linux-kernel - Re: [PATCH linux-next] backlight: use sysfs

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Date:   Fri, 23 Sep 2022 14:04:03 -0700
From:   Han Jingoo <jingoohan1@...il.com>
To:     cgel.zte@...il.com
Cc:     lee@...nel.org, daniel.thompson@...aro.org, deller@....de,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, ye xingchen <ye.xingchen@....com.cn>
Subject: Re: [PATCH linux-next] backlight: use sysfs_emit() to instead of scnprintf()

On Thu, Sep 22, 2022 <cgel.zte@...il.com> wrote:
>
> From: ye xingchen <ye.xingchen@....com.cn>
>
> Replace the open-code with sysfs_emit() to simplify the code.
>
> Signed-off-by: ye xingchen <ye.xingchen@....com.cn>

Acked-by: Jingoo Han <jingoohan1@...il.com>

Best regards,
Jingoo Han

> ---
>  drivers/video/backlight/lm3533_bl.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
> index 1df1b6643c0b..5e2ce9285245 100644
> --- a/drivers/video/backlight/lm3533_bl.c
> +++ b/drivers/video/backlight/lm3533_bl.c
> @@ -66,7 +66,7 @@ static ssize_t show_id(struct device *dev,
>  {
>         struct lm3533_bl *bl = dev_get_drvdata(dev);
>
> -       return scnprintf(buf, PAGE_SIZE, "%d\n", bl->id);
> +       return sysfs_emit(buf, "%d\n", bl->id);
>  }
>
>  static ssize_t show_als_channel(struct device *dev,
> @@ -75,7 +75,7 @@ static ssize_t show_als_channel(struct device *dev,
>         struct lm3533_bl *bl = dev_get_drvdata(dev);
>         unsigned channel = lm3533_bl_get_ctrlbank_id(bl);
>
> -       return scnprintf(buf, PAGE_SIZE, "%u\n", channel);
> +       return sysfs_emit(buf, "%u\n", channel);
>  }
>
>  static ssize_t show_als_en(struct device *dev,
> @@ -95,7 +95,7 @@ static ssize_t show_als_en(struct device *dev,
>         mask = 1 << (2 * ctrlbank);
>         enable = val & mask;
>
> -       return scnprintf(buf, PAGE_SIZE, "%d\n", enable);
> +       return sysfs_emit(buf, "%d\n", enable);
>  }
>
>  static ssize_t store_als_en(struct device *dev,
> @@ -147,7 +147,7 @@ static ssize_t show_linear(struct device *dev,
>         else
>                 linear = 0;
>
> -       return scnprintf(buf, PAGE_SIZE, "%x\n", linear);
> +       return sysfs_emit(buf, "%x\n", linear);
>  }
>
>  static ssize_t store_linear(struct device *dev,
> @@ -190,7 +190,7 @@ static ssize_t show_pwm(struct device *dev,
>         if (ret)
>                 return ret;
>
> -       return scnprintf(buf, PAGE_SIZE, "%u\n", val);
> +       return sysfs_emit(buf, "%u\n", val);
>  }
>
>  static ssize_t store_pwm(struct device *dev,
> --
> 2.25.1