diff --git a/drivers/gpu/drm/i915/i915_gem_context.c b/drivers/gpu/drm/i915/i915_gem_context.c
index efa0ede5c6795411a99b8c8d8d50cbea531d980d..c81ae52c8c2eb433471b9c843e37044c9da088c5 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -463,6 +463,8 @@ int i915_switch_context(struct intel_ring_buffer *ring,
 	if (dev_priv->hw_contexts_disabled)
 		return 0;
 
+	WARN_ON(!mutex_is_locked(&dev_priv->dev->struct_mutex));
+
 	if (ring != &dev_priv->ring[RCS])
 		return 0;