linux-kernel - Re: [PATCH 8/8] ARM: tegra: HACK: remove set_irq

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Date:	Thu, 1 Mar 2012 20:40:17 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Alan Ott <alan@...nal11.us>, Russell King <linux@....linux.org.uk>,
	Colin Cross <ccross@...roid.com>,
	Olof Johansson <olof@...om.net>,
	Stephen Warren <swarren@...dia.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Alan Stern <stern@...land.harvard.edu>,
	"Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
	Lucas De Marchi <lucas.demarchi@...fusion.mobi>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-tegra@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH 8/8] ARM: tegra: HACK: remove set_irq_flags() from driver

On Thursday 01 March 2012, Linus Walleij wrote:
> The kernel is full of this kind of stuff (drivers/mfd/twl4030-irq.c):
> 
> #ifdef CONFIG_ARM
>         /* ARM requires an extra step to clear IRQ_NOREQUEST, which it
>          * sets on behalf of every irq_chip.  Also sets IRQ_NOPROBE.
>          */
>         set_irq_flags(irq, IRQF_VALID);
> #else
>         /* same effect on other architectures */
>         irq_set_noprobe(irq);
> #endif

That is the implementation of an irq_chip, not a random device driver.

	Arnd
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