From: chinmay albal <albal@in.ibm.com>
We sometimes receive a "Bus master arbitration failure, status ffff" error
on pcnet32 drivers while running a huge network load on a 2.6.x kernel.
Applying spinlocks on the watchdog timer routine helps getting across the
problem. A patch for the same is given below.
---
drivers/net/pcnet32.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletion(-)
diff -puN drivers/net/pcnet32.c~pcnet32-locking-fix drivers/net/pcnet32.c
--- 25/drivers/net/pcnet32.c~pcnet32-locking-fix 2004-02-06 23:25:58.000000000 -0800
+++ 25-akpm/drivers/net/pcnet32.c 2004-02-06 23:25:58.000000000 -0800
@@ -1708,12 +1708,16 @@ static int pcnet32_ioctl(struct net_devi
static void pcnet32_watchdog(struct net_device *dev)
{
struct pcnet32_private *lp = dev->priv;
+ unsigned long flags;
+
+ spin_lock_irqsave(&lp->lock, flags);
/* Print the link status if it has changed */
if (lp->mii)
mii_check_media (&lp->mii_if, 1, 0);
-
mod_timer (&(lp->watchdog_timer), PCNET32_WATCHDOG_TIMEOUT);
+
+ spin_unlock_irqrestore(&lp->lock, flags);
}
static struct pci_driver pcnet32_driver = {
_