diff --git a/[refs] b/[refs]
index 91930e81e122..a124dc31396c 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 4f83aa302f8f8b42397c6d3703d670f0588c03ec
+refs/heads/master: e518f0560a191269bd345178c899c790eb1ad4c8
diff --git a/trunk/fs/nfsd/nfs4state.c b/trunk/fs/nfsd/nfs4state.c
index c29b6ed2a0bb..1578d7a2667e 100644
--- a/trunk/fs/nfsd/nfs4state.c
+++ b/trunk/fs/nfsd/nfs4state.c
@@ -1588,6 +1588,10 @@ nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_sta
 		int err = get_write_access(inode);
 		if (err)
 			return nfserrno(err);
+		err = mnt_want_write(cur_fh->fh_export->ex_path.mnt);
+		if (err)
+			return nfserrno(err);
+		file_take_write(filp);
 	}
 	status = nfsd4_truncate(rqstp, cur_fh, open);
 	if (status) {