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| author | Stephen Hemminger <shemminger@linux-foundation.org> | 2007-02-22 21:07:51 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2007-02-22 21:07:51 +0100 |
| commit | 4d12b6639bae991f592395da6895d02f11dd8ed9 (patch) | |
| tree | adea4c8d18c32b683a3eded8f6456f389aeb150e | |
| parent | 189b9a3bc90ecb79eb82ed4450db177aed7d292d (diff) | |
| download | kernel-common-4d12b6639bae991f592395da6895d02f11dd8ed9.tar.gz kernel-common-4d12b6639bae991f592395da6895d02f11dd8ed9.tar.bz2 kernel-common-4d12b6639bae991f592395da6895d02f11dd8ed9.zip | |
sky2: dual-port pci-x checksum fix
Add a workaround for dual port PCI-X card that returns status out of
order sometimes because of split transactions.
Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
| -rw-r--r-- | drivers/net/sky2.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 171443f9fc74..bc1d052f8f20 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1031,7 +1031,25 @@ static int sky2_up(struct net_device *dev) struct sky2_hw *hw = sky2->hw; unsigned port = sky2->port; u32 ramsize, rxspace; - int err = -ENOMEM; + int cap, err = -ENOMEM; + struct net_device *otherdev = hw->dev[sky2->port^1]; + + /* + * On dual port PCI-X card, there is an problem where status + * can be received out of order due to split transactions + */ + if (otherdev && netif_running(otherdev) && + (cap = pci_find_capability(hw->pdev, PCI_CAP_ID_PCIX))) { + struct sky2_port *osky2 = netdev_priv(otherdev); + u16 cmd; + + cmd = sky2_pci_read16(hw, cap + PCI_X_CMD); + cmd &= ~PCI_X_CMD_MAX_SPLIT; + sky2_pci_write16(hw, cap + PCI_X_CMD, cmd); + + sky2->rx_csum = 0; + osky2->rx_csum = 0; + } if (netif_msg_ifup(sky2)) printk(KERN_INFO PFX "%s: enabling interface\n", dev->name); |