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-rw-r--r--drivers/gpu/drm/i915/i915_drv.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 23a1afd2f7ca..9a9372a42c97 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -2046,6 +2046,7 @@ i915_gem_request_reference(struct drm_i915_gem_request *req)
static inline void
i915_gem_request_unreference(struct drm_i915_gem_request *req)
{
+ WARN_ON(!mutex_is_locked(&req->ring->dev->struct_mutex));
kref_put(&req->ref, i915_gem_request_free);
}