From 233c519fc9d981bd021d71d1164883b16d6bcc3f Mon Sep 17 00:00:00 2001
From: Kevin Wolf <kwolf@redhat.com>
Date: Tue, 14 Feb 2012 11:14:15 +0100
Subject: [PATCH 50/99] qcow: initialize coroutine mutex

RH-Author: Kevin Wolf <kwolf@redhat.com>
Message-id: <1329218101-24213-51-git-send-email-kwolf@redhat.com>
Patchwork-id: 37237
O-Subject: [RHEL-6.3 qemu-kvm PATCH v2 50/96] qcow: initialize coroutine mutex
Bugzilla: 783950
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Marcelo Tosatti <mtosatti@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>

From: Scott Wood <scottwood@freescale.com>

Bugzilla: 783950

commit 52b8eb60132b27ad53476490e9d7579003390cfa added a mutex,
but never initialized it.  This caused a segfault.

Reported-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit de33b1f3ddef8d6b4d53dbd4ae049262de2d3f02)
---
 block/qcow.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

Signed-off-by: Michal Novotny <minovotn@redhat.com>
---
 block/qcow.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/block/qcow.c b/block/qcow.c
index 1ec5241..b4c4d38 100644
--- a/block/qcow.c
+++ b/block/qcow.c
@@ -159,6 +159,8 @@ static int qcow_open(BlockDriverState *bs, int flags)
             goto fail;
         bs->backing_file[len] = '\0';
     }
+
+    qemu_co_mutex_init(&s->lock);
     return 0;
 
  fail:
-- 
1.7.7.5