Re: BUG: scheduling while atomic: ifconfig/0x00000002/4170

Florian Lohoff
2007-09-06T09:05:48Z

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On Thu, Sep 06, 2007 at 02:11:46PM +0530, Satyam Sharma wrote:
> On Thu, 6 Sep 2007, Herbert Xu wrote:
>
> > On Thu, Sep 06, 2007 at 10:32:33AM +0530, Satyam Sharma wrote:
> > >
> > > > > [ 382.529041] [<c02c8abc>] dev_close+0x24/0x67
> > > > > [ 382.529052] [<e01f402b>] ieee80211_master_stop+0x4a/0x6d [mac80211]
> >
> > This is where the bug is. You cannot call dev_close from an
> > atomic context as i33380211_master_stop does it within spin
> > locks.
>
> Doh, of course! I must be blind ... and wait_for_completion()'s
> might_sleep() clearly didn't trigger earlier because Florian must've
> had CONFIG_DEBUG_SPINLOCK_SLEEP off in his .config ...

# CONFIG_DEBUG_SPINLOCK_SLEEP is not set

Exactly ...

Flo
--
Florian Lohoff flo@rfc822.org +49-171-2280134
Those who would give up a little freedom to get a little
security shall soon have neither - Benjamin Franklin

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