Commit 05271685 authored by Rusty Russell's avatar Rusty Russell

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: default avatarRusty Russell <rusty@rustcorp.com.au>
parent cb38fa23
......@@ -142,10 +142,10 @@ static void receive_skb(struct net_device *dev, struct sk_buff *skb,
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],
......
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