drm/radeon/uvd: Fix forgotten unmap buffer objects

After the buffer object is successfully mapped,
call radeon_bo_kunmap before the function returns.
Signed-off-by: zhanglianjie <zhanglianjie@uniontech.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon_uvd.c

@@ -497,6 +497,7 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
 	handle = msg[2];
 
 	if (handle == 0) {
+		radeon_bo_kunmap(bo);
 		DRM_ERROR("Invalid UVD handle!\n");
 		return -EINVAL;
 	}
@@ -559,12 +560,10 @@ static int radeon_uvd_cs_msg(struct radeon_cs_parser *p, struct radeon_bo *bo,
 		return 0;
 
 	default:
-
 		DRM_ERROR("Illegal UVD message type (%d)!\n", msg_type);
-		return -EINVAL;
 	}
 
-	BUG();
+	radeon_bo_kunmap(bo);
 	return -EINVAL;
 }