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block: fix qcow2_co_flush deadlock 

If qcow2_cache_flush failed, s->lock will not be unlock.

Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Dong Xu Wang 2011-10-27 17:22:28 +08:00 committed by Kevin Wolf
parent 08ae330e17
commit c95de7e2c4
1 changed files with 2 additions and 0 deletions
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2
block/qcow2.c
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@ -1113,11 +1113,13 @@ static int qcow2_co_flush(BlockDriverState *bs)
qemu_co_mutex_lock(&s->lock);
ret = qcow2_cache_flush(bs, s->l2_table_cache);
if (ret < 0) {
qemu_co_mutex_unlock(&s->lock);
return ret;
}
ret = qcow2_cache_flush(bs, s->refcount_block_cache);
if (ret < 0) {
qemu_co_mutex_unlock(&s->lock);
return ret;
}
qemu_co_mutex_unlock(&s->lock);