drm/amdgpu: don't try to recreate sysfs entries on resume

Fixes an error on resume caused by:
fa022a9b65d2886486a022fd66b20c823cd76ad9

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

2 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6647fb26ef25..0d13e6368b96 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1654,6 +1654,7 @@ struct amdgpu_pm {
         u8                      fan_max_rpm;
         /* dpm */
         bool                    dpm_enabled;
+        bool                    sysfs_initialized;
         struct amdgpu_dpm       dpm;
         const struct firmware   *fw;    /* SMC firmware */
         uint32_t                fw_version;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index ed2bbe5b10af..22a8c7d3a3ab 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -695,6 +695,9 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
 {
         int ret;
 
+        if (adev->pm.sysfs_initialized)
+                return 0;
+
         if (adev->pm.funcs->get_temperature == NULL)
                 return 0;
         adev->pm.int_hwmon_dev = hwmon_device_register_with_groups(adev->dev,
@@ -723,6 +726,8 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
                 return ret;
         }
 
+        adev->pm.sysfs_initialized = true;
+
         return 0;
 }