The code to handle cloned skb overwriting is unnecessary in the
sky2 driver and is buggy. The bug is that pskb_expand_head can change the
skb but the driver has already mapped in the header.
Since the sky2 hardware doesn't need to overwrite memory, the buggy
code can just be removed; it was mistakenly copied from the tg3
driver.
Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]>
--- sky2.orig/drivers/net/sky2.c 2006-08-25 16:00:28.000000000 -0700
+++ sky2/drivers/net/sky2.c 2006-08-25 16:01:33.000000000 -0700
@@ -1239,13 +1239,6 @@
/* Check for TCP Segmentation Offload */
mss = skb_shinfo(skb)->gso_size;
if (mss != 0) {
- /* just drop the packet if non-linear expansion fails */
- if (skb_header_cloned(skb) &&
- pskb_expand_head(skb, 0, 0, GFP_ATOMIC)) {
- dev_kfree_skb(skb);
- goto out_unlock;
- }
-
mss += ((skb->h.th->doff - 5) * 4); /* TCP options */
mss += (skb->nh.iph->ihl * 4) + sizeof(struct tcphdr);
mss += ETH_HLEN;
@@ -1341,7 +1334,6 @@
sky2_put_idx(hw, txqaddr[sky2->port], sky2->tx_prod);
-out_unlock:
spin_unlock(&sky2->tx_lock);
dev->trans_start = jiffies;
--
Stephen Hemminger <[EMAIL PROTECTED]>
-
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