From: Arnd Bergmann <arnd@arndb.de>
To: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org,
ulf.hansson@linaro.org, nicolas.ferre@atmel.com,
chris@printf.net
Subject: Re: [PATCH 2/3] mmc: atmel-mci: stop using specific initcall
Date: Thu, 20 Nov 2014 15:13:30 +0100 [thread overview]
Message-ID: <2872000.LCAfuO7RlQ@wuerfel> (raw)
In-Reply-To: <20141120140125.GI3639@ldesroches-Latitude-E6320>
On Thursday 20 November 2014 15:01:25 Ludovic Desroches wrote:
> On Thu, Nov 20, 2014 at 12:10:25PM +0100, Arnd Bergmann wrote:
> > On Thursday 20 November 2014 11:07:54 Ludovic Desroches wrote:
> > > No more use late initcall to manage probing order. Use probe deferring
> > > if needed. Then use module_platform_driver and clean init/exit
> > > attributes.
> > >
> > > Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
> > >
> >
> > Do we need this backported into stable kernels? It seems that
> > the __init/__exit annotations will break things if you ever
> > tried to unbind the device or run into deferred probing on
> > earlier kernels.
>
> Well, it is a bit complicated, if we backport it, then the mci driver
> could be probed before the dma controller. Requesting dma chan will fail
> and it will switch to pio mode.
>
> So it has to be backported with the probe deferring. The issue is
> that probe deferring patch is based on other patches removing non-dt
> support which become useless only ine 3.19.
>
Should we just have the __init/__exit removal in backports then?
Arnd
next prev parent reply other threads:[~2014-11-20 14:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-20 10:07 [PATCH 1/3] mmc: atmel-mci: remove useless DMA stuff for non-dt devices Ludovic Desroches
2014-11-20 10:07 ` [PATCH 2/3] mmc: atmel-mci: stop using specific initcall Ludovic Desroches
2014-11-20 11:10 ` Arnd Bergmann
2014-11-20 14:01 ` Ludovic Desroches
2014-11-20 14:13 ` Arnd Bergmann [this message]
2014-11-20 14:18 ` Ludovic Desroches
2014-11-20 15:25 ` Arnd Bergmann
2014-11-20 10:07 ` [PATCH 3/3] mmc: atmel-mci: use probe deferring if dma controller is not ready yet Ludovic Desroches
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