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| author | Isaku Yamahata <yamahata@valinux.co.jp> | 2008-10-14 17:50:42 -0700 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2008-10-16 05:11:07 -0400 |
| commit | 617a20bbd099040b68f3578a0a1da5e8780d1831 (patch) | |
| tree | 28be551ea379012afea820e809591883c47f992e | |
| parent | 8ab7b66796920e785d27c88fcde1539fa661ae14 (diff) | |
| download | op-kernel-dev-617a20bbd099040b68f3578a0a1da5e8780d1831.zip op-kernel-dev-617a20bbd099040b68f3578a0a1da5e8780d1831.tar.gz | |
xen-netfront: Avoid unaligned accesses to IP header
Align ip header to a 16 byte boundary to avoid unaligned
access like other drivers.
Without this patch, xen-netfront doesn't work well on ia64.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
| -rw-r--r-- | drivers/net/xen-netfront.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index c749bdb..9ffe743 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -239,11 +239,14 @@ static void xennet_alloc_rx_buffers(struct net_device *dev) */ batch_target = np->rx_target - (req_prod - np->rx.rsp_cons); for (i = skb_queue_len(&np->rx_batch); i < batch_target; i++) { - skb = __netdev_alloc_skb(dev, RX_COPY_THRESHOLD, + skb = __netdev_alloc_skb(dev, RX_COPY_THRESHOLD + NET_IP_ALIGN, GFP_ATOMIC | __GFP_NOWARN); if (unlikely(!skb)) goto no_skb; + /* Align ip header to a 16 bytes boundary */ + skb_reserve(skb, NET_IP_ALIGN); + page = alloc_page(GFP_ATOMIC | __GFP_NOWARN); if (!page) { kfree_skb(skb); |
