From 9ec2faa373e12455a6b382f2b3af3dc82389999f Mon Sep 17 00:00:00 2001
From: jan <jan@openbsd.org>
Date: Fri, 16 Aug 2024 13:02:44 +0000
Subject: [PATCH] vio(4): Don't set IPv4 checksum OK flag for rx packets.

The virtio specification just address TCP/UDP checksum offloading.
Thus, we have to check the IPv4 checksum in our stack.

ok sf@
---
 sys/dev/pv/if_vio.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/sys/dev/pv/if_vio.c b/sys/dev/pv/if_vio.c
index e6168ca3823..49013140134 100644
--- a/sys/dev/pv/if_vio.c
+++ b/sys/dev/pv/if_vio.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: if_vio.c,v 1.45 2024/08/01 11:13:19 sf Exp $	*/
+/*	$OpenBSD: if_vio.c,v 1.46 2024/08/16 13:02:44 jan Exp $	*/
 
 /*
  * Copyright (c) 2012 Stefan Fritsch, Alexander Fiveg.
@@ -1133,9 +1133,6 @@ vio_rx_offload(struct mbuf *m, struct virtio_net_hdr *hdr)
 
 	ether_extract_headers(m, &ext);
 
-	if (ext.ip4)
-		SET(m->m_pkthdr.csum_flags, M_IPV4_CSUM_IN_OK);
-
 	if (ext.tcp) {
 		SET(m->m_pkthdr.csum_flags, M_TCP_CSUM_IN_OK);
 		if (ISSET(hdr->flags, VIRTIO_NET_HDR_F_NEEDS_CSUM))
-- 
2.20.1