Re: [alsa-devel] [PATCH] ASoC: sgtl5000: Use devm_ functions

From: Mark Brown
Date: Tue Jul 08 2014 - 10:56:11 EST

On Tue, Jul 08, 2014 at 10:15:20AM +0200, Julia Lawall wrote:
> On Tue, 8 Jul 2014, Mark Brown wrote:

> > It should be fairly clear given what they do I'd have thought - the
> > devm_ functions tie the deallocation of a resource to the unbinding of
> > a driver from a device so they can only be used to replace things that
> > get cleaned up in a device model unbind path. There's not usually a
> > great deal of indirection going on in those.

> It is completely clear what they do. What is not clear is what device
> libraries are set up to call the freeing functions at what point. For
> example, I know that that platform drivers are set up for this, but once I
> tried to find the lines of code that would justify that, but I could not.
> Perhaps I was not patient enough or missed something.

All devices do this - it's done as part of the driver model core code so
there is no need for individual buses to do anything.

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