From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: Mon, 14 May 2018 15:34:36 +0000 (-0700)
Subject: net: nfs: don't fail when nfs_read_reply returns -NFS_RPC_DROP
X-Git-Tag: v2018.07-rc2~51^2~10
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=d48d40a09127dfcb1f073c3e44de4b858393ae9e;p=oweals%2Fu-boot.git

net: nfs: don't fail when nfs_read_reply returns -NFS_RPC_DROP

That can happen if duplicate UDP packet arrived, and that's not uncommon.
Anyway, we ignore packets with rpc_id lower than last we sent for other
requests, so it makes sense to do that for read request as well.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
---

diff --git a/net/nfs.c b/net/nfs.c
index 83ed0a7c37..9a16765ba1 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -822,6 +822,8 @@ static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 
 	case STATE_READ_REQ:
 		rlen = nfs_read_reply(pkt, len);
+		if (rlen == -NFS_RPC_DROP)
+			break;
 		net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
 		if (rlen > 0) {
 			nfs_offset += rlen;