From: Steve Dickson <SteveD@redhat.com>
Date: Wed, 27 Oct 2010 20:01:20 -0400
Subject: [fs] nfs: fix regression in NFS Direct I/O path
Message-id: <1288209680-5543-1-git-send-email-steved@redhat.com>
Patchwork-id: 28961
O-Subject: [RHEL5.6 PATCH] [bz 647297] Fixed Regression in NFS Direct I/O path
Bugzilla: 647297
RH-Acked-by: Jeff Moyer <jmoyer@redhat.com>
RH-Acked-by: J. Bruce Fields <bfields@redhat.com>
RH-Acked-by: Jeff Layton <jlayton@redhat.com>
RH-Acked-by: David S. Miller <davem@redhat.com>

A typo, introduced by commit f11ac8db, in the nfs_direct_write()
routine causes writes with O_DIRECT set to fail with a ENOMEM error.

Found-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve Dickson <steved@redhat.com>

diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 034f401..83aaf42 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -726,7 +726,7 @@ static ssize_t nfs_direct_write(struct kiocb *iocb, unsigned long user_addr, siz
 	dreq->inode = inode;
 	dreq->ctx = get_nfs_open_context((struct nfs_open_context *)iocb->ki_filp->private_data);
 	dreq->l_ctx = nfs_get_lock_context(dreq->ctx);
-	if (dreq->l_ctx != NULL)
+	if (dreq->l_ctx == NULL)
 		goto out_release;
 	if (!is_sync_kiocb(iocb))
 		dreq->iocb = iocb;