linux-kernel - Re: [PATCH 0/2] change "client->irq >= 0" to "client->irq

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Date:	Wed, 3 Jun 2015 13:02:41 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Octavian Purdila <octavian.purdila@...el.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Jonathan Cameron <jic23@...nel.org>,
	Hartmut Knaack <knaack.h@....de>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Peter Meerwald <pmeerw@...erw.net>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	linux-iio@...r.kernel.org, rtc-linux@...glegroups.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] change "client->irq >= 0" to "client->irq > 0"

On 03/06/2015 at 00:34:11 +0300, Octavian Purdila wrote :
> This fixes an issue introduces by commit dab472eb931b ("i2c / ACPI:
> Use 0 to indicate that device does not have interrupt assigned") where
> drivers will try to request IRQ 0 when no GpioInt is defined in ACPI.
> 
> The same issue occurs when the device is instantiated via device tree
> with no IRQ, or from the i2c sysfs interface, even before the patch
> above.
> 
> Linus, since the commit above was already merged in the GPIO tree,
> should these fixes be merged also via the GPIO tree (with ACKs from
> the others subsystem maintainers)?
> 

Side question, has it been considered that IRQ 0 is valid on some
platform and that means i2c devices will not be able to be wired to that
IRQ anymore? Though, I don't think there are any existing design that
does so.


-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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