From 0527168522c25121bdd5d5f1d3c5b484d972ea14 Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Fri, 2 May 2008 21:50:45 -0500
Subject: [PATCH] virtio: fix scatterlist sizing in net driver.
Herbert Xu points out (within another patch) that my scatterlists are
too short: one entry for the gso header, one for the skb->data, and
MAX_SKB_FRAGS for all the fragments.
Fix both xmit and recv sides (recv currently unused, coming in later
patch).
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
drivers/net/virtio_net.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 1fd43e461ba5..fc7eeaa1f1b6 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -142,10 +142,10 @@ drop:
static void try_fill_recv(struct virtnet_info *vi)
{
struct sk_buff *skb;
- struct scatterlist sg[1+MAX_SKB_FRAGS];
+ struct scatterlist sg[2+MAX_SKB_FRAGS];
int num, err;
- sg_init_table(sg, 1+MAX_SKB_FRAGS);
+ sg_init_table(sg, 2+MAX_SKB_FRAGS);
for (;;) {
skb = netdev_alloc_skb(vi->dev, MAX_PACKET_LEN);
if (unlikely(!skb))
@@ -231,11 +231,11 @@ static int start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct virtnet_info *vi = netdev_priv(dev);
int num, err;
- struct scatterlist sg[1+MAX_SKB_FRAGS];
+ struct scatterlist sg[2+MAX_SKB_FRAGS];
struct virtio_net_hdr *hdr;
const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest;
- sg_init_table(sg, 1+MAX_SKB_FRAGS);
+ sg_init_table(sg, 2+MAX_SKB_FRAGS);
pr_debug("%s: xmit %p " MAC_FMT "\n", dev->name, skb,
dest[0], dest[1], dest[2],
--
2.34.1