drm/amdgpu: Skip put_reset_domain if it doesn't exist

For xgmi sriov, the reset is handled by host driver and hive->reset_domain
is not initialized so need to check if it exists before doing a put.
Signed-off-by: Vignesh Chander <Vignesh.Chander@amd.com>
Reviewed-by: Shaoyun Liu <Shaoyun.Liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h

@@ -113,7 +113,8 @@ static inline bool amdgpu_reset_get_reset_domain(struct amdgpu_reset_domain *dom
 
 static inline void amdgpu_reset_put_reset_domain(struct amdgpu_reset_domain *domain)
 {
-	kref_put(&domain->refcount, amdgpu_reset_destroy_reset_domain);
+	if (domain)
+		kref_put(&domain->refcount, amdgpu_reset_destroy_reset_domain);
 }
 
 static inline bool amdgpu_reset_domain_schedule(struct amdgpu_reset_domain *domain,