diff options
| author | Dongdong Deng <dongdong.deng@windriver.com> | 2009-07-12 20:27:06 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-07-14 12:03:41 -0700 |
| commit | 79fbe134832ebb70a49d8802cfeb2401dc35bb38 (patch) | |
| tree | 52e810d78f6357826b83963286b1fcd9d53bd882 /drivers/net/cs89x0.c | |
| parent | bc23283c7bc90958927abe26eedc562701743a88 (diff) | |
| download | lwn-79fbe134832ebb70a49d8802cfeb2401dc35bb38.tar.gz lwn-79fbe134832ebb70a49d8802cfeb2401dc35bb38.zip | |
drivers/net: using spin_lock_irqsave() in net_send_packet()
spin_unlock_irq() will enable interrupt in net_send_packet(),
this patch changes it to spin_lock_irqsave/spin_lock_irqrestore,
so that it doesn't enable interrupts when already disabled,
and netconsole would work properly over cs89x0/isa-skeleton.
Call trace:
netconsole write_msg()
{
...
-> spin_lock_irqsave();
-> netpoll_send_udp()
-> netpoll_send_skb()
-> net_send_packet()
->...
-> spin_unlock_irqrestore();
...
}
Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/cs89x0.c')
| -rw-r--r-- | drivers/net/cs89x0.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/net/cs89x0.c b/drivers/net/cs89x0.c index 3eee666a9cd2..55445f980f9c 100644 --- a/drivers/net/cs89x0.c +++ b/drivers/net/cs89x0.c @@ -1524,6 +1524,7 @@ static void net_timeout(struct net_device *dev) static int net_send_packet(struct sk_buff *skb, struct net_device *dev) { struct net_local *lp = netdev_priv(dev); + unsigned long flags; if (net_debug > 3) { printk("%s: sent %d byte packet of type %x\n", @@ -1535,7 +1536,7 @@ static int net_send_packet(struct sk_buff *skb, struct net_device *dev) ask the chip to start transmitting before the whole packet has been completely uploaded. */ - spin_lock_irq(&lp->lock); + spin_lock_irqsave(&lp->lock, flags); netif_stop_queue(dev); /* initiate a transmit sequence */ @@ -1549,13 +1550,13 @@ static int net_send_packet(struct sk_buff *skb, struct net_device *dev) * we're waiting for TxOk, so return 1 and requeue this packet. */ - spin_unlock_irq(&lp->lock); + spin_unlock_irqrestore(&lp->lock, flags); if (net_debug) printk("cs89x0: Tx buffer not free!\n"); return NETDEV_TX_BUSY; } /* Write the contents of the packet */ writewords(dev->base_addr, TX_FRAME_PORT,skb->data,(skb->len+1) >>1); - spin_unlock_irq(&lp->lock); + spin_unlock_irqrestore(&lp->lock, flags); lp->stats.tx_bytes += skb->len; dev->trans_start = jiffies; dev_kfree_skb (skb); |