linux-kernel - Re: [PATCH] spi: atmel: Fix crash when using more than 4 gpio CS

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Message-ID: <20190919160315.GQ3642@sirena.co.uk>
Date:   Thu, 19 Sep 2019 17:03:15 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Gregory CLEMENT <gregory.clement@...tlin.com>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>,
        linux-arm-kernel@...ts.infradead.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH] spi: atmel: Fix crash when using more than 4 gpio CS

On Thu, Sep 19, 2019 at 05:38:47PM +0200, Gregory CLEMENT wrote:

> With this patch, when using a gpio CS, the hardware CS0 is always
> used. Thanks to this, there is no more limitation for the number of
> gpio CS we can use.

This is going to break any system where we use both a GPIO chip select
and chip select 0.  Ideally we'd try to figure out an unused chip select
to use here...

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