diff options
| author | Dongdong Deng | 2009-07-12 22:27:06 +0200 |
|---|---|---|
| committer | David S. Miller | 2009-07-14 21:03:41 +0200 |
| commit | 79fbe134832ebb70a49d8802cfeb2401dc35bb38 (patch) | |
| tree | 52e810d78f6357826b83963286b1fcd9d53bd882 /drivers/net/isa-skeleton.c | |
| parent | NET: phy_device, fix lock imbalance (diff) | |
| download | kernel-qcow2-linux-79fbe134832ebb70a49d8802cfeb2401dc35bb38.tar.gz kernel-qcow2-linux-79fbe134832ebb70a49d8802cfeb2401dc35bb38.tar.xz kernel-qcow2-linux-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/isa-skeleton.c')
| -rw-r--r-- | drivers/net/isa-skeleton.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/net/isa-skeleton.c b/drivers/net/isa-skeleton.c index 73585fd8f29f..d12377b84358 100644 --- a/drivers/net/isa-skeleton.c +++ b/drivers/net/isa-skeleton.c @@ -430,7 +430,8 @@ static int net_send_packet(struct sk_buff *skb, struct net_device *dev) * hardware interrupt handler. Queue flow control is * thus managed under this lock as well. */ - spin_lock_irq(&np->lock); + unsigned long flags; + spin_lock_irqsave(&np->lock, flags); add_to_tx_ring(np, skb, length); dev->trans_start = jiffies; @@ -446,7 +447,7 @@ static int net_send_packet(struct sk_buff *skb, struct net_device *dev) * is when the transmit statistics are updated. */ - spin_unlock_irq(&np->lock); + spin_unlock_irqrestore(&np->lock, flags); #else /* This is the case for older hardware which takes * a single transmit buffer at a time, and it is |