Fixes: 7c83d7ab ("drm/amdgpu: Only update the CUR_SIZE register when
		necessary")
Signed-off-by: Flora Cui <Flora.Cui@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>