[FORCEDETH]: Fix reversing the MAC address on suspend.

For cards that initially have the MAC address stored in reverse order,
the forcedeth driver uses a flag to signal whether the address was
already corrected, so that it is not reversed again on a subsequent
probe.

Unfortunately this flag, which is stored in a register of the card,
seems to get lost during suspend, resulting in the MAC address being
reversed again. To fix that, the MAC address needs to be written back
in reversed order before we suspend and the flag needs to be reset.

The flag is still required because at least kexec will never write
back the reversed address and thus needs to know what state the card
is in.

Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index a96583cceb5e..f84c752997a4 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -5199,10 +5199,6 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i
 		dev->dev_addr[3] = (np->orig_mac[0] >> 16) & 0xff;
 		dev->dev_addr[4] = (np->orig_mac[0] >>  8) & 0xff;
 		dev->dev_addr[5] = (np->orig_mac[0] >>  0) & 0xff;
-		/* set permanent address to be correct aswell */
-		np->orig_mac[0] = (dev->dev_addr[0] << 0) + (dev->dev_addr[1] << 8) +
-			(dev->dev_addr[2] << 16) + (dev->dev_addr[3] << 24);
-		np->orig_mac[1] = (dev->dev_addr[4] << 0) + (dev->dev_addr[5] << 8);
 		writel(txreg|NVREG_TRANSMITPOLL_MAC_ADDR_REV, base + NvRegTransmitPoll);
 	}
 	memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
@@ -5414,6 +5410,8 @@ static void __devexit nv_remove(struct pci_dev *pci_dev)
 	 */
 	writel(np->orig_mac[0], base + NvRegMacAddrA);
 	writel(np->orig_mac[1], base + NvRegMacAddrB);
+	writel(readl(base + NvRegTransmitPoll) & ~NVREG_TRANSMITPOLL_MAC_ADDR_REV,
+	       base + NvRegTransmitPoll);
 
 	/* free all structures */
 	free_rings(dev);