From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Tue, 27 Aug 2019 07:03:28 -0400
Subject: [PATCH] NFSv2: Fix write regression
Git-commit: d33d4beb522987d1c305c12500796f9be3687dee
Patch-mainline: v5.3
References: git-fixes

Ensure we update the write result count on success, since the
RPC call itself does not do so.

Reported-by: Jan Stancek <jstancek@redhat.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
Acked-by: NeilBrown <neilb@suse.com>

---
 fs/nfs/proc.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -610,8 +610,10 @@ static int nfs_proc_pgio_rpc_prepare(str
 
 static int nfs_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
 {
-	if (task->tk_status >= 0)
+	if (task->tk_status >= 0) {
+		hdr->res.count = hdr->args.count;
 		nfs_writeback_update_inode(hdr);
+	}
 	return 0;
 }