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sky2: status irq hang fix

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The status interrupt flag should be cleared before processing,
not afterwards to avoid race. Need to process in poll routine
even if no new interrupt status. This is a normal occurrence when
more than 64 frames (NAPI weight) are processed in one poll routine.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
This commit is contained in:
Stephen Hemminger 2006-05-08 15:11:27 -07:00
parent d324031245
commit 1e5f1283a2
1 changed files with 26 additions and 29 deletions
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55
drivers/net/sky2.c
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@ -2105,45 +2105,42 @@ static int sky2_poll(struct net_device *dev0, int *budget)
int work_done = 0;
u32 status = sky2_read32(hw, B0_Y2_SP_EISR);
if (unlikely(status & ~Y2_IS_STAT_BMU)) {
if (status & Y2_IS_HW_ERR)
sky2_hw_intr(hw);
if (status & Y2_IS_HW_ERR)
sky2_hw_intr(hw);
if (status & Y2_IS_IRQ_PHY1)
sky2_phy_intr(hw, 0);
if (status & Y2_IS_IRQ_PHY1)
sky2_phy_intr(hw, 0);
if (status & Y2_IS_IRQ_PHY2)
sky2_phy_intr(hw, 1);
if (status & Y2_IS_IRQ_PHY2)
sky2_phy_intr(hw, 1);
if (status & Y2_IS_IRQ_MAC1)
sky2_mac_intr(hw, 0);
if (status & Y2_IS_IRQ_MAC1)
sky2_mac_intr(hw, 0);
if (status & Y2_IS_IRQ_MAC2)
sky2_mac_intr(hw, 1);
if (status & Y2_IS_IRQ_MAC2)
sky2_mac_intr(hw, 1);
if (status & Y2_IS_CHK_RX1)
sky2_descriptor_error(hw, 0, "receive", Y2_IS_CHK_RX1);
if (status & Y2_IS_CHK_RX1)
sky2_descriptor_error(hw, 0, "receive", Y2_IS_CHK_RX1);
if (status & Y2_IS_CHK_RX2)
sky2_descriptor_error(hw, 1, "receive", Y2_IS_CHK_RX2);
if (status & Y2_IS_CHK_RX2)
sky2_descriptor_error(hw, 1, "receive", Y2_IS_CHK_RX2);
if (status & Y2_IS_CHK_TXA1)
sky2_descriptor_error(hw, 0, "transmit", Y2_IS_CHK_TXA1);
if (status & Y2_IS_CHK_TXA1)
sky2_descriptor_error(hw, 0, "transmit", Y2_IS_CHK_TXA1);
if (status & Y2_IS_CHK_TXA2)
sky2_descriptor_error(hw, 1, "transmit", Y2_IS_CHK_TXA2);
}
if (status & Y2_IS_STAT_BMU) {
work_done = sky2_status_intr(hw, work_limit);
*budget -= work_done;
dev0->quota -= work_done;
if (work_done >= work_limit)
return 1;
if (status & Y2_IS_CHK_TXA2)
sky2_descriptor_error(hw, 1, "transmit", Y2_IS_CHK_TXA2);
if (status & Y2_IS_STAT_BMU)
sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
}
work_done = sky2_status_intr(hw, work_limit);
*budget -= work_done;
dev0->quota -= work_done;
if (work_done >= work_limit)
return 1;
mod_timer(&hw->idle_timer, jiffies + HZ);