diff --git a/drivers/gpu/drm/radeon/radeon_ring.c b/drivers/gpu/drm/radeon/radeon_ring.c
index 37093cea24c5..c3304c977a0a 100644
--- a/drivers/gpu/drm/radeon/radeon_ring.c
+++ b/drivers/gpu/drm/radeon/radeon_ring.c
@@ -218,6 +218,7 @@ void radeon_ring_undo(struct radeon_ring *ring)
 /**
  * radeon_ring_unlock_undo - reset the wptr and unlock the ring
  *
+ * @rdev:       radeon device structure
  * @ring: radeon_ring structure holding ring information
  *
  * Call radeon_ring_undo() then unlock the ring (all asics).
@@ -231,6 +232,7 @@ void radeon_ring_unlock_undo(struct radeon_device *rdev, struct radeon_ring *rin
 /**
  * radeon_ring_lockup_update - update lockup variables
  *
+ * @rdev:       radeon device structure
  * @ring: radeon_ring structure holding ring information
  *
  * Update the last rptr value and timestamp (all asics).
@@ -275,6 +277,7 @@ bool radeon_ring_test_lockup(struct radeon_device *rdev, struct radeon_ring *rin
  *
  * @rdev: radeon_device pointer
  * @ring: the ring we want to back up
+ * @data: placeholder for returned commit data
  *
  * Saves all unprocessed commits from a ring, returns the number of dwords saved.
  */