[PATCH Review 1/1] drm/amd/pm: use pm mutex to protect ecc info table

[Stanley.Yang]

Change-Id: I6afe0332cbb20528648c38665264930d6b091c2f
Signed-off-by: Stanley.Yang <Stanley.Yang at amd.com>
---
 drivers/gpu/drm/amd/pm/amdgpu_dpm.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index 9a892d6d1d7a..89fbee568be4 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -643,11 +643,16 @@ int amdgpu_dpm_get_ecc_info(struct amdgpu_device *adev,
 			    void *umc_ecc)
 {
 	struct smu_context *smu = adev->powerplay.pp_handle;
+	int ret = 0;
 
 	if (!is_support_sw_smu(adev))
 		return -EOPNOTSUPP;
 
-	return smu_get_ecc_info(smu, umc_ecc);
+	mutex_lock(&adev->pm.mutex);
+	ret = smu_get_ecc_info(smu, umc_ecc);
+	mutex_unlock(&adev->pm.mutex);
+
+	return ret;
 }
 
 struct amd_vce_state *amdgpu_dpm_get_vce_clock_state(struct amdgpu_device *adev,
-- 
2.17.1