block: Fix error path in bdrv_backing_update_filename()
error_setg_errno() takes a positive errno code. Spotted by Coverity
(CID 1381628).
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
diff --git a/block.c b/block.c
index 684cb01..f641554 100644
--- a/block.c
+++ b/block.c
@@ -998,7 +998,7 @@
ret = bdrv_change_backing_file(parent, filename,
base->drv ? base->drv->format_name : "");
if (ret < 0) {
- error_setg_errno(errp, ret, "Could not update backing file link");
+ error_setg_errno(errp, -ret, "Could not update backing file link");
}
if (!(orig_flags & BDRV_O_RDWR)) {
