[netdrvr] convert sbmac tx to spin_lock_irqsave to prevent early IRQ enable

Netpoll will call the interrupt handler with interrupts
disabled when using kgdboe, so spin_lock_irqsave() should
be used instead of spin_lock_irq() to prevent interrupts
from being incorrectly enabled.

Signed-off-by: Weiwei Wang <weiwei.wang@windriver.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

diff --git a/drivers/net/sb1250-mac.c b/drivers/net/sb1250-mac.c
index fe41e4ec21ec2141d63df1c291ebc1035c50d4b6..ce10cfa1ee5371c48701ca7cf0cd12e5a38e7672 100644 (file)
--- a/drivers/net/sb1250-mac.c
+++ b/drivers/net/sb1250-mac.c
@@ -2069,9 +2069,10 @@ static irqreturn_t sbmac_intr(int irq,void *dev_instance)
 static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev)
 {
        struct sbmac_softc *sc = netdev_priv(dev);
+       unsigned long flags;
 
        /* lock eth irq */
-       spin_lock_irq (&sc->sbm_lock);
+       spin_lock_irqsave(&sc->sbm_lock, flags);
 
        /*
         * Put the buffer on the transmit ring.  If we
@@ -2081,14 +2082,14 @@ static int sbmac_start_tx(struct sk_buff *skb, struct net_device *dev)
        if (sbdma_add_txbuffer(&(sc->sbm_txdma),skb)) {
                /* XXX save skb that we could not send */
                netif_stop_queue(dev);
-               spin_unlock_irq(&sc->sbm_lock);
+               spin_unlock_irqrestore(&sc->sbm_lock, flags);
 
                return 1;
        }
 
        dev->trans_start = jiffies;
 
-       spin_unlock_irq (&sc->sbm_lock);
+       spin_unlock_irqrestore(&sc->sbm_lock, flags);
 
        return 0;
 }
@@ -2568,14 +2569,15 @@ static void sbmac_mii_poll(struct net_device *dev)
 static void sbmac_tx_timeout (struct net_device *dev)
 {
        struct sbmac_softc *sc = netdev_priv(dev);
+       unsigned long flags;
 
-       spin_lock_irq (&sc->sbm_lock);
+       spin_lock_irqsave(&sc->sbm_lock, flags);
 
 
        dev->trans_start = jiffies;
        dev->stats.tx_errors++;
 
-       spin_unlock_irq (&sc->sbm_lock);
+       spin_unlock_irqrestore(&sc->sbm_lock, flags);
 
        printk (KERN_WARNING "%s: Transmit timed out\n",dev->name);
 }