Re: [alsa-devel] [PATCH] ASoC: fsl_ssi: free irq before irq_dispose_mapping()

From: Mark Brown
Date: Mon Dec 01 2014 - 14:24:51 EST

On Mon, Dec 01, 2014 at 05:49:56PM +0100, Lars-Peter Clausen wrote:
> On 12/01/2014 07:50 AM, Markus Pargmann wrote:

> >devm_request_irq() is used by other drivers too, this should not be a
> >problem. Looking at the code it seems that irq_dispose_mapping may not
> >be necessary with devm_request_irq(). So I think it would be better to
> >remove irq_dispose_mapping() instead.

> The driver creates the mapping by calling irq_of_parse_and_map(), so it also
> has to dispose the mapping. But the easy way out is to simply use
> platform_get_irq() instead of irq_of_parse_map(). In this case the mapping
> is not managed by the device but by the of core, so the device has not to
> dispose the mapping.

It also has the advantage of not being DT specific so providing some
chance that future firmware interfaces can be supported without driver

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