drm/amdgpu: Fix a deadlock if previous GEM object allocation fails

Fall through to handle the error instead of return.

Fixes: f8aab604 ("drm/amdgpu: Initialise drm_gem_object_funcs for imported BOs")
Cc: stable@vger.kernel.org
Signed-off-by: xinhui pan <xinhui.pan@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -341,8 +341,7 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
 	r = amdgpu_gem_object_create(adev, size, args->in.alignment,
 				     initial_domain,
 				     flags, ttm_bo_type_device, resv, &gobj);
-	if (r) {
-		if (r != -ERESTARTSYS) {
+	if (r && r != -ERESTARTSYS) {
 		if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) {
 			flags &= ~AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED;
 			goto retry;
@@ -355,8 +354,6 @@ int amdgpu_gem_create_ioctl(struct drm_device *dev, void *data,
 		DRM_DEBUG("Failed to allocate GEM object (%llu, %d, %llu, %d)\n",
 				size, initial_domain, args->in.alignment, r);
 	}
-		return r;
-	}
 
 	if (flags & AMDGPU_GEM_CREATE_VM_ALWAYS_VALID) {
 		if (!r) {