[PATCH] Allow pcnet_cs to work with shared irq

Here is a rediff'd version of the patch to fix shared irq handling in pcnet_cs
and generic 8390 drivers.

drivers/net/8390.c

@@ -513,7 +513,7 @@ irqreturn_t ei_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 		}
 	}
 	spin_unlock(&ei_local->page_lock);
-	return IRQ_HANDLED;
+	return IRQ_RETVAL(nr_serviced > 0);
 }
 
 /**

drivers/net/pcmcia/pcnet_cs.c

@@ -1163,10 +1163,11 @@ static irqreturn_t ei_irq_wrapper(int irq, void *dev_id, struct pt_regs *regs)
 {
     struct net_device *dev = dev_id;
     pcnet_dev_t *info = PRIV(dev);
-    info->stale = 0;
-    ei_interrupt(irq, dev_id, regs);
-    /* FIXME! Was it really ours? */
-    return IRQ_HANDLED;
+    irqreturn_t ret = ei_interrupt(irq, dev_id, regs);
+
+    if (ret == IRQ_HANDLED)
+	    info->stale = 0;
+    return ret;
 }
 
 static void ei_watchdog(u_long arg)