From: Rex Zhu <Rex.Zhu@amd.com>
Date: Fri, 20 Jan 2017 06:30:51 +0000 (+0800)
Subject: drm/amdgpu: fix kernel panic when dpm disabled on Kv.
X-Git-Tag: v4.14-rc1~1422^2~31^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8485b5e1876b46d7c4f63a2cfcec2ee30362a207;p=platform%2Fkernel%2Flinux-rpi3.git

drm/amdgpu: fix kernel panic when dpm disabled on Kv.

Return early if it's disabled.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c
index 6b6476d..8785ca5 100644
--- a/drivers/gpu/drm/amd/amdgpu/kv_dpm.c
+++ b/drivers/gpu/drm/amd/amdgpu/kv_dpm.c
@@ -3079,6 +3079,9 @@ static int kv_dpm_hw_init(void *handle)
 	int ret;
 	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 
+	if (!amdgpu_dpm)
+		return 0;
+
 	mutex_lock(&adev->pm.mutex);
 	kv_dpm_setup_asic(adev);
 	ret = kv_dpm_enable(adev);