Commit a9f5f98f authored by Hawking Zhang's avatar Hawking Zhang Committed by Alex Deucher
Browse files

drm/amdgpu: check hive pointer before access 



in case it is an invalid one

Signed-off-by: default avatarHawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: default avatarKevin Wang <kevin1.wang@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 3f66bf40

drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c

+9 −4
Original line number Diff line number Diff line
@@ -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;