From: Jesse Huang Solve host error problem in low performance embedded system when continune down and up. Signed-off-by: Jesse Huang Signed-off-by: Andrew Morton --- drivers/net/sundance.c | 26 +++++++++++++++++++++++--- 1 file changed, 23 insertions(+), 3 deletions(-) diff -puN drivers/net/sundance.c~ip100a-solve-host-error-problem-in-low-performance drivers/net/sundance.c --- a/drivers/net/sundance.c~ip100a-solve-host-error-problem-in-low-performance +++ a/drivers/net/sundance.c @@ -1642,6 +1642,14 @@ static int netdev_close(struct net_devic 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_devic /* 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_devic } } 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, _