Re: Bug: 2.4.0 w/ PCMCIA on ThinkPad: KERNEL: assertion(dev->ip_ptr==NULL)failed at dev.c(2422):netdev_finish_unregister

[Thomas Hood <jdthoodREMOVETHIS@yahoo.co.uk>]

This problem has been resolved (sort of).  See the follow up to 
"[PATCH] to deal with bad dev->refcnt in unregister_netdevice()"

Thomas Hood

> Here is a patch which may not solve the underlying
> problem but which does prevent the kernel from 
> generating an infinite number of error messages
> on "cardctl eject" and from hanging up on shutdown.
> 
> ----------------------------------------------------
> jdthood@thanatos:/usr/src/kernel-source-2.4.1-ac3/net/core# diff dev.c_ORIG dev.c
> 2558c2558
> < 	while (atomic_read(&dev->refcnt) != 1) {
> ---
> > 	while (atomic_read(&dev->refcnt) > 1) {
> -----------------------------------------------------
> 
> The underlying problem is that refcnt is zero or less
> at this point.  This is erroneous.  The error in 
> maintaining the refcnt appears to occur only when 
> I configure the eth0 interface using pump or dhclient.
> Be that as it may, because of the erroneous refcnt,
> this while loop loops forever in the original.  As
> modified it falls through; and this makes the kernel
> usable for me.
> 
> I hope the networking gurus can find the real bug.
> 
> Thomas Hood
>
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