Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  natsemi: Avoid IntrStatus lossage if RX state machine resets.
  natsemi: Fix NAPI for interrupt sharing
  natsemi: Consistently use interrupt enable/disable functions
  NetXen: Fix softlockup seen during hardware access
  NetXen: Bug fix for Jumbo frames on XG card
  skge: set mac address bonding fix

1 files changed, 31 insertions, 27 deletions

diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
index c6172a77a6d..349b96a3ec4 100644
--- a/drivers/net/natsemi.c
+++ b/drivers/net/natsemi.c
@@ -1712,7 +1712,7 @@ static void init_registers(struct net_device *dev)
 
 	/* Enable interrupts by setting the interrupt mask. */
 	writel(DEFAULT_INTR, ioaddr + IntrMask);
-	writel(1, ioaddr + IntrEnable);
+	natsemi_irq_enable(dev);
 
 	writel(RxOn | TxOn, ioaddr + ChipCmd);
 	writel(StatsClear, ioaddr + StatsCtrl); /* Clear Stats */
@@ -2119,28 +2119,35 @@ static irqreturn_t intr_handler(int irq, void *dev_instance)
 	struct netdev_private *np = netdev_priv(dev);
 	void __iomem * ioaddr = ns_ioaddr(dev);
 
-	if (np->hands_off)
+	/* Reading IntrStatus automatically acknowledges so don't do
+	 * that while interrupts are disabled, (for example, while a
+	 * poll is scheduled).  */
+	if (np->hands_off || !readl(ioaddr + IntrEnable))
 		return IRQ_NONE;
 
-	/* Reading automatically acknowledges. */
 	np->intr_status = readl(ioaddr + IntrStatus);
 
+	if (!np->intr_status)
+		return IRQ_NONE;
+
 	if (netif_msg_intr(np))
 		printk(KERN_DEBUG
 		       "%s: Interrupt, status %#08x, mask %#08x.\n",
 		       dev->name, np->intr_status,
 		       readl(ioaddr + IntrMask));
 
-	if (!np->intr_status)
-		return IRQ_NONE;
-
 	prefetch(&np->rx_skbuff[np->cur_rx % RX_RING_SIZE]);
 
 	if (netif_rx_schedule_prep(dev)) {
 		/* Disable interrupts and register for poll */
 		natsemi_irq_disable(dev);
 		__netif_rx_schedule(dev);
-	}
+	} else
+		printk(KERN_WARNING
+	       	       "%s: Ignoring interrupt, status %#08x, mask %#08x.\n",
+		       dev->name, np->intr_status,
+		       readl(ioaddr + IntrMask));
+
 	return IRQ_HANDLED;
 }
 
@@ -2156,6 +2163,20 @@ static int natsemi_poll(struct net_device *dev, int *budget)
 	int work_done = 0;
 
 	do {
+		if (netif_msg_intr(np))
+			printk(KERN_DEBUG
+			       "%s: Poll, status %#08x, mask %#08x.\n",
+			       dev->name, np->intr_status,
+			       readl(ioaddr + IntrMask));
+
+		/* netdev_rx() may read IntrStatus again if the RX state
+		 * machine falls over so do it first. */
+		if (np->intr_status &
+		    (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
+		     IntrRxErr | IntrRxOverrun)) {
+			netdev_rx(dev, &work_done, work_to_do);
+		}
+
 		if (np->intr_status &
 		    (IntrTxDone | IntrTxIntr | IntrTxIdle | IntrTxErr)) {
 			spin_lock(&np->lock);
@@ -2167,12 +2188,6 @@ static int natsemi_poll(struct net_device *dev, int *budget)
 		if (np->intr_status & IntrAbnormalSummary)
 			netdev_error(dev, np->intr_status);
 
-		if (np->intr_status &
-		    (IntrRxDone | IntrRxIntr | RxStatusFIFOOver |
-		     IntrRxErr | IntrRxOverrun)) {
-			netdev_rx(dev, &work_done, work_to_do);
-		}
-
 		*budget -= work_done;
 		dev->quota -= work_done;
 
@@ -2399,19 +2414,8 @@ static struct net_device_stats *get_stats(struct net_device *dev)
 #ifdef CONFIG_NET_POLL_CONTROLLER
 static void natsemi_poll_controller(struct net_device *dev)
 {
-	struct netdev_private *np = netdev_priv(dev);
-
 	disable_irq(dev->irq);
-
-	/*
-	 * A real interrupt might have already reached us at this point
-	 * but NAPI might still haven't called us back.  As the interrupt
-	 * status register is cleared by reading, we should prevent an
-	 * interrupt loss in this case...
-	 */
-	if (!np->intr_status)
-		intr_handler(dev->irq, dev);
-
+	intr_handler(dev->irq, dev);
 	enable_irq(dev->irq);
 }
 #endif
@@ -3071,7 +3075,7 @@ static void enable_wol_mode(struct net_device *dev, int enable_intr)
 		 * Could be used to send a netlink message.
 		 */
 		writel(WOLPkt | LinkChange, ioaddr + IntrMask);
-		writel(1, ioaddr + IntrEnable);
+		natsemi_irq_enable(dev);
 	}
 }
 
@@ -3202,7 +3206,7 @@ static int natsemi_suspend (struct pci_dev *pdev, pm_message_t state)
 		disable_irq(dev->irq);
 		spin_lock_irq(&np->lock);
 
-		writel(0, ioaddr + IntrEnable);
+		natsemi_irq_disable(dev);
 		np->hands_off = 1;
 		natsemi_stop_rxtx(dev);
 		netif_stop_queue(dev);