linux-kernel - Re: Shared i2c adapter locking

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Message-Id: <1257429444.2793.2.camel@achroite.uk.solarflarecom.com>
Date:	Thu, 05 Nov 2009 13:57:24 +0000
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Jean Delvare <khali@...ux-fr.org>
Cc:	Stephen Rothwell <sfr@...b.auug.org.au>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Mika Kuoppala <mika.kuoppala@...ia.com>,
	Linux I2C <linux-i2c@...r.kernel.org>
Subject: Re: Shared i2c adapter locking

On Thu, 2009-11-05 at 14:11 +0100, Jean Delvare wrote:
[...]
> What about the following patch?
> 
> From: Jean Delvare <khali@...ux-fr.org>
> Subject: i2c: Add an interface to lock/unlock I2C bus segment
> 
> Some drivers need to be able to prevent access to an I2C bus segment
> for a specific period of time. Add an interface for them to do so
> without twiddling with i2c-core internals.
> 
> Signed-off-by: Jean Delvare <khali@...ux-fr.org>
> Cc: Ben Hutchings <bhutchings@...arflare.com>
Acked-by: Ben Hutchings <bhutchings@...arflare.com>

Presumably this is meant for net-next-2.6, and you'll implement
i2c_{lock,unlock}_adapter() using rt_mutex in your i2c tree?

Ben.

-- 
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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