Add error handling to propagate amdgpu_cgs_create_device() failures
to the caller. When amdgpu_cgs_create_device() fails, release hwmgr
and return -ENOMEM to prevent null pointer dereference.
[v1]->[v2]: Change error code from -EINVAL to -ENOMEM. Free hwmgr.
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
index 26624a716fc6..f8434158a402 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
@@ -51,6 +51,11 @@ static int amd_powerplay_create(struct amdgpu_device *adev)
hwmgr->adev = adev;
hwmgr->not_vf = !amdgpu_sriov_vf(adev);
hwmgr->device = amdgpu_cgs_create_device(adev);
+ if (!hwmgr->device) {
+ kfree(hwmgr);
+ return -ENOMEM;
+ }
+
mutex_init(&hwmgr->msg_lock);
hwmgr->chip_family = adev->family;
hwmgr->chip_id = adev->asic_type;
--
2.42.0.windows.2
