drm/amdgpu: move some release handles into fail labels (v2)

Clean up the codes to move the release handles into fail labels.

v2: squash in Christian's regression fix
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@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_ucode.c

@@ -250,32 +250,25 @@ int amdgpu_ucode_init_bo(struct amdgpu_device *adev)
 			       AMDGPU_GEM_DOMAIN_GTT, 0, NULL, NULL, bo);
 	if (err) {
 		dev_err(adev->dev, "(%d) Firmware buffer allocate failed\n", err);
-		err = -ENOMEM;
 		goto failed;
 	}
 
 	err = amdgpu_bo_reserve(*bo, false);
 	if (err) {
-		amdgpu_bo_unref(bo);
 		dev_err(adev->dev, "(%d) Firmware buffer reserve failed\n", err);
-		goto failed;
+		goto failed_reserve;
 	}
 
 	err = amdgpu_bo_pin(*bo, AMDGPU_GEM_DOMAIN_GTT, &fw_mc_addr);
 	if (err) {
-		amdgpu_bo_unreserve(*bo);
-		amdgpu_bo_unref(bo);
 		dev_err(adev->dev, "(%d) Firmware buffer pin failed\n", err);
-		goto failed;
+		goto failed_pin;
 	}
 
 	err = amdgpu_bo_kmap(*bo, &fw_buf_ptr);
 	if (err) {
 		dev_err(adev->dev, "(%d) Firmware buffer kmap failed\n", err);
-		amdgpu_bo_unpin(*bo);
-		amdgpu_bo_unreserve(*bo);
-		amdgpu_bo_unref(bo);
-		goto failed;
+		goto failed_kmap;
 	}
 
 	amdgpu_bo_unreserve(*bo);
@@ -290,9 +283,15 @@ int amdgpu_ucode_init_bo(struct amdgpu_device *adev)
 			fw_offset += ALIGN(le32_to_cpu(header->ucode_size_bytes), PAGE_SIZE);
 		}
 	}
+	return 0;
 
+failed_kmap:
+	amdgpu_bo_unpin(*bo);
+failed_pin:
+	amdgpu_bo_unreserve(*bo);
+failed_reserve:
+	amdgpu_bo_unref(bo);
 failed:
-	if (err)
 	adev->firmware.smu_load = false;
 
 	return err;