From be61ea52900b97800effbb68478915d73b5d4df2 Mon Sep 17 00:00:00 2001
From: Weiwei Wang <weiwei.wang@windriver.com>
Date: Thu, 18 Sep 2008 08:23:48 +0800
Subject: [PATCH] [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>
---
drivers/net/sb1250-mac.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/net/sb1250-mac.c b/drivers/net/sb1250-mac.c
index fe41e4ec21ec..ce10cfa1ee53 100644
--- 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);
}