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[PATCH V2] nbd: fix order of cleaning up the queue and freeing the tagset

From: Wang Qing <wangqing@vivo.com>

We must release the queue before freeing the tagset.

Fixes: 4af5f2e03013 ("nbd: use blk_mq_alloc_disk and blk_cleanup_disk")
Reported-and-tested-by: syzbot+9ca43ff47167c0ee3466@syzkaller.appspotmail.com
Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: Guoqing Jiang <jiangguoqing@kylinos.cn>
V2 changes: Correct the fixes tag and mail address.

 drivers/block/nbd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index b7d663736d35..c38317979f74 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -239,8 +239,8 @@ static void nbd_dev_remove(struct nbd_device *nbd)
 	if (disk) {
-		blk_mq_free_tag_set(&nbd->tag_set);
+		blk_mq_free_tag_set(&nbd->tag_set);

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