[PATCH 08/14] NFSv4: Hold the delegation spinlock when updating the seqid

[Trond Myklebust <trondmy@xxxxxxxxx>]

Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
 fs/nfs/delegation.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index b49faf1b3d91..d9c80871cecc 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -376,8 +376,10 @@ int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred,
 		/* Is this an update of the existing delegation? */
 		if (nfs4_stateid_match_other(&old_delegation->stateid,
 					&delegation->stateid)) {
+			spin_lock(&old_delegation->lock);
 			nfs_update_inplace_delegation(old_delegation,
 					delegation);
+			spin_unlock(&old_delegation->lock);
 			goto out;
 		}
 		/*
-- 
2.21.0