1 files changed, 17 insertions, 15 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 62be6d99d05c..277c57b3df9c 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -1020,19 +1020,26 @@ static int sky2_up(struct net_device *dev)
         struct sky2_hw *hw = sky2->hw;
         unsigned port = sky2->port;
         u32 ramsize, rxspace, imask;
-        int err;
+        int cap, err = -ENOMEM;
         struct net_device *otherdev = hw->dev[sky2->port^1];
 
-        /* Block bringing up both ports at the same time on a dual port card.
-         * There is an unfixed bug where receiver gets confused and picks up
-         * packets out of order. Until this is fixed, prevent data corruption.
+        /*
+         * 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)) {
-                printk(KERN_INFO PFX "dual port support is disabled.\n");
-                return -EBUSY;
-        }
+        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;
+        }
 
-        err = -ENOMEM;
         if (netif_msg_ifup(sky2))
                 printk(KERN_INFO PFX "%s: enabling interface\n", dev->name);
 
@@ -3078,12 +3085,7 @@ static __devinit struct net_device *sky2_init_netdev(struct sky2_hw *hw,
         sky2->duplex = -1;
         sky2->speed = -1;
         sky2->advertising = sky2_supported_modes(hw);
-
-        /* Receive checksum disabled for Yukon XL
-         * because of observed problems with incorrect
-         * values when multiple packets are received in one interrupt
-         */
-        sky2->rx_csum = (hw->chip_id != CHIP_ID_YUKON_XL);
+        sky2->rx_csum = 1;
 
         spin_lock_init(&sky2->phy_lock);
         sky2->tx_pending = TX_DEF_PENDING;