linux-kernel - Re: Backport of spi-fsl-spi bugfix to 3.14.y

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Message-ID: <20150123124529.GU21293@sirena.org.uk>
Date:	Fri, 23 Jan 2015 12:45:29 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Esben Haabendal <esben.haabendal@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-spi@...r.kernel.org, Stefan Roese <sr@...x.de>
Subject: Re: Backport of spi-fsl-spi bugfix to 3.14.y

On Tue, Jan 06, 2015 at 10:15:47PM +0100, Esben Haabendal wrote:
> On 5 January 2015 at 16:48, Mark Brown <broonie@...nel.org> wrote:

> >> Please consider commit 4302a59629f7a0bd70fd1605d2b558597517372a
> >> (spi: fsl: Fix problem with multi message transfers) for inclusion in
> >> stable kernel 3.14.

> >> It fixes a regression when using mmc_spi driver on top of spi-fsl-spi
> >> driver (tested with powerpc mpc8313 based board).

> > Has this ever worked?

> Yes, I have used mmc_spi with spi-fsl-spi on the same board with success
> with in 2.6.33, 3.0 and 3.4.

> I have no idea what has caused this to break.  Maybe mmc_spi driver was
> not doing multi message transfers earlier?

So, I now see this has actually been merged into stable without getting
to the bottom of why it's helping anything...  this is a bit worrying
since it's adding new functionality and not really a bug fix.  It'd have
been good to at least get a followup here.

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