diff options
Diffstat (limited to 'drivers/net/sky2.c')
| -rw-r--r-- | drivers/net/sky2.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index f5d697c0c03..99627524514 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -75,6 +75,7 @@ #define RX_LE_BYTES (RX_LE_SIZE*sizeof(struct sky2_rx_le)) #define RX_MAX_PENDING (RX_LE_SIZE/2 - 2) #define RX_DEF_PENDING RX_MAX_PENDING +#define RX_SKB_ALIGN 8 #define TX_RING_SIZE 512 #define TX_DEF_PENDING (TX_RING_SIZE - 1) @@ -905,15 +906,30 @@ static void sky2_vlan_rx_kill_vid(struct net_device *dev, unsigned short vid) #endif /* + * 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. + */ +static inline struct sk_buff *sky2_alloc_skb(unsigned int size, gfp_t gfp_mask) +{ + struct sk_buff *skb; + + skb = alloc_skb(size + RX_SKB_ALIGN, gfp_mask); + if (likely(skb)) { + unsigned long p = (unsigned long) skb->data; + skb_reserve(skb, + ((p + RX_SKB_ALIGN - 1) & ~(RX_SKB_ALIGN - 1)) - p); + } + + return skb; +} + +/* * Allocate and setup receiver buffer pool. * In case of 64 bit dma, there are 2X as many list elements * available as ring entries * and need to reserve one list element so we don't wrap around. - * - * 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. This means we can't use skb_reserve to align - * the IP header. */ static int sky2_rx_start(struct sky2_port *sky2) { @@ -929,7 +945,7 @@ static int sky2_rx_start(struct sky2_port *sky2) for (i = 0; i < sky2->rx_pending; i++) { struct ring_info *re = sky2->rx_ring + i; - re->skb = dev_alloc_skb(sky2->rx_bufsize); + re->skb = sky2_alloc_skb(sky2->rx_bufsize, GFP_KERNEL); if (!re->skb) goto nomem; @@ -1713,7 +1729,7 @@ static struct sk_buff *sky2_receive(struct sky2_port *sky2, } else { struct sk_buff *nskb; - nskb = dev_alloc_skb(sky2->rx_bufsize); + nskb = sky2_alloc_skb(sky2->rx_bufsize, GFP_ATOMIC); if (!nskb) goto resubmit; |