drm/amdgpu fix amdgpu.dpm=0 (v2)

Fix crash when disabling dpm.

v2: agd5f: fix coding style, cleanup commit message

Signed-off-by: Sonny Jiang <sonny.jiang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/cz_dpm.c b/drivers/gpu/drm/amd/amdgpu/cz_dpm.c
index e56f54b..adf4dbc 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/cz_dpm.c
+++ b/drivers/gpu/drm/amd/amdgpu/cz_dpm.c
@@ -1206,10 +1206,7 @@ static int cz_dpm_enable(struct amdgpu_device *adev)
 
 static int cz_dpm_hw_init(struct amdgpu_device *adev)
 {
-       int ret;
-
-       if (!amdgpu_dpm)
-               return 0;
+       int ret = 0;
 
        mutex_lock(&adev->pm.mutex);
 
@@ -1229,6 +1226,12 @@ static int cz_dpm_hw_init(struct amdgpu_device *adev)
                return ret;
        }
 
+       if (!amdgpu_dpm) {
+               adev->pm.dpm_enabled = false;
+               mutex_unlock(&adev->pm.mutex);
+               return ret;
+       }
+
        /* cz dpm setup asic */
        cz_dpm_setup_asic(adev);
 
@@ -1326,6 +1329,12 @@ static int cz_dpm_resume(struct amdgpu_device *adev)
                return ret;
        }
 
+       if (!amdgpu_dpm) {
+               adev->pm.dpm_enabled = false;
+               mutex_unlock(&adev->pm.mutex);
+               return ret;
+       }
+
        /* cz dpm setup asic */
        cz_dpm_setup_asic(adev);