commit 5a11a1ca0d0ed5be52070f1da8de89ef85941183
author Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Tue Feb 02 15:49:46 2021 +0300
committer Eric Blake <eblake@redhat.com> Mon Mar 08 15:14:12 2021 -0600
tree 189e7b6f8233c8daf9610be51cc02e15cc455d66
parent bc520249595845d387aa5b5e4eeeade673931a98

blockdev: fix drive_backup_prepare() missed error

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 <vsementsov@virtuozzo.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Message-Id: <20210202124956.63146-5-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>

blockdev.c

diff --git a/blockdev.c b/blockdev.c
index cd438e6..65884a2 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -1825,9 +1825,7 @@
     aio_context_acquire(aio_context);
 
     if (set_backing_hd) {
-        bdrv_set_backing_hd(target_bs, source, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
+        if (bdrv_set_backing_hd(target_bs, source, errp) < 0) {
             goto unref;
         }
     }