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

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Message-ID: <CACRpkdYQZfun29PQxq1r1y1s04FJKzcmUENTh0mt4t3szRLcgg@mail.gmail.com>
Date:	Wed, 15 Aug 2012 00:20:07 +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 2/2] gpio: gpio-pch: Use spinlock for register access protection

On Sun, Jul 29, 2012 at 4:55 AM, Axel Lin <axel.lin@...il.com> wrote:

> gpio_chip.can_sleep is 0, but current code uses mutex in pch_gpio_set
> pch_gpio_get and pch_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...

Yours,
Linus Walleij
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