From 3e4b32e11674a40cf50e48a79764f12988641e20 Mon Sep 17 00:00:00 2001 From: Stephen Hemminger Date: Fri, 9 Dec 2005 11:35:05 -0800 Subject: [PATCH] [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 Signed-off-by: Jeff Garzik --- drivers/net/sky2.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 21aeb0c91f..af9739c1ef 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -1736,7 +1736,6 @@ static int sky2_poll(struct net_device *dev0, int *budget) u16 hwidx; u16 tx_done[2] = { TX_NO_STATUS, TX_NO_STATUS }; - sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ); hwidx = sky2_read16(hw, STAT_PUT_IDX); BUG_ON(hwidx >= STATUS_RING_SIZE); rmb(); @@ -1754,8 +1753,6 @@ static int sky2_poll(struct net_device *dev0, int *budget) hw->st_idx = (hw->st_idx + 1) % STATUS_RING_SIZE; prefetch(hw->st_le + hw->st_idx); - BUG_ON(le->link >= hw->ports || !hw->dev[le->link]); - BUG_ON(le->link >= 2); dev = hw->dev[le->link]; if (dev == NULL || !netif_running(dev)) @@ -1821,12 +1818,13 @@ static int sky2_poll(struct net_device *dev0, int *budget) } exit_loop: + sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ); mmiowb(); sky2_tx_check(hw, 0, tx_done[0]); sky2_tx_check(hw, 1, tx_done[1]); - if (work_done < to_do) { + if (sky2_read16(hw, STAT_PUT_IDX) == hw->st_idx) { /* need to restart TX timer */ if (is_ec_a1(hw)) { sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP); -- 2.39.5