On 2/15/22 20:53, Vladimir Sementsov-Ogievskiy wrote:

Reviewed-by: Nikita Lapshin<nikita.laps...@virtuozzo.com>

At the end we ignore failure of bdrv_merge_dirty_bitmap() and report
success. And still set errp. That's wrong.

Signed-off-by: Vladimir Sementsov-Ogievskiy<vsement...@virtuozzo.com>
---
  block/monitor/bitmap-qmp-cmds.c | 5 ++++-
  1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/block/monitor/bitmap-qmp-cmds.c b/block/monitor/bitmap-qmp-cmds.c
index 83970b22fa..a94aaa9fb3 100644
--- a/block/monitor/bitmap-qmp-cmds.c
+++ b/block/monitor/bitmap-qmp-cmds.c
@@ -303,7 +303,10 @@ BdrvDirtyBitmap *block_dirty_bitmap_merge(const char 
*node, const char *target,
      }
/* Merge into dst; dst is unchanged on failure. */
-    bdrv_merge_dirty_bitmap(dst, anon, backup, errp);
+    if (!bdrv_merge_dirty_bitmap(dst, anon, backup, errp)) {
+        dst = NULL;
+        goto out;
+    }
out:
      bdrv_release_dirty_bitmap(anon);

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