[PATCH 2/4] drm/amdgpu: Plus NULL function pointer check

[Rex Zhu]

Change-Id: Ifd6553646e7468bc935504075816074373e1d58d
Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 56b2245..d60ecc5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1415,12 +1415,14 @@ static int amdgpu_device_ip_late_set_cg_state(struct amdgpu_device *adev)
 		if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_UVD &&
 		    adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE) {
 			/* enable clockgating to save power */
-			r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
+			if (adev->ip_blocks[i].version->funcs->set_clockgating_state) {
+				r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
 										     AMD_CG_STATE_GATE);
-			if (r) {
-				DRM_ERROR("set_clockgating_state(gate) of IP block <%s> failed %d\n",
-					  adev->ip_blocks[i].version->funcs->name, r);
-				return r;
+				if (r) {
+					DRM_ERROR("set_clockgating_state(gate) of IP block <%s> failed %d\n",
+						adev->ip_blocks[i].version->funcs->name, r);
+					return r;
+				}
 			}
 		}
 	}
-- 
1.9.1