From: Jesse Huang <[email protected]>
Change Logs:
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 <[email protected]>
---
drivers/net/sundance.c | 16 ++++++++++++++--
1 files changed, 14 insertions(+), 2 deletions(-)
e146d4c423de9c2e9d55fbf9c6b3abbee14ce9ac
diff --git a/drivers/net/sundance.c b/drivers/net/sundance.c
index a5dd1c3..11ca31e 100755
--- 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,
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);
--
1.3.GIT