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drm/amdgpu: Plus NULL function pointer check 

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Rex Zhu 2018-03-12 19:50:38 +08:00 committed by Alex Deucher
parent 8e68627958
commit 5771632723
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@ -1417,7 +1417,8 @@ static int amdgpu_device_ip_late_set_cg_state(struct amdgpu_device *adev)
continue;
/* skip CG for VCE/UVD, it's handled specially */
if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_UVD &&
adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE) {
adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE &&
adev->ip_blocks[i].version->funcs->set_clockgating_state) {
/* enable clockgating to save power */
r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
AMD_CG_STATE_GATE);
@ -1466,7 +1467,8 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
for (i = 0; i < adev->num_ip_blocks; i++) {
if (!adev->ip_blocks[i].status.hw)
continue;
if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC) {
if (adev->ip_blocks[i].version->type == AMD_IP_BLOCK_TYPE_SMC &&
adev->ip_blocks[i].version->funcs->set_clockgating_state) {
/* ungate blocks before hw fini so that we can shutdown the blocks safely */
r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
AMD_CG_STATE_UNGATE);
@ -1578,7 +1580,8 @@ int amdgpu_device_ip_suspend(struct amdgpu_device *adev)
if (!adev->ip_blocks[i].status.valid)
continue;
/* ungate blocks so that suspend can properly shut them down */
if (i != AMD_IP_BLOCK_TYPE_SMC) {
if (i != AMD_IP_BLOCK_TYPE_SMC &&
adev->ip_blocks[i].version->funcs->set_clockgating_state) {
r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
AMD_CG_STATE_UNGATE);
if (r) {