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authorJesse Huang <jesse@icplus.com.tw>2006-10-20 14:42:11 -0700
committerJeff Garzik <jeff@garzik.org>2006-12-02 00:12:02 -0500
commit2109f89f3483ff5a05899385ee3fb04d779e9cce (patch)
treeccdd29cbe3f5bc3cd27b5fbc09fff7e49e82985b
parente242040df1da94a9a3daa98ea5539e2b52502bb4 (diff)
[PATCH] subdance: fix TX Pause bug (reset_tx, intr_handler)
Fix TX Pause bug (reset_tx, intr_handler). When MaxCollisions occurred, need to re-enable Tx. But just after re-enable, MaxCollisions maybe occurred again and with TxStatusOverflow. This will cause driver can't check new MaxCollisions to re-enable Tx again, because TxStatusOverflow. For this reason, after re-enable Tx, we need to make sure Tx was actually enabled. 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>
-rw-r--r--drivers/net/sundance.c16
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/net/sundance.c b/drivers/net/sundance.c
index be1faa02039..91cd2f52e62 100644
--- a/drivers/net/sundance.c
+++ b/drivers/net/sundance.c
@@ -1079,6 +1079,8 @@ reset_tx (struct net_device *dev)
/* free all tx skbuff */
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,
@@ -1094,6 +1096,10 @@ reset_tx (struct net_device *dev)
}
np->cur_tx = np->dirty_tx = 0;
np->cur_task = 0;
+
+ np->last_tx = 0;
+ iowrite8(127, ioaddr + TxDMAPollPeriod);
+
iowrite16 (StatsEnable | RxEnable | TxEnable, ioaddr + MACCtrl1);
return 0;
}
@@ -1162,8 +1168,14 @@ static irqreturn_t intr_handler(int irq, void *dev_instance)
sundance_reset(dev, (NetworkReset|FIFOReset|TxReset) << 16);
/* No need to reset the Tx pointer here */
}
- /* Restart the Tx. */
- iowrite16 (TxEnable, ioaddr + MACCtrl1);
+ /* Restart the Tx. Need to make sure tx enabled */
+ i = 10;
+ do {
+ iowrite16(ioread16(ioaddr + MACCtrl1) | TxEnable, ioaddr + MACCtrl1);
+ if (ioread16(ioaddr + MACCtrl1) & TxEnabled)
+ break;
+ mdelay(1);
+ } while (--i);
}
/* Yup, this is a documentation bug. It cost me *hours*. */
iowrite16 (0, ioaddr + TxStatus);