drm/amdgpu/debugfs: fix error code when smc register accessors are NULL

[ Upstream commit afe58346d5 ]

Should be -EOPNOTSUPP.

Fixes: 5104fdf50d ("drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alex Deucher 2023-11-27 17:26:29 -05:00 • committed by Greg Kroah-Hartman
commit 591e77fedc