drm/amd/pm: refine amdgpu pm sysfs node error code

v1:
Returns different error codes based on the scenario to help the user app understand
the AMDGPU device status when an exception occurs.

v2:
change -NODEV to -EBUSY.

Signed-off-by: Yang Wang <kevinyang.wang@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index 5230276628a342fb49033ffa6c08d189193984f0..96590c1da5534cc55f701fb2c3c2379d3842e5d1 100644 (file)
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -110,9 +110,10 @@ static int amdgpu_pm_dev_state_check(struct amdgpu_device *adev, bool runpm)
        bool runpm_check = runpm ? adev->in_runpm : false;
 
        if (amdgpu_in_reset(adev))
-               return -EPERM;
+               return -EBUSY;
+
        if (adev->in_suspend && !runpm_check)
-               return -EPERM;
+               return -EBUSY;
 
        return 0;
 }