[PATCH 4/4] IP100A: Solve host error problem in low performance embedded system when continune down and up.

[Jesse Huang]

From: Jesse Huang <[EMAIL PROTECTED]>

Change Logs:
   - Solve host error problem in low performance embedded 
     system when continune down and up.

Signed-off-by: Jesse Huang <[EMAIL PROTECTED]>

---

 sundance.c |   30 +++++++++++++++++++++++++-----
 1 files changed, 25 insertions(+), 5 deletions(-)

a88c635933a981dd4fca87e5b8ca9426c5c98013
diff --git a/sundance.c b/sundance.c
index 424aebd..de55e0f 100755
--- a/sundance.c
+++ b/sundance.c
@@ -831,7 +831,7 @@ #endif
        if (np->pci_rev_id >= 0x14)
                iowrite8(0x01, ioaddr + DebugCtrl1);
        netif_start_queue(dev);
-       
+
        spin_lock_irqsave(&np->lock,flags);
        reset_tx(dev);
        spin_unlock_irqrestore(&np->lock,flags);
@@ -1076,7 +1076,7 @@ reset_tx (struct net_device *dev)
        struct sk_buff *skb;
        int i;
        int irq = in_interrupt();
-       
+
        /* Reset tx logic, TxListPtr will be cleaned */
        iowrite16 (TxDisable, ioaddr + MACCtrl1);
        iowrite16 (TxReset | DMAReset | FIFOReset | NetworkReset,
@@ -1647,6 +1647,14 @@ 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)) {
@@ -1667,9 +1675,20 @@ 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)) {
@@ -1707,6 +1726,7 @@ #endif /* __i386__ debugging only */
                }
        }
        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,
-- 
1.3.GIT



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