linux-kernel - Re: [PATCH 1/3] spi: bitbang: Replace spinlock by mutex when calling chipselect

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Message-ID: <20150814191920.GK10748@sirena.org.uk>
Date:	Fri, 14 Aug 2015 20:19:20 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Nicolas Boichat <drinkcat@...omium.org>
Cc:	Kukjin Kim <kgene@...nel.org>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH 1/3] spi: bitbang: Replace spinlock by mutex when calling
 chipselect

On Wed, Aug 05, 2015 at 06:24:05PM +0800, Nicolas Boichat wrote:

> Anyway, the "safer" way to fix this would be to keep the
> prepare/unprepare functions, busy variable, and just protect it with a
> mutex instead of a spinlock...

OK, that seems reasonable.

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