From: Sonny Jiang <sonny.jiang@amd.com>
Date: Thu, 30 Apr 2015 21:12:14 +0000 (-0400)
Subject: drm/amdgpu fix amdgpu.dpm=0 (v2)
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=46651cc5dbee35dd2f25a02de328d3e7310ce64b;p=linux-beck.git

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 e56f54bf87d2..adf4dbc3f6a0 100644
--- 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);