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authorStephen Hemminger <shemminger@linux-foundation.org>2007-02-06 10:45:42 -0800
committerJeff Garzik <jeff@garzik.org>2007-02-07 18:50:44 -0500
commit62335ab013d9eaef502bd402eb2eb72e8cff58f1 (patch)
tree0b8fbb6019b4e3002a9d7e64838b04761376d2ba /drivers/net/sky2.c
parent4a50a876ac325a45de1b582571c1248648801b52 (diff)
sky2: safer transmit timeout
Rather than trying to be "smart" about possible transmit timeout causes. Just clear all pending frames and reset the PHY. Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/sky2.c')
-rw-r--r--drivers/net/sky2.c41
1 files changed, 15 insertions, 26 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index e97dc299b56..c96362dae80 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -1840,48 +1840,37 @@ out:
}
-/* Transmit timeout is only called if we are running, carries is up
+/* Transmit timeout is only called if we are running, carrier is up
* and tx queue is full (stopped).
+ * Called with netif_tx_lock held.
*/
static void sky2_tx_timeout(struct net_device *dev)
{
struct sky2_port *sky2 = netdev_priv(dev);
struct sky2_hw *hw = sky2->hw;
- unsigned txq = txqaddr[sky2->port];
- u16 report, done;
+ u32 imask;
if (netif_msg_timer(sky2))
printk(KERN_ERR PFX "%s: tx timeout\n", dev->name);
- report = sky2_read16(hw, sky2->port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX);
- done = sky2_read16(hw, Q_ADDR(txq, Q_DONE));
-
printk(KERN_DEBUG PFX "%s: transmit ring %u .. %u report=%u done=%u\n",
- dev->name,
- sky2->tx_cons, sky2->tx_prod, report, done);
-
- if (report != done) {
- printk(KERN_INFO PFX "status burst pending (irq moderation?)\n");
+ dev->name, sky2->tx_cons, sky2->tx_prod,
+ sky2_read16(hw, sky2->port == 0 ? STAT_TXA1_RIDX : STAT_TXA2_RIDX),
+ sky2_read16(hw, Q_ADDR(txqaddr[sky2->port], Q_DONE)));
- sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP);
- sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START);
- } else if (report != sky2->tx_cons) {
- printk(KERN_INFO PFX "status report lost?\n");
+ imask = sky2_read32(hw, B0_IMSK); /* block IRQ in hw */
+ sky2_write32(hw, B0_IMSK, 0);
+ sky2_read32(hw, B0_IMSK);
- netif_tx_lock_bh(dev);
- sky2_tx_complete(sky2, report);
- netif_tx_unlock_bh(dev);
- } else {
- printk(KERN_INFO PFX "hardware hung? flushing\n");
+ netif_poll_disable(hw->dev[0]); /* stop NAPI poll */
+ synchronize_irq(hw->pdev->irq);
- sky2_write32(hw, Q_ADDR(txq, Q_CSR), BMU_STOP);
- sky2_write32(hw, Y2_QADDR(txq, PREF_UNIT_CTRL), PREF_UNIT_RST_SET);
+ netif_start_queue(dev); /* don't wakeup during flush */
+ sky2_tx_complete(sky2, sky2->tx_prod); /* Flush transmit queue */
- sky2_tx_clean(dev);
+ sky2_write32(hw, B0_IMSK, imask);
- sky2_qset(hw, txq);
- sky2_prefetch_init(hw, txq, sky2->tx_le_map, TX_RING_SIZE - 1);
- }
+ sky2_phy_reinit(sky2); /* this clears flow control etc */
}
static int sky2_change_mtu(struct net_device *dev, int new_mtu)