linux-kernel - Re: [PATCH 12/24] media/video: fix dangling pointers

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Date:	Mon, 22 Mar 2010 21:51:18 +0000
From:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Hans Verkuil <hverkuil@...all.nl>,
	Wolfram Sang <w.sang@...gutronix.de>,
	kernel-janitors@...r.kernel.org, linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-media@...r.kernel.org
Subject: Re: [PATCH 12/24] media/video: fix dangling pointers

On Mon, Mar 22, 2010 at 09:33:58PM +0100, Jean Delvare wrote:
> On Sun, 21 Mar 2010 17:09:56 +0100, Hans Verkuil wrote:
> > On Sunday 21 March 2010 15:14:17 Mark Brown wrote:

> > > I agree with this.  There are also some use cases where the device data
> > > is actually static (eg, a generic description of the device or a
> > > reference to some other shared resource rather than per device allocated
> > > data).

> From a technical perspective, there is little rationale to have the
> client data pointed to static data. If you could reach it from probe(),
> it has to be a global, and if it is a global, you can reach it again
> directly from the rest of your code.

The use case I can think of there is bus type specific stuff for devices
that support multiple buses.
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