[Qemu-devel] [PATCH] block: use drained section in bdrv_close

[Paolo Bonzini <pbonzini@redhat.com>]

bdrv_close is used when ejecting a medium.  Use a drained section to ensure
that all I/O goes to either the old medium or the bitbucket.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 block.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block.c b/block.c
index 411edbf..01655de 100644
--- a/block.c
+++ b/block.c
@@ -2154,9 +2154,10 @@ void bdrv_close(BlockDriverState *bs)
         bdrv_io_limits_disable(bs);
     }
 
-    bdrv_drain(bs); /* complete I/O */
+    bdrv_drained_begin(bs); /* complete I/O */
     bdrv_flush(bs);
     bdrv_drain(bs); /* in case flush left pending I/O */
+
     notifier_list_notify(&bs->close_notifiers, bs);
 
     if (bs->blk) {
@@ -2206,6 +2207,7 @@ void bdrv_close(BlockDriverState *bs)
         g_free(ban);
     }
     QLIST_INIT(&bs->aio_notifiers);
+    bdrv_drained_end(bs);
 }
 
 void bdrv_close_all(void)
-- 
2.5.0