From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Thu, 4 Oct 2012 23:28:17 +0000 (-0700)
Subject: NFSv4.1: Deal with seqid wraparound in the pNFS return-on-close code
X-Git-Tag: upstream/snapshot3+hdmi~6478^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0f35ad6f688e9b7bcaa918a42130695822906f11;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

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 de82725..42613bd 100644
--- 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);
 }