[PATCH] sky2: use netdev_alloc_skb
Use netdev_alloc_skb for buffer allocation to allow for headroom.
This prevents bugs in code paths that assume extra space at the
front and makes sky2 behave like other drivers.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 67ebc05..8d541bb 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -954,14 +954,16 @@
/*
* It appears the hardware has a bug in the FIFO logic that
* cause it to hang if the FIFO gets overrun and the receive buffer
- * is not aligned. ALso alloc_skb() won't align properly if slab
- * debugging is enabled.
+ * is not 64 byte aligned. The buffer returned from netdev_alloc_skb is
+ * aligned except if slab debugging is enabled.
*/
-static inline struct sk_buff *sky2_alloc_skb(unsigned int size, gfp_t gfp_mask)
+static inline struct sk_buff *sky2_alloc_skb(struct net_device *dev,
+ unsigned int length,
+ gfp_t gfp_mask)
{
struct sk_buff *skb;
- skb = alloc_skb(size + RX_SKB_ALIGN, gfp_mask);
+ skb = __netdev_alloc_skb(dev, length + RX_SKB_ALIGN, gfp_mask);
if (likely(skb)) {
unsigned long p = (unsigned long) skb->data;
skb_reserve(skb, ALIGN(p, RX_SKB_ALIGN) - p);
@@ -997,7 +999,8 @@
for (i = 0; i < sky2->rx_pending; i++) {
struct ring_info *re = sky2->rx_ring + i;
- re->skb = sky2_alloc_skb(sky2->rx_bufsize, GFP_KERNEL);
+ re->skb = sky2_alloc_skb(sky2->netdev, sky2->rx_bufsize,
+ GFP_KERNEL);
if (!re->skb)
goto nomem;
@@ -1829,15 +1832,16 @@
* For small packets or errors, just reuse existing skb.
* For larger packets, get new buffer.
*/
-static struct sk_buff *sky2_receive(struct sky2_port *sky2,
+static struct sk_buff *sky2_receive(struct net_device *dev,
u16 length, u32 status)
{
+ struct sky2_port *sky2 = netdev_priv(dev);
struct ring_info *re = sky2->rx_ring + sky2->rx_next;
struct sk_buff *skb = NULL;
if (unlikely(netif_msg_rx_status(sky2)))
printk(KERN_DEBUG PFX "%s: rx slot %u status 0x%x len %d\n",
- sky2->netdev->name, sky2->rx_next, status, length);
+ dev->name, sky2->rx_next, status, length);
sky2->rx_next = (sky2->rx_next + 1) % sky2->rx_pending;
prefetch(sky2->rx_ring + sky2->rx_next);
@@ -1848,11 +1852,11 @@
if (!(status & GMR_FS_RX_OK))
goto resubmit;
- if (length > sky2->netdev->mtu + ETH_HLEN)
+ if (length > dev->mtu + ETH_HLEN)
goto oversize;
if (length < copybreak) {
- skb = alloc_skb(length + 2, GFP_ATOMIC);
+ skb = netdev_alloc_skb(dev, length + 2);
if (!skb)
goto resubmit;
@@ -1867,7 +1871,7 @@
} else {
struct sk_buff *nskb;
- nskb = sky2_alloc_skb(sky2->rx_bufsize, GFP_ATOMIC);
+ nskb = sky2_alloc_skb(dev, sky2->rx_bufsize, GFP_ATOMIC);
if (!nskb)
goto resubmit;
@@ -1897,7 +1901,7 @@
if (netif_msg_rx_err(sky2) && net_ratelimit())
printk(KERN_INFO PFX "%s: rx error, status 0x%x length %d\n",
- sky2->netdev->name, status, length);
+ dev->name, status, length);
if (status & (GMR_FS_LONG_ERR | GMR_FS_UN_SIZE))
sky2->net_stats.rx_length_errors++;
@@ -1951,11 +1955,10 @@
switch (le->opcode & ~HW_OWNER) {
case OP_RXSTAT:
- skb = sky2_receive(sky2, length, status);
+ skb = sky2_receive(dev, length, status);
if (!skb)
break;
- skb->dev = dev;
skb->protocol = eth_type_trans(skb, dev);
dev->last_rx = jiffies;
