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authorStephen Hemminger <shemminger@linux-foundation.org>2007-09-19 15:36:42 -0700
committerJeff Garzik <jeff@garzik.org>2007-09-20 15:22:59 -0400
commitd6532232cd3de79c852685823a9c52f723816d0a (patch)
treeff6fc85a36020202709dfb915a60f6941585b9e7 /drivers/net/sky2.c
parent680e9fe9d69ea86e81c859932bfd751be91cc0e0 (diff)
downloadop-kernel-dev-d6532232cd3de79c852685823a9c52f723816d0a.zip
op-kernel-dev-d6532232cd3de79c852685823a9c52f723816d0a.tar.gz
sky2: fix VLAN receive processing (resend)
The length check for truncated frames was not correctly handling the case where VLAN acceleration had already read the tag. Also, the Yukon EX has some features that use high bit of status as security tag. Signed-off-by: Pierre-Yves Ritschard <pyr@spootnik.org> Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/sky2.c')
-rw-r--r--drivers/net/sky2.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 5d812de..8b15654 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -2103,6 +2103,13 @@ static struct sk_buff *sky2_receive(struct net_device *dev,
struct sky2_port *sky2 = netdev_priv(dev);
struct rx_ring_info *re = sky2->rx_ring + sky2->rx_next;
struct sk_buff *skb = NULL;
+ u16 count = (status & GMR_FS_LEN) >> 16;
+
+#ifdef SKY2_VLAN_TAG_USED
+ /* Account for vlan tag */
+ if (sky2->vlgrp && (status & GMR_FS_VLAN))
+ count -= VLAN_HLEN;
+#endif
if (unlikely(netif_msg_rx_status(sky2)))
printk(KERN_DEBUG PFX "%s: rx slot %u status 0x%x len %d\n",
@@ -2117,7 +2124,8 @@ static struct sk_buff *sky2_receive(struct net_device *dev,
if (!(status & GMR_FS_RX_OK))
goto resubmit;
- if (status >> 16 != length)
+ /* if length reported by DMA does not match PHY, packet was truncated */
+ if (length != count)
goto len_mismatch;
if (length < copybreak)
@@ -2133,6 +2141,10 @@ len_mismatch:
/* Truncation of overlength packets
causes PHY length to not match MAC length */
++sky2->net_stats.rx_length_errors;
+ if (netif_msg_rx_err(sky2) && net_ratelimit())
+ pr_info(PFX "%s: rx length mismatch: length %d status %#x\n",
+ dev->name, length, status);
+ goto resubmit;
error:
++sky2->net_stats.rx_errors;
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