The intention in the original patch was to release the lock when
we put the inode, however something got screwed up.
Reported-by: NJason Yan <yanaijie@huawei.com>
Fixes: 7b410d9c ("pNFS: Delay getting the layout header in..")
Cc: stable@vger.kernel.org # v4.10+
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>