linux-kernel - Re: [PATCH 2/2] i2c: designware: make i2c xfers non-interruptible

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Message-ID: <20130607075527.GB11875@ab42.lan>
Date:	Fri, 7 Jun 2013 09:55:29 +0200
From:	Christian Ruppert <christian.ruppert@...lis.com>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Wolfram Sang <wsa@...-dreams.de>,
	Jean Delvare <khali@...ux-fr.org>,
	Pierrick Hascoet <pierrick.hascoet@...lis.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] i2c: designware: make i2c xfers non-interruptible

On Fri, Jun 07, 2013 at 08:25:55AM +0300, Mika Westerberg wrote:
> On Thu, Jun 06, 2013 at 03:43:36PM +0200, Christian Ruppert wrote:
> > When the process at the source of an i2c transfer is killed in the
> > middle of the transfer, the transfer is interrupted. Interrupted
> > transfers might cause buggy slaves on the bus (or higher level drivers)
> > to go haywire.
> > This patch forces ongoing i2c transfers to finish properly, even if the
> > initiating process is killed.
> 
> I already sent a similar patch ;-)
> 
> https://patchwork.kernel.org/patch/2601241/
> 
> However, it is not yet picked by Wolfram.

Oops, this looks like a human race condition :) I checked main line and
Wolfram's git but didn't think of checking patchwork. I'll rebase the
second patch on yours.

-- 
  Christian Ruppert              ,          <christian.ruppert@...lis.com>
                                /|
  Tel: +41/(0)22 816 19-42     //|                 3, Chemin du Pré-Fleuri
                             _// | bilis Systems   CH-1228 Plan-les-Ouates
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