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>

2 files changed, 12 insertions, 26 deletions

diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 227df9876a2c..76da74fbe859 100644
--- a/drivers/net/sky2.c
+++ b/drivers/net/sky2.c
@@ -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;
 }
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 309f9190a922..a461b51d6076 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -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;
         }