Re: [PATCH] wifi-test: add simple roam test script

[Johannes Berg <johannes@sipsolutions.net>]

On Thu, 2010-09-23 at 17:02 +0200, Johannes Berg wrote:
> On Thu, 2010-09-23 at 07:53 -0700, Luis R. Rodriguez wrote:
> 
> > >> After roaming for a good while, this is what I got, not sure
> > >> yet what caused the NULL pointer dereference... Am I the only
> > >> one able to reproduce this?
> > >
> > >> [ 3276.730081] BUG: unable to handle kernel NULL pointer dereference at 0000000000000003
> > >> [ 3276.730148] IP: [<0000000000000003>] 0x3
> > >
> > > Something called a NULL pointer function pointer. Rafael recently said
> > > "cpuidle is buggy" when a similar issue came up:
> > > http://mid.gmane.org/201009182344.12498.rjw@sisk.pl
> > 
> > But that seems related to ACPI, no? On my box I never suspended, I
> > just associated and disassociated rapidly between two peers. The only
> > suspicion I have is its obviously right after adding the STA peer.
> 
> Yes, but he said suspend/resume _fixed_ it :-)

Hm never mind, misunderstood the original report ... suspend + wait +
resume was what was broken.

But still, it's a NULL pointer call, and I can't really see how that
would happen.

johannes