[PATCH v4 04/14] blockdev: fix drive_backup_prepare() missed error

[Vladimir Sementsov-Ogievskiy]

We leak local_err and don't report failure to the caller. It's
definitely wrong, let's fix.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Reviewed-by: Greg Kurz <gr...@kaod.org>
Reviewed-by: Alberto Garcia <be...@igalia.com>
---
 blockdev.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/blockdev.c b/blockdev.c
index 1c74490273..c70f3724d0 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1825,8 +1825,7 @@ static void drive_backup_prepare(BlkActionState *common, 
Error **errp)
     aio_context_acquire(aio_context);
 
     if (set_backing_hd) {
-        bdrv_set_backing_hd(target_bs, source, &local_err);
-        if (local_err) {
+        if (bdrv_set_backing_hd(target_bs, source, errp) < 0) {
             goto unref;
         }
     }
-- 
2.21.3