netdev - Re: [PCNET32] Lock solid with netconsole

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Message-ID: <20070526224120.GA4476@electric-eye.fr.zoreil.com>
Date:	Sun, 27 May 2007 00:41:20 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Emmanuel Fusté <emmanuel.fuste@...oste.net>
Cc:	tsbogend <tsbogend@...ha.franken.de>,
	pcnet32 <pcnet32@...izon.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PCNET32] Lock solid with netconsole

Emmanuel Fusté <emmanuel.fuste@...oste.net> :
[...]
> Just to let you know that I swap my pcnet32 with a via-rhine
> and I no longer experienced hard machine lock after loading
> netconsole.

Any difference if you disable the debug messages in the pcnet32
driver and you apply the patch below ?

diff --git a/drivers/net/pcnet32.c b/drivers/net/pcnet32.c
index 9c171a7..be4513f 100644
--- a/drivers/net/pcnet32.c
+++ b/drivers/net/pcnet32.c
@@ -2556,11 +2556,12 @@ pcnet32_interrupt(int irq, void *dev_id)
 	unsigned long ioaddr;
 	u16 csr0;
 	int boguscnt = max_interrupt_work;
+	unsigned long flags;
 
 	ioaddr = dev->base_addr;
 	lp = netdev_priv(dev);
 
-	spin_lock(&lp->lock);
+	spin_lock_irqsave(&lp->lock, flags);
 
 	csr0 = lp->a.read_csr(ioaddr, CSR0);
 	while ((csr0 & 0x8f00) && --boguscnt >= 0) {
@@ -2632,7 +2633,7 @@ pcnet32_interrupt(int irq, void *dev_id)
 		printk(KERN_DEBUG "%s: exiting interrupt, csr0=%#4.4x.\n",
 		       dev->name, lp->a.read_csr(ioaddr, CSR0));
 
-	spin_unlock(&lp->lock);
+	spin_unlock_irqrestore(&lp->lock, flags);
 
 	return IRQ_HANDLED;
 }
-
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