Heip!
If the forcedeth driver receives too much work in an interrupt, it assumes
it has a broken hardware with stuck IRQ. It works around the problem by
disabling interrupts on the nic but makes a printk while holding device
spinlog - which isn't smart thing to do if you have netconsole on the
same nic.
This patch moves the printk's out of the spinlock protected area.
Without this patch the machine hangs hard. With this patch everything still
works even when there is significant increase on CPU usage while using the
nic.
//T
Signed-off-by: Timo Jantunen <[email protected]>
diff -uprN -X linux-2.6.22.2/Documentation/dontdiff linux-2.6.22.2.original/drivers/net/forcedeth.c linux-2.6.22.2/drivers/net/forcedeth.c
--- linux-2.6.22.2.original/drivers/net/forcedeth.c 2007-08-10 08:20:27.761813671 +0300
+++ linux-2.6.22.2/drivers/net/forcedeth.c 2007-08-14 21:03:14.109056661 +0300
@@ -3067,8 +3067,8 @@ static irqreturn_t nv_nic_irq(int foo, v
np->nic_poll_irq = np->irqmask;
mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
}
- printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i);
spin_unlock(&np->lock);
+ printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i);
break;
}
@@ -3185,8 +3185,8 @@ static irqreturn_t nv_nic_irq_optimized(
np->nic_poll_irq = np->irqmask;
mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
}
- printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i);
spin_unlock(&np->lock);
+ printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq.\n", dev->name, i);
break;
}
@@ -3232,8 +3232,8 @@ static irqreturn_t nv_nic_irq_tx(int foo
np->nic_poll_irq |= NVREG_IRQ_TX_ALL;
mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
}
- printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_tx.\n", dev->name, i);
spin_unlock_irqrestore(&np->lock, flags);
+ printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_tx.\n", dev->name, i);
break;
}
@@ -3347,8 +3347,8 @@ static irqreturn_t nv_nic_irq_rx(int foo
np->nic_poll_irq |= NVREG_IRQ_RX_ALL;
mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
}
- printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_rx.\n", dev->name, i);
spin_unlock_irqrestore(&np->lock, flags);
+ printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_rx.\n", dev->name, i);
break;
}
}
@@ -3420,8 +3420,8 @@ static irqreturn_t nv_nic_irq_other(int
np->nic_poll_irq |= NVREG_IRQ_OTHER;
mod_timer(&np->nic_poll, jiffies + POLL_WAIT);
}
- printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_other.\n", dev->name, i);
spin_unlock_irqrestore(&np->lock, flags);
+ printk(KERN_DEBUG "%s: too many iterations (%d) in nv_nic_irq_other.\n", dev->name, i);
break;
}