linux-kernel - Re: [PATCH 3/4] leds-lp5523: change the return type of lp5523_set

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Message-ID: <CAK5ve-J83jd4wGtkTdycuYpS6Yt3t8FqAQP_asQn-kXbgfP3fw@mail.gmail.com>
Date:	Wed, 22 Aug 2012 12:59:43 +0800
From:	Bryan Wu <bryan.wu@...onical.com>
To:	"Kim, Milo" <Milo.Kim@...com>
Cc:	Richard Purdie <rpurdie@...ys.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>
Subject: Re: [PATCH 3/4] leds-lp5523: change the return type of lp5523_set_mode()

On Tue, Aug 21, 2012 at 5:03 PM, Kim, Milo <Milo.Kim@...com> wrote:
> The return value of this function is not handled any place, so
> make it as void type.
>
> And three if-statements are replaced with switch-statements.
>

This one looks fine with me. I will merge it after you rework on first 2 patches

Thanks,
-Bryan

> Signed-off-by: Milo(Woogyom) Kim <milo.kim@...com>
> ---
>  drivers/leds/leds-lp5523.c |   24 +++++++++++++-----------
>  1 files changed, 13 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c
> index f090819..f8231f1 100644
> --- a/drivers/leds/leds-lp5523.c
> +++ b/drivers/leds/leds-lp5523.c
> @@ -150,7 +150,7 @@ static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led)
>                             leds[led->id]);
>  }
>
> -static int lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
> +static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
>  static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode);
>  static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern);
>
> @@ -789,26 +789,28 @@ static void lp5523_unregister_sysfs(struct i2c_client *client)
>  /*--------------------------------------------------------------*/
>  /*                     Set chip operating mode                 */
>  /*--------------------------------------------------------------*/
> -static int lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
> +static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode)
>  {
> -       int ret = 0;
> -
>         /* if in that mode already do nothing, except for run */
>         if (mode == engine->mode && mode != LP5523_CMD_RUN)
> -               return 0;
> +               return;
>
> -       if (mode == LP5523_CMD_RUN) {
> -               ret = lp5523_run_program(engine);
> -       } else if (mode == LP5523_CMD_LOAD) {
> +       switch (mode) {
> +       case LP5523_CMD_RUN:
> +               lp5523_run_program(engine);
> +               break;
> +       case LP5523_CMD_LOAD:
>                 lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
>                 lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
> -       } else if (mode == LP5523_CMD_DISABLED) {
> +               break;
> +       case LP5523_CMD_DISABLED:
>                 lp5523_set_engine_mode(engine, LP5523_CMD_DISABLED);
> +               break;
> +       default:
> +               return;
>         }
>
>         engine->mode = mode;
> -
> -       return ret;
>  }
>
>  /*--------------------------------------------------------------*/
> --
> 1.7.2.5
>
>
> Best Regards,
> Milo
>
>



-- 
Bryan Wu <bryan.wu@...onical.com>
Kernel Developer    +86.186-168-78255 Mobile
Canonical Ltd.      www.canonical.com
Ubuntu - Linux for human beings | www.ubuntu.com
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