From mboxrd@z Thu Jan  1 00:00:00 1970
From: Yosuke Iwamatsu <y-iwamatsu@ab.jp.nec.com>
Subject: [PATCH] ioemu: block-vbd: Fix vbd_aio_flush()
Date: Thu, 19 Feb 2009 19:44:46 +0900
Message-ID: <499D381E.7060604@ab.jp.nec.com>
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Call the completion function if flush features are not supported in blkfront. 

Signed-off-by: Yosuke Iwamatsu <y-iwamatsu@ab.jp.nec.com>

diff --git a/block-vbd.c b/block-vbd.c
index 4341259..129a1f5 100644
--- a/block-vbd.c
+++ b/block-vbd.c
@@ -261,7 +261,8 @@ static BlockDriverAIOCB *vbd_aio_flush(BlockDriverState *bs,
     BDRVVbdState *s = bs->opaque;
     VbdAIOCB *acb = NULL;
 
-    if (s->info.mode == O_RDONLY) {
+    if (s->info.mode == O_RDONLY ||
+        s->info.barrier != 1 || s->info.flush != 1) {
         cb(opaque, 0);
         return NULL;
     }