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pasemi_mac: Fix CRC checks

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Make sure we don't feed packets with bad CRC up the network stack,
and discount the packet length as reported from the MAC for the CRC
field.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Olof Johansson 2007-11-06 22:21:38 -06:00 committed by Jeff Garzik
parent dbd62af7de
commit 32bee77653
1 changed files with 13 additions and 3 deletions
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16
drivers/net/pasemi_mac.c
View file

@ -580,6 +580,16 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S;
pci_unmap_single(mac->dma_pdev, dma, len, PCI_DMA_FROMDEVICE);
if (macrx & XCT_MACRX_CRC) {
/* CRC error flagged */
mac->netdev->stats.rx_errors++;
mac->netdev->stats.rx_crc_errors++;
dev_kfree_skb_irq(skb);
goto next;
}
if (len < 256) {
struct sk_buff *new_skb;
@ -595,11 +605,10 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
} else
info->skb = NULL;
pci_unmap_single(mac->dma_pdev, dma, len, PCI_DMA_FROMDEVICE);
info->dma = 0;
skb_put(skb, len);
/* Don't include CRC */
skb_put(skb, len-4);
if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
@ -614,6 +623,7 @@ static int pasemi_mac_clean_rx(struct pasemi_mac *mac, int limit)
skb->protocol = eth_type_trans(skb, mac->netdev);
netif_receive_skb(skb);
next:
RX_RING(mac, n) = 0;
RX_RING(mac, n+1) = 0;