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| author | Nico Erfurth <ne@erfurth.eu> | 2011-11-08 07:30:40 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-11-08 12:37:07 -0500 |
| commit | ea1649dea95fb270af94f75e842402c4cfbfc15f (patch) | |
| tree | 89ae265b530926e13d6ea26bf34e5a03544c4d93 | |
| parent | c457338d7acd3823e765b684a62294cfda9d2f55 (diff) | |
| download | blackbird-op-linux-ea1649dea95fb270af94f75e842402c4cfbfc15f.tar.gz blackbird-op-linux-ea1649dea95fb270af94f75e842402c4cfbfc15f.zip | |
Fix incorrect usage of NET_IP_ALIGN
The driver used NET_IP_ALIGN to remove some additional padding inside of
the rx_fixup function. On many architectures NET_IP_ALIGN defaults to 2
which removed the correct amount of bytes.
On MCORE2-machines commit ea812ca1b06113597adcd8e70c0f84a413d97544
introduces a change which sets NET_IP_ALIGN to 0 by default. Which
triggered the bug on these machines.
This fix introduces a new RXW_PADDING define and uses this instead of
NET_IP_ALIGN. The name was taken from the original SMSC7500 driver which
is provided by SMSC.
Signed-off-by: Nico Erfurth <ne@erfurth.eu>
Tested-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/usb/smsc75xx.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c index 22a7cf951e72..a5b9b12ef268 100644 --- a/drivers/net/usb/smsc75xx.c +++ b/drivers/net/usb/smsc75xx.c @@ -51,6 +51,7 @@ #define USB_VENDOR_ID_SMSC (0x0424) #define USB_PRODUCT_ID_LAN7500 (0x7500) #define USB_PRODUCT_ID_LAN7505 (0x7505) +#define RXW_PADDING 2 #define check_warn(ret, fmt, args...) \ ({ if (ret < 0) netdev_warn(dev->net, fmt, ##args); }) @@ -1088,13 +1089,13 @@ static int smsc75xx_rx_fixup(struct usbnet *dev, struct sk_buff *skb) memcpy(&rx_cmd_b, skb->data, sizeof(rx_cmd_b)); le32_to_cpus(&rx_cmd_b); - skb_pull(skb, 4 + NET_IP_ALIGN); + skb_pull(skb, 4 + RXW_PADDING); packet = skb->data; /* get the packet length */ - size = (rx_cmd_a & RX_CMD_A_LEN) - NET_IP_ALIGN; - align_count = (4 - ((size + NET_IP_ALIGN) % 4)) % 4; + size = (rx_cmd_a & RX_CMD_A_LEN) - RXW_PADDING; + align_count = (4 - ((size + RXW_PADDING) % 4)) % 4; if (unlikely(rx_cmd_a & RX_CMD_A_RED)) { netif_dbg(dev, rx_err, dev->net, |
