linux-kernel - Re: [PATCH] genirq: irq_chip->startup() usage in setup_irq and set_irq

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Message-ID: <20080823160859.GE27974@elte.hu>
Date:	Sat, 23 Aug 2008 18:08:59 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Pawel MOLL <pawel.moll@...com>
Cc:	linux-kernel@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH] genirq: irq_chip->startup() usage in setup_irq and
	set_irq_chained handler


* Pawel MOLL <pawel.moll@...com> wrote:

> Hi, Ingo,
> 
> Apparently I have swapped To: and Cc: field in the original mail,
> apologies.
> 
> > This patch clarifies a usage of irq_chip->startup() callback:
> > 
> > 1. The "if (startup) startup(); else enabled();" code in setup_irq()
> >    is unnecessary, as startup() falls back to enabled() via
> >    default callbacks, set by irq_chip_set_defaults().
> > 
> > 2. When using set_irq_chained_handler() the startup() was never called,
> >    which is not good at all... Fixed. And again - when startup() is not
> >    defined the call will fall back to enable() than to unmask() via
> >    default callbacks.
> 
> Any comment on the patch?

looks good to me at first glance - but i Cc:-ed Thomas and Ben, maybe 
they have further comments.

	Ingo
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