From 205ef7961f781496366e0a93a4ec621ad3724bd7 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Thu, 21 Oct 2010 16:43:43 +0200
Subject: block: Allow bdrv_flush to return errors

This changes bdrv_flush to return 0 on success and -errno in case of failure.
It's a requirement for implementing proper error handle in users of bdrv_flush.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
---
 block/cow.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'block/cow.c')

diff --git a/block/cow.c b/block/cow.c
index eedcc48772..4cf543c832 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -282,9 +282,9 @@ exit:
     return ret;
 }
 
-static void cow_flush(BlockDriverState *bs)
+static int cow_flush(BlockDriverState *bs)
 {
-    bdrv_flush(bs->file);
+    return bdrv_flush(bs->file);
 }
 
 static QEMUOptionParameter cow_create_options[] = {
-- 
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