[PATCH] sky2: interrupt/poll optimization
Optimize poll routine by not clearing interrupt till after processing, and checking for more work before re-enable. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
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1 changed files with 2 additions and 4 deletions
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@ -1736,7 +1736,6 @@ static int sky2_poll(struct net_device *dev0, int *budget)
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u16 hwidx;
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u16 tx_done[2] = { TX_NO_STATUS, TX_NO_STATUS };
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sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
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hwidx = sky2_read16(hw, STAT_PUT_IDX);
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BUG_ON(hwidx >= STATUS_RING_SIZE);
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rmb();
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@ -1754,8 +1753,6 @@ static int sky2_poll(struct net_device *dev0, int *budget)
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hw->st_idx = (hw->st_idx + 1) % STATUS_RING_SIZE;
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prefetch(hw->st_le + hw->st_idx);
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BUG_ON(le->link >= hw->ports || !hw->dev[le->link]);
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BUG_ON(le->link >= 2);
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dev = hw->dev[le->link];
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if (dev == NULL || !netif_running(dev))
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@ -1821,12 +1818,13 @@ static int sky2_poll(struct net_device *dev0, int *budget)
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}
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exit_loop:
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sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
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mmiowb();
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sky2_tx_check(hw, 0, tx_done[0]);
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sky2_tx_check(hw, 1, tx_done[1]);
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if (work_done < to_do) {
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if (sky2_read16(hw, STAT_PUT_IDX) == hw->st_idx) {
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/* need to restart TX timer */
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if (is_ec_a1(hw)) {
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sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP);
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