[Qemu-block] [PATCH] mirror: hold aio_context before bdrv_drain

[Bin Wu]

From: Bin Wu <wu.wu...@huawei.com>

Signed-off-by: Bin Wu <wu.wu...@huawei.com>
---
 block/mirror.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/block/mirror.c b/block/mirror.c
index 4056164..08372df 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -530,7 +530,9 @@ static void coroutine_fn mirror_run(void *opaque)
              * mirror_populate runs.
              */
             trace_mirror_before_drain(s, cnt);
+            aio_context_acquire(bdrv_get_aio_context(bs));
             bdrv_drain(bs);
+            aio_context_release(bdrv_get_aio_context(bs));
             cnt = bdrv_get_dirty_count(bs, s->dirty_bitmap);
         }
 
-- 
1.7.12.4