diff options
| author | Hawking Zhang <Hawking.Zhang@amd.com> | 2020-09-05 23:11:17 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2020-11-13 00:14:43 -0500 |
| commit | a9f5f98f796ee93a865b9886bf7cb694cf124eb5 (patch) | |
| tree | 4c99a0b6b6ce89fd33c64de456cd6fc84814154a /drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | |
| parent | 3f66bf401e9fde1c35bb8b02dd7975659c40411d (diff) | |
drm/amdgpu: check hive pointer before access
in case it is an invalid one
Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c index 54c358e71f9a..541ef6be390f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c @@ -395,12 +395,17 @@ void amdgpu_put_xgmi_hive(struct amdgpu_hive_info *hive) int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate) { int ret = 0; - struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev); - struct amdgpu_device *request_adev = hive->hi_req_gpu ? - hive->hi_req_gpu : adev; + struct amdgpu_hive_info *hive; + struct amdgpu_device *request_adev; bool is_hi_req = pstate == AMDGPU_XGMI_PSTATE_MAX_VEGA20; - bool init_low = hive->pstate == AMDGPU_XGMI_PSTATE_UNKNOWN; + bool init_low; + + hive = amdgpu_get_xgmi_hive(adev); + if (!hive) + return 0; + request_adev = hive->hi_req_gpu ? hive->hi_req_gpu : adev; + init_low = hive->pstate == AMDGPU_XGMI_PSTATE_UNKNOWN; amdgpu_put_xgmi_hive(hive); /* fw bug so temporarily disable pstate switching */ return 0; |