NFSv4.1: Deal with seqid wraparound in the pNFS return-on-close code

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index de827251bdac192863eb6951b0556b948ecdfce1..42613bd19f8e77dcfe4d4b7803c0d7969c4f1354 100644 (file)
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -801,7 +801,7 @@ void pnfs_roc_set_barrier(struct inode *ino, u32 barrier)
 
        spin_lock(&ino->i_lock);
        lo = NFS_I(ino)->layout;
-       if ((int)(barrier - lo->plh_barrier) > 0)
+       if (pnfs_seqid_is_newer(barrier, lo->plh_barrier))
                lo->plh_barrier = barrier;
        spin_unlock(&ino->i_lock);
 }