Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5c11ce700f77fada15b6264417d72462da4bbb1c Commit: 5c11ce700f77fada15b6264417d72462da4bbb1c Parent: 3cf267539f1f133eb6ba63d074da18cb58cdf89a Author: Stephen Hemminger <[EMAIL PROTECTED]> AuthorDate: Mon Jul 9 15:33:36 2007 -0700 Committer: Jeff Garzik <[EMAIL PROTECTED]> CommitDate: Tue Jul 10 12:22:29 2007 -0400
sky2: check for more work before leaving NAPI This patch avoids generating another IRQ if more packets arrive while in the NAPI poll routine. Before marking device as finished, it rechecks that the status ring is empty. Signed-off-by: Stephen Hemminger <[EMAIL PROTECTED]> Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]> --- drivers/net/sky2.c | 35 +++++++++++++++++------------------ 1 files changed, 17 insertions(+), 18 deletions(-) diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 90b1b97..c8e51cf 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -2477,8 +2477,7 @@ static void sky2_err_intr(struct sky2_hw *hw, u32 status) static int sky2_poll(struct net_device *dev0, int *budget) { struct sky2_hw *hw = ((struct sky2_port *) netdev_priv(dev0))->hw; - int work_limit = min(dev0->quota, *budget); - int work_done = 0; + int work_done; u32 status = sky2_read32(hw, B0_Y2_SP_EISR); if (unlikely(status & Y2_IS_ERROR)) @@ -2490,25 +2489,25 @@ static int sky2_poll(struct net_device *dev0, int *budget) if (status & Y2_IS_IRQ_PHY2) sky2_phy_intr(hw, 1); - work_done = sky2_status_intr(hw, work_limit); - if (work_done < work_limit) { - /* Bug/Errata workaround? - * Need to kick the TX irq moderation timer. - */ - if (sky2_read8(hw, STAT_TX_TIMER_CTRL) == TIM_START) { - sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP); - sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START); - } - netif_rx_complete(dev0); + work_done = sky2_status_intr(hw, min(dev0->quota, *budget)); + *budget -= work_done; + dev0->quota -= work_done; - /* end of interrupt, re-enables also acts as I/O synchronization */ - sky2_read32(hw, B0_Y2_SP_LISR); - return 0; - } else { - *budget -= work_done; - dev0->quota -= work_done; + /* More work? */ + if (hw->st_idx != sky2_read16(hw, STAT_PUT_IDX)) return 1; + + /* Bug/Errata workaround? + * Need to kick the TX irq moderation timer. + */ + if (sky2_read8(hw, STAT_TX_TIMER_CTRL) == TIM_START) { + sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP); + sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START); } + netif_rx_complete(dev0); + + sky2_read32(hw, B0_Y2_SP_LISR); + return 0; } static irqreturn_t sky2_intr(int irq, void *dev_id) - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html