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sky2: backout NAPI reschedule 

This is a backout of earlier patch.

The whole rescheduling hack was a bad idea. It doesn't really solve
the problem and it makes the code more complicated for no good reason.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
hifive-unleashed-5.1
Stephen Hemminger 2006-05-08 15:11:26 -07:00
parent 6810b548b2
commit d324031245
2 changed files with 12 additions and 26 deletions
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20
drivers/net/sky2.c
View File

@ -2105,7 +2105,6 @@ static int sky2_poll(struct net_device *dev0, int *budget)
int work_done = 0;
u32 status = sky2_read32(hw, B0_Y2_SP_EISR);
restart_poll:
if (unlikely(status & ~Y2_IS_STAT_BMU)) {
if (status & Y2_IS_HW_ERR)
sky2_hw_intr(hw);
@ -2136,7 +2135,7 @@ static int sky2_poll(struct net_device *dev0, int *budget)
}
if (status & Y2_IS_STAT_BMU) {
work_done += sky2_status_intr(hw, work_limit - work_done);
work_done = sky2_status_intr(hw, work_limit);
*budget -= work_done;
dev0->quota -= work_done;
@ -2148,22 +2147,9 @@ static int sky2_poll(struct net_device *dev0, int *budget)
mod_timer(&hw->idle_timer, jiffies + HZ);
local_irq_disable();
__netif_rx_complete(dev0);
netif_rx_complete(dev0);
status = sky2_read32(hw, B0_Y2_SP_LISR);
if (unlikely(status)) {
/* More work pending, try and keep going */
if (__netif_rx_schedule_prep(dev0)) {
__netif_rx_reschedule(dev0, work_done);
status = sky2_read32(hw, B0_Y2_SP_EISR);
local_irq_enable();
goto restart_poll;
}
}
local_irq_enable();
return 0;
}
@ -2181,6 +2167,8 @@ static irqreturn_t sky2_intr(int irq, void *dev_id, struct pt_regs *regs)
prefetch(&hw->st_le[hw->st_idx]);
if (likely(__netif_rx_schedule_prep(dev0)))
__netif_rx_schedule(dev0);
else
printk(KERN_DEBUG PFX "irq race detected\n");
return IRQ_HANDLED;
}

18
include/linux/netdevice.h
View File

@ -831,21 +831,19 @@ static inline void netif_rx_schedule(struct net_device *dev)
__netif_rx_schedule(dev);
}
static inline void __netif_rx_reschedule(struct net_device *dev, int undo)
{
dev->quota += undo;
list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
__raise_softirq_irqoff(NET_RX_SOFTIRQ);
}
/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete(). */
/* Try to reschedule poll. Called by dev->poll() after netif_rx_complete().
* Do not inline this?
*/
static inline int netif_rx_reschedule(struct net_device *dev, int undo)
{
if (netif_rx_schedule_prep(dev)) {
unsigned long flags;
dev->quota += undo;
local_irq_save(flags);
__netif_rx_reschedule(dev, undo);
list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list);
__raise_softirq_irqoff(NET_RX_SOFTIRQ);
local_irq_restore(flags);
return 1;
}