[PATCH] sundance: correct initial and close hardware step.

Correct initial and close hardware step.  In some embedded system down and up
IP100A will cause DMA crash.  We add some for safe down and up IP100A.

Signed-off-by: Jesse Huang <jesse@icplus.com.tw>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/sundance.c b/drivers/net/sundance.c
index 91cd2f52e628a7ccac1cdefb5de90c3eca884938..fba64d39ba19e2267cdf50a39dc030d40a4656e6 100644 (file)
--- a/drivers/net/sundance.c
+++ b/drivers/net/sundance.c
@@ -788,6 +788,7 @@ static int netdev_open(struct net_device *dev)
 {
        struct netdev_private *np = netdev_priv(dev);
        void __iomem *ioaddr = np->base;
+       unsigned long flags;
        int i;
 
        /* Do we need to reset the chip??? */
@@ -832,6 +833,10 @@ static int netdev_open(struct net_device *dev)
                iowrite8(0x01, ioaddr + DebugCtrl1);
        netif_start_queue(dev);
 
+       spin_lock_irqsave(&np->lock, flags);
+       reset_tx(dev);
+       spin_unlock_irqrestore(&np->lock, flags);
+
        iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
 
        if (netif_msg_ifup(np))
@@ -1651,6 +1656,9 @@ static int netdev_close(struct net_device *dev)
        /* Disable interrupts by clearing the interrupt mask. */
        iowrite16(0x0000, ioaddr + IntrEnable);
 
+       /* Disable Rx and Tx DMA for safely release resource */
+       iowrite32(0x500, ioaddr + DMACtrl);
+
        /* Stop the chip's Tx and Rx processes. */
        iowrite16(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1);