From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <stable-owner@vger.kernel.org>
Received: from out4-smtp.messagingengine.com ([66.111.4.28]:54785 "EHLO
        out4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK)
        by vger.kernel.org with ESMTP id S1751226AbcKIGLf (ORCPT
        <rfc822;stable@vger.kernel.org>); Wed, 9 Nov 2016 01:11:35 -0500
Date: Wed, 9 Nov 2016 07:11:45 +0100
From: Greg KH <greg@kroah.com>
To: Stefan Agner <stefan@agner.ch>
Cc: stable@vger.kernel.org, Wolfram Sang <wsa@the-dreams.de>,
        stable@kernel.org
Subject: Re: [PATCH] i2c: imx: defer probe if bus recovery GPIOs are not ready
Message-ID: <20161109061145.GB2739@kroah.com>
References: <20161109003239.16940-1-stefan@agner.ch>
 <847750bba7bed752906f75f5df3f8344@agner.ch>
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <847750bba7bed752906f75f5df3f8344@agner.ch>
Sender: stable-owner@vger.kernel.org
List-ID: <stable.vger.kernel.org>

On Tue, Nov 08, 2016 at 04:34:50PM -0800, Stefan Agner wrote:
> On 2016-11-08 16:32, Stefan Agner wrote:
> > commit 533169d164c6b4c8571d0d48779f6ff6be593d72 upstream.
> > 
> > Some SoC might load the GPIO driver after the I2C driver and
> > using the I2C bus recovery mechanism via GPIOs. In this case
> > it is crucial to defer probing if the GPIO request functions
> > do so, otherwise the I2C driver gets loaded without recovery
> > mechanisms enabled.
> > 
> > Signed-off-by: Stefan Agner <stefan@agner.ch>
> > Acked-by: Uwe Kleine-K�nig <u.kleine-koenig@pengutronix.de>
> > Acked-by: Li Yang <leoyang.li@nxp.com>
> > Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
> > Cc: stable@kernel.org
> 
> I forgot to mention, this should be applied to 4.4 only.

Did you build the code there?

> Later versions made the return value void, and it would require a larger
> rework. I am mainly concerned about LTS...

I don't see this working for either 4.4 or 4.8-stable right now, do you?

confused,

greg k-h