From: Stephen Hemminger <shemminger@linux-foundation.org>
Date: Wed, 21 Nov 2007 22:55:26 +0000 (-0800)
Subject: sky2: disable rx checksum on Yukon XL
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8b31cfbcd1b54362ef06c85beb40e65a349169a2;p=linux-beck.git

sky2: disable rx checksum on Yukon XL

The Marvell Yukon XL chipset appears to have a hardware glitch
where it will repeat the checksum of the last packet. Of course, this is
timing sensitive and only happens sometimes...

More info: http://bugzilla.kernel.org/show_bug.cgi?id=9381

As a workaround just disable hardware checksumming by default on
this chip version. The earlier workaround for PCIX, dual port
was also on Yukon XL so don't need to disable checksumming there.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index a2070db725c9..8c4c7430d906 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -1320,15 +1320,11 @@ static int sky2_up(struct net_device *dev)
 	 */
 	if (otherdev && netif_running(otherdev) &&
  	    (cap = pci_find_capability(hw->pdev, PCI_CAP_ID_PCIX))) {
- 		struct sky2_port *osky2 = netdev_priv(otherdev);
  		u16 cmd;
 
 		pci_read_config_word(hw->pdev, cap + PCI_X_CMD, &cmd);
  		cmd &= ~PCI_X_CMD_MAX_SPLIT;
 		pci_write_config_word(hw->pdev, cap + PCI_X_CMD, cmd);
-
- 		sky2->rx_csum = 0;
- 		osky2->rx_csum = 0;
  	}
 
 	if (netif_msg_ifup(sky2))
@@ -4013,7 +4009,7 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
 	sky2->duplex = -1;
 	sky2->speed = -1;
 	sky2->advertising = sky2_supported_modes(hw);
-	sky2->rx_csum = 1;
+	sky2->rx_csum = (hw->chip_id != CHIP_ID_YUKON_XL);
 	sky2->wol = wol;
 
 	spin_lock_init(&sky2->phy_lock);