linux-kernel - Re: [PATCH 1/1] [media] ite-cir: postpone ISR registration

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Message-ID: <20120419204444.GB5165@redhat.com>
Date:	Thu, 19 Apr 2012 16:44:44 -0400
From:	Jarod Wilson <jarod@...hat.com>
To:	Luis Henriques <luis.henriques@...onical.com>
Cc:	Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] [media] ite-cir: postpone ISR registration

On Wed, Apr 18, 2012 at 09:54:07PM +0100, Luis Henriques wrote:
> An early registration of an ISR was causing a crash to several users (for
> example here: http://bugs.launchpad.net/bugs/972723  The reason was that
> IRQs were being triggered before the driver initialisation was completed.
> 
> This patch fixes this by moving the invocation to request_irq() to a later
> stage on the driver probe function.

Ugh. Looks like we actually have a similar problem with multiple lpc super
i/o based CIR drivers. I'd probably move both the irq and io region
requests in ite-cir, fintek-cir, nuvoton-cir, ene_ir and winbond-cir. If
I'm thinking clearly, I've actually seen a very similar report for one of
the other CIR drivers recently. Good catch. But yeah, lets do the same for
all the drivers, and move request_region as well.

-- 
Jarod Wilson
jarod@...hat.com

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