From b2df7531f3adc4f0f65067b917cef8c66ba812c5 Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Wed, 27 Oct 2010 13:04:15 +0200
Subject: [PATCH] ide: Handle immediate bdrv_aio_flush failure

If bdrv_aio_flush returns NULL, this should be treated as an error.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 hw/ide/core.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/hw/ide/core.c b/hw/ide/core.c
index bc3e91658a..484e0ca96f 100644
--- a/hw/ide/core.c
+++ b/hw/ide/core.c
@@ -811,10 +811,16 @@ static void ide_flush_cb(void *opaque, int ret)
 
 static void ide_flush_cache(IDEState *s)
 {
-    if (s->bs) {
-        bdrv_aio_flush(s->bs, ide_flush_cb, s);
-    } else {
+    BlockDriverAIOCB *acb;
+
+    if (s->bs == NULL) {
         ide_flush_cb(s, 0);
+        return;
+    }
+
+    acb = bdrv_aio_flush(s->bs, ide_flush_cb, s);
+    if (acb == NULL) {
+        ide_flush_cb(s, -EIO);
     }
 }