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| author | Jesse Huang <jesse@icplus.com.tw> | 2006-10-20 21:42:11 (GMT) |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2006-12-02 05:12:02 (GMT) |
| commit | 2109f89f3483ff5a05899385ee3fb04d779e9cce (patch) | |
| tree | ccdd29cbe3f5bc3cd27b5fbc09fff7e49e82985b | |
| parent | e242040df1da94a9a3daa98ea5539e2b52502bb4 (diff) | |
| download | linux-fsl-qoriq-2109f89f3483ff5a05899385ee3fb04d779e9cce.tar.xz | |
[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.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/net/sundance.c b/drivers/net/sundance.c index be1faa0..91cd2f5 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); |