redonkable/alistair23-linux
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[PATCH] sky2: force NAPI repoll if busy

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If the status ring processing can't keep up with the incoming frames,
it is more efficient to have NAPI keep scheduling the poll routine
rather than causing another interrupt.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Stephen Hemminger 2006-05-17 14:37:06 -07:00 committed by Jeff Garzik
parent 86a31a759f
commit 86fba6342d
1 changed files with 11 additions and 5 deletions
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16
drivers/net/sky2.c
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@ -1919,6 +1919,12 @@ static inline void sky2_tx_done(struct net_device *dev, u16 last)
}
}
/* Is status ring empty or is there more to do? */
static inline int sky2_more_work(const struct sky2_hw *hw)
{
return (hw->st_idx != sky2_read16(hw, STAT_PUT_IDX));
}
/* Process status response ring */
static int sky2_status_intr(struct sky2_hw *hw, int to_do)
{
@ -2191,19 +2197,19 @@ static int sky2_poll(struct net_device *dev0, int *budget)
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)
if (status & Y2_IS_STAT_BMU)
sky2_write32(hw, STAT_CTRL, SC_STAT_CLR_IRQ);
if (sky2_more_work(hw))
return 1;
netif_rx_complete(dev0);
status = sky2_read32(hw, B0_Y2_SP_LISR);
sky2_read32(hw, B0_Y2_SP_LISR);
return 0;
}