linux-kernel - Re: [PATCH] i2c: axxia: Add I2C driver for AXM55xx

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Date:	Mon, 22 Sep 2014 14:03:51 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Wolfram Sang <wsa@...-dreams.de>
Cc:	Anders Berg <anders.berg@...gotech.com>,
	devicetree <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>, linux-i2c@...r.kernel.org
Subject: Re: [PATCH] i2c: axxia: Add I2C driver for AXM55xx

On Mon, Sep 22, 2014 at 11:59:39AM +0200, Wolfram Sang wrote:
> IRQ_NONE is "this interrupt wasn't by me" so for shared IRQs, the next
> handler can check.

Err, no it isn't.  IRQ_NONE has no such effect.  All handlers on a
shared interrupt are always run irrespective of the return value from
any particular interrupt handler.  See kernel/irq/handle.c.

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