NFS client bugfix for Linux 5.7

Bugfix:
 - Fix an RCU read lock leakage in pnfs_alloc_ds_commits_list()
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Merge tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfix from Trond Myklebust:
 "Fix an RCU read lock leakage in pnfs_alloc_ds_commits_list()"

* tag 'nfs-for-5.7-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  pNFS: Fix RCU lock leakage

fs/nfs/pnfs_nfs.c

@@ -501,6 +501,7 @@ pnfs_alloc_ds_commits_list(struct list_head *list,
 		rcu_read_lock();
 		pnfs_put_commit_array(array, cinfo->inode);
 	}
+	rcu_read_unlock();
 	return ret;
 }