linux-kernel - Re: [PATCH RFT 1/2] gpio: gpio-ml-ioh: Use spinlock for register access protection

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Date:	Wed, 15 Aug 2012 00:18:47 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org, Feng Tang <feng.tang@...el.com>,
	Tomoya MORINAGA <tomoya.rohm@...il.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCH RFT 1/2] gpio: gpio-ml-ioh: Use spinlock for register
 access protection

On Sun, Jul 29, 2012 at 4:54 AM, Axel Lin <axel.lin@...il.com> wrote:

> gpio_chip.can_sleep is 0, but current code uses mutex in ioh_gpio_set,
> ioh_gpio_get and ioh_gpio_direction_input functions.
> Thus those functions are not callable from interrupt context.
> This patch converts mutex into spinlock.
>
> Signed-off-by: Axel Lin <axel.lin@...il.com>

Applied to my devel branch for the next merge window, it doesn't
seem like a regression to me atleast.

Yours,
Linus Walleij
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