diff options
| author | Uwe Kleine-Koenig <ukl@pengutronix.de> | 2008-12-12 11:18:54 +0100 |
|---|---|---|
| committer | Uwe Kleine-Koenig <ukl@pengutronix.de> | 2008-12-12 11:18:54 +0100 |
| commit | 7971db5a4b4176ad5df590fce07a962c643a2740 (patch) | |
| tree | 6ad8e09c5376c4e4c532c3411b0171ba1011acd9 /drivers/net/enc28j60.c | |
| parent | d403700bf8fc903584e830967f5d64075770848c (diff) | |
| parent | c4edfced662fa64deeed89c7d8c9f96d86130c19 (diff) | |
Merge branch 'for-rmk-misc' into for-rmk
Diffstat (limited to 'drivers/net/enc28j60.c')
| -rw-r--r-- | drivers/net/enc28j60.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c index e1b441effbb..c414554ac32 100644 --- a/drivers/net/enc28j60.c +++ b/drivers/net/enc28j60.c @@ -568,6 +568,17 @@ static u16 erxrdpt_workaround(u16 next_packet_ptr, u16 start, u16 end) return erxrdpt; } +/* + * Calculate wrap around when reading beyond the end of the RX buffer + */ +static u16 rx_packet_start(u16 ptr) +{ + if (ptr + RSV_SIZE > RXEND_INIT) + return (ptr + RSV_SIZE) - (RXEND_INIT - RXSTART_INIT + 1); + else + return ptr + RSV_SIZE; +} + static void nolock_rxfifo_init(struct enc28j60_net *priv, u16 start, u16 end) { u16 erxrdpt; @@ -938,8 +949,9 @@ static void enc28j60_hw_rx(struct net_device *ndev) skb->dev = ndev; skb_reserve(skb, NET_IP_ALIGN); /* copy the packet from the receive buffer */ - enc28j60_mem_read(priv, priv->next_pk_ptr + sizeof(rsv), - len, skb_put(skb, len)); + enc28j60_mem_read(priv, + rx_packet_start(priv->next_pk_ptr), + len, skb_put(skb, len)); if (netif_msg_pktdata(priv)) dump_packet(__func__, skb->len, skb->data); skb->protocol = eth_type_trans(skb, ndev); |