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[PATCH] sundance: solve host error problem in low performance embedded system when continune down and up 

Solve host error problem in low performance embedded system when continune
down and up.  It will cause IP100A DMA TargetAbort.  So we need more safe
process to up and down IP100A with wait hardware completely stop and software
cur_tx/ dirty_tx/cur_task/last_tx be clear.

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>
This commit is contained in:
Jesse Huang 2006-11-08 19:49:12 -08:00 committed by Jeff Garzik
parent d0bb53e102
commit 31f817e9d6
1 changed files with 23 additions and 3 deletions
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26
drivers/net/sundance.c
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@ -1642,6 +1642,14 @@ static int netdev_close(struct net_device *dev)
struct sk_buff *skb;
int i;
/* Wait and kill tasklet */
tasklet_kill(&np->rx_tasklet);
tasklet_kill(&np->tx_tasklet);
np->cur_tx = 0;
np->dirty_tx = 0;
np->cur_task = 0;
np->last_tx = 0;
netif_stop_queue(dev);
if (netif_msg_ifdown(np)) {
@ -1662,9 +1670,20 @@ static int netdev_close(struct net_device *dev)
/* Stop the chip's Tx and Rx processes. */
iowrite16(TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl1);
/* Wait and kill tasklet */
tasklet_kill(&np->rx_tasklet);
tasklet_kill(&np->tx_tasklet);
for (i = 2000; i > 0; i--) {
if ((ioread32(ioaddr + DMACtrl) & 0xc000) == 0)
break;
mdelay(1);
}
iowrite16(GlobalReset | DMAReset | FIFOReset | NetworkReset,
ioaddr +ASICCtrl + 2);
for (i = 2000; i > 0; i--) {
if ((ioread16(ioaddr + ASICCtrl +2) & ResetBusy) == 0)
break;
mdelay(1);
}
#ifdef __i386__
if (netif_msg_hw(np)) {
@ -1702,6 +1721,7 @@ static int netdev_close(struct net_device *dev)
}
}
for (i = 0; i < TX_RING_SIZE; i++) {
np->tx_ring[i].next_desc = 0;
skb = np->tx_skbuff[i];
if (skb) {
pci_unmap_single(np->pci_dev,