linux-kernel - Re: [PATCH 1/2] leds: use workqueue in led_set

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Message-ID: <CAKocOOOvOPYZnH0YK2jC2ze1=sQia2B1KcX6k0tviDDyf4vW=Q@mail.gmail.com>
Date:	Fri, 14 Sep 2012 16:25:00 -0600
From:	Shuah Khan <shuahkhan@...il.com>
To:	Bryan Wu <bryan.wu@...onical.com>
Cc:	rpurdie@...ys.net, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, linux-leds@...r.kernel.org,
	broonie@...nsource.wolfsonmicro.com, fabio.baltieri@...il.com,
	raph@...com, tpiepho@...escale.com
Subject: Re: [PATCH 1/2] leds: use workqueue in led_set_brightness() API internally

On Fri, Sep 14, 2012 at 1:53 AM, Bryan Wu <bryan.wu@...onical.com> wrote:
> The API function led_set_brightness() and __led_set_brightness will
> call .brightness_set() function provided by led class drivers. So
> .brightness_set() function will run in atomic context, which requires
> led class drivers use workqueue in .brightness_set().
>
> Finally, all the led class driver implemented their own workqueue in
> .brightness_set(). For those missing this, we will face runtime warning
> or error when running it in atomic context.
>
> This patch adds a workqueue in led_set_brightness() internally. LED
> class driver doesn't need to care about duplicated workqueue stuff in
> their own driver.
>
> Also this patch unified the led_set_brightness() and __led_set_brightness()
>
> Signed-off-by: Bryan Wu <bryan.wu@...onical.com>
> ---
>  drivers/leds/led-class.c          | 23 ++++++++++++-----------
>  drivers/leds/led-core.c           | 15 +++++++--------
>  drivers/leds/leds.h               | 11 ++---------
>  drivers/leds/ledtrig-backlight.c  |  8 ++++----
>  drivers/leds/ledtrig-default-on.c |  2 +-
>  drivers/leds/ledtrig-gpio.c       |  6 +++---
>  drivers/leds/ledtrig-heartbeat.c  |  2 +-
>  drivers/leds/ledtrig-oneshot.c    |  4 ++--
>  drivers/leds/ledtrig-transient.c  |  8 ++++----

Bryan,

ledtrig-transient.c change looks good. Thanks for updating it.

-- Shuah
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