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 <[EMAIL PROTECTED]>
--- sky2.orig/drivers/net/sky2.c 2006-02-21 09:14:34.000000000 -0800
+++ sky2/drivers/net/sky2.c 2006-02-21 09:15:04.000000000 -0800
@@ -1895,6 +1895,17 @@
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();
--
-
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