forcedeth: preserve registers
Various registers need to be preserved before resetting the device.
Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 6d5cd94..d4843d0 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -1435,16 +1435,30 @@
{
struct fe_priv *np = netdev_priv(dev);
u8 __iomem *base = get_hwbase(dev);
+ u32 temp1, temp2, temp3;
dprintk(KERN_DEBUG "%s: nv_mac_reset\n", dev->name);
+
writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl);
pci_push(base);
+
+ /* save registers since they will be cleared on reset */
+ temp1 = readl(base + NvRegMacAddrA);
+ temp2 = readl(base + NvRegMacAddrB);
+ temp3 = readl(base + NvRegTransmitPoll);
+
writel(NVREG_MAC_RESET_ASSERT, base + NvRegMacReset);
pci_push(base);
udelay(NV_MAC_RESET_DELAY);
writel(0, base + NvRegMacReset);
pci_push(base);
udelay(NV_MAC_RESET_DELAY);
+
+ /* restore saved registers */
+ writel(temp1, base + NvRegMacAddrA);
+ writel(temp2, base + NvRegMacAddrB);
+ writel(temp3, base + NvRegTransmitPoll);
+
writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl);
pci_push(base);
}