linux-kernel - Re: [PATCH] platform: Fix platform device resource linking

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Message-Id: <CD23CDD8-5740-4649-8876-ADDFCFF30C35@antoniou-consulting.com>
Date:	Fri, 4 Jan 2013 00:43:46 +0200
From:	Pantelis Antoniou <panto@...oniou-consulting.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, Matt Porter <mporter@...com>,
	Russ Dill <Russ.Dill@...com>,
	Koen Kooi <koen@...inion.thruhere.net>
Subject: Re: [PATCH] platform: Fix platform device resource linking

Hi Greg,

On Jan 4, 2013, at 12:40 AM, Greg Kroah-Hartman wrote:

> On Fri, Jan 04, 2013 at 12:31:10AM +0200, Pantelis Antoniou wrote:
>> Platform device removal uncovered a number of problems with
>> the way resources are handled in the core platform code.
>> 
>> Resources now form child/parent linkages and this requires
>> proper linking of the resources. On top of that the OF core
>> directly creates it's own platform devices. Simplify things
>> by providing helper functions that manage the linking properly.
>> 
>> Two functions are provided:
>> 
>> platform_device_link_resources(), which links all the
>> linkable resources (if not already linked).
>> 
>> and platform_device_unlink_resources(), which unlinks all the
>> resources.
> 
> Who would call these functions, and why?
> 
> And why have we never seen problems with removing platform devices
> previously?
> 

Have you tried removing devices that were created via DT and 
not using platform data?

> thanks,
> 
> greg k-h

Regards

-- Pantelis

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