flags & I915_EXEC_RING_MASK) > I915_NUM_RINGS) {
+ if ((args->flags & I915_EXEC_RING_MASK) > LAST_USER_RING) {
DRM_DEBUG("execbuf with unknown ring: %d\n",
(int)(args->flags & I915_EXEC_RING_MASK));
return -EINVAL;