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quorum: fix segfault when read fails in fifo mode

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Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Changlong Xie <xiecl.fnst@cn.fujitsu.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Changlong Xie 2016-02-05 10:25:22 +08:00 committed by Kevin Wolf
parent 2875645b65
commit f38738e212
1 changed files with 2 additions and 1 deletions
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3
block/quorum.c
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@ -286,7 +286,8 @@ static void quorum_aio_cb(void *opaque, int ret)
if (acb->is_read && s->read_pattern == QUORUM_READ_PATTERN_FIFO) {
/* We try to read next child in FIFO order if we fail to read */
if (ret < 0 && ++acb->child_iter < s->num_children) {
if (ret < 0 && (acb->child_iter + 1) < s->num_children) {
acb->child_iter++;
read_fifo_child(acb);
return;
}