linux-kernel - Re: [RFC] add a WARN in setup_irq function for the IRQF

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Date:	Sat, 08 Jun 2013 00:19:35 +0200
From:	Daniel Lezcano <daniel.lezcano@...aro.org>
To:	Thomas Gleixner <tglx@...utronix.de>
CC:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] add a WARN in setup_irq function for the IRQF_DISABLED
 flag

On 06/08/2013 12:17 AM, Daniel Lezcano wrote:
> 
> Hi,
> 
> we are still seeing drivers with the irq flag IRQF_DISABLED present and
> *new* drivers submitted with this flag set.
> 
> I am wondering if we can add a WARN in the setup_irq function about this
> flag. May be it is a bit rough but people will pay attention.

s/rough/brutal :)

> Thanks
> 
>   -- Daniel
> 
> Index: clockevents/kernel/irq/manage.c
> ===================================================================
> --- clockevents.orig/kernel/irq/manage.c        2013-06-05
> 23:57:22.723446115 +0200
> +++ clockevents/kernel/irq/manage.c     2013-06-08 00:12:19.985035465 +0200
> @@ -1212,6 +1212,9 @@ int setup_irq(unsigned int irq, struct i
> 
>         if (WARN_ON(irq_settings_is_per_cpu_devid(desc)))
>                 return -EINVAL;
> +
> +       WARN(act->flags & IRQF_DISABLED, "IRQF_DISABLED flag is disabled");
> +
>         chip_bus_lock(desc);
>         retval = __setup_irq(irq, desc, act);
>         chip_bus_sync_unlock(desc);
> 


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