Re: 2.6.23-rc2-mm1: irq lock inversion dependency detected

Jarek Poplawski
2007-08-24T08:26:26Z

On 10-08-2007 09:06, Mariusz Kozlowski wrote:
> Hello,
>
> And the winner of today is ...
>
>
>
> =========================================================
> [ INFO: possible irq lock inversion dependency detected ]
> 2.6.23-rc2-mm1 #7
> ---------------------------------------------------------
> runscript.sh/5843 just changed the state of lock:
> (_xmit_ETHER){-+..}, at: [<c03cbe79>] dev_watchdog+0x17/0xcc
> but this lock took another, soft-irq-unsafe lock in the past:
> (&tp->lock){--..}
>
> and interrupts could create inverse lock ordering between them.
...
> Really no idea who to CC here ;)

IMHO, this should be fixed by last changes to free_irq & request_irq.
(Seems to be possible only with CONFIG_DEBUG_SHIRQ?) Otherwise I can
be CC-ed - my pleasure!

Cheers,
Jarek P.