[PATCH] drm/amdgpu: handle amdgpu_cgs_create_device() errors in amd_powerplay_create()

[Wentao Liang]

Add error handling to propagate amdgpu_cgs_create_device() failures
to the caller. When amdgpu_cgs_create_device() fails, immediately
return -EINVAL to stop further processing and prevent null pointer
dereference.

Signed-off-by: Wentao Liang <vu...@iscas.ac.cn>
---
 drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c | 2 ++
 1 file changed, 2 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..2cb05614466f 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
@@ -51,6 +51,8 @@ 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)
+               return -EINVAL;
        mutex_init(&hwmgr->msg_lock);
        hwmgr->chip_family = adev->family;
        hwmgr->chip_id = adev->asic_type;
-- 
2.42.0.windows.2