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vvfat: make it thread-safe 

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170629132749.997-6-pbonzini@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-06-29 15:27:43 +02:00 committed by Fam Zheng
parent 778b087e51
commit 254aee4dbb
1 changed files with 7 additions and 1 deletions
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8
block/vvfat.c
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@ -3078,8 +3078,14 @@ static int coroutine_fn
write_target_commit(BlockDriverState *bs, uint64_t offset, uint64_t bytes,
QEMUIOVector *qiov, int flags)
{
int ret;
BDRVVVFATState* s = *((BDRVVVFATState**) bs->opaque);
return try_commit(s);
qemu_co_mutex_lock(&s->lock);
ret = try_commit(s);
qemu_co_mutex_unlock(&s->lock);
return ret;
}
static void write_target_close(BlockDriverState *bs) {