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[PATCH] sky2: poke coalescing timer to fix hang

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Need to restart the interrupt coalescing timer after clearing the interrupt,
to avoid races with interrupt timer and processing.

Patch from Carl-Daniel Halfinger

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
This commit is contained in:
Stephen Hemminger 2006-02-22 11:45:00 -08:00 committed by Francois Romieu
parent ff81fbbe32
commit a8fd6266da
1 changed files with 11 additions and 0 deletions
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11
drivers/net/sky2.c
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@ -1895,6 +1895,17 @@ static int sky2_poll(struct net_device *dev0, int *budget)
sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
/*
* Kick the STAT_LEV_TIMER_CTRL timer.
* This fixes my hangs on Yukon-EC (0xb6) rev 1.
* The if clause is there to start the timer only if it has been
* configured correctly and not been disabled via ethtool.
*/
if (sky2_read8(hw, STAT_LEV_TIMER_CTRL) == TIM_START) {
sky2_write8(hw, STAT_LEV_TIMER_CTRL, TIM_STOP);
sky2_write8(hw, STAT_LEV_TIMER_CTRL, TIM_START);
}
hwidx = sky2_read16(hw, STAT_PUT_IDX);
BUG_ON(hwidx >= STATUS_RING_SIZE);
rmb();