linux-kernel - Re: [PATCH] mfd wm8350: allocate irq descs dynamically

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Message-ID: <20110602133743.GA4253@sirena.org.uk>
Date:	Thu, 2 Jun 2011 14:37:44 +0100
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	Samuel Ortiz <sameo@...ux.intel.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd wm8350: allocate irq descs dynamically

On Thu, Jun 02, 2011 at 12:53:49PM +0100, Mark Brown wrote:
> On Thu, Jun 02, 2011 at 01:45:02PM +0200, Sascha Hauer wrote:
> > 
> > This allows boards to leave the irq_base field unitialized and
> > prevents them having to reserve irqs in the platform.
> > pdata can be optional for irq support now. Without pdata the
> > driver allocates some free irq range. With pdata and irq_base > 0
> > the driver allocates exactly the specified irq.
> > Without pdata the irq defaults to IRQF_TRIGGER_LOW.

> > Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>

> Acked-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>

Actually I take that back, it looks like the wm831x equivalent patch is
causing some sort of semi-intermittent issue with the IRQ infrastructure
on non-sparse systems so I suspect this patch is also problematic.  The
major symptom is lockups in softirq handling.
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