linux-kernel - Re: [PATCH] platform/x86: sony-laptop: Convert to use sysfs_emit

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Date:   Thu, 8 Dec 2022 17:32:28 +0100
From:   Hans de Goede <hdegoede@...hat.com>
To:     ye.xingchen@....com.cn
Cc:     malattia@...ux.it, markgross@...nel.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] platform/x86: sony-laptop: Convert to use sysfs_emit_at()
 API

Hi,

On 12/8/22 08:45, ye.xingchen@....com.cn wrote:
> From: ye xingchen <ye.xingchen@....com.cn>
> 
> Follow the advice of the Documentation/filesystems/sysfs.rst and show()
> should only use sysfs_emit() or sysfs_emit_at() when formatting the
> value to be returned to user space.
> 
> Signed-off-by: ye xingchen <ye.xingchen@....com.cn>

Thank you for your patch, I've applied this patch to my review-hans 
branch:
https://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86.git/log/?h=review-hans

Note it will show up in my review-hans branch once I've pushed my
local branch there, which might take a while.

Once I've run some tests on this branch the patches there will be
added to the platform-drivers-x86/for-next branch and eventually
will be included in the pdx86 pull-request to Linus for the next
merge-window.

Regards,

Hans


> ---
>  drivers/platform/x86/sony-laptop.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/platform/x86/sony-laptop.c b/drivers/platform/x86/sony-laptop.c
> index a19aac70252f..7156ae2ad196 100644
> --- a/drivers/platform/x86/sony-laptop.c
> +++ b/drivers/platform/x86/sony-laptop.c
> @@ -820,10 +820,9 @@ static ssize_t sony_nc_handles_show(struct device *dev,
>  	int i;
> 
>  	for (i = 0; i < ARRAY_SIZE(handles->cap); i++) {
> -		len += scnprintf(buffer + len, PAGE_SIZE - len, "0x%.4x ",
> -				handles->cap[i]);
> +		len += sysfs_emit_at(buffer, len, "0x%.4x ", handles->cap[i]);
>  	}
> -	len += scnprintf(buffer + len, PAGE_SIZE - len, "\n");
> +	len += sysfs_emit_at(buffer, len, "\n");
> 
>  	return len;
>  }
> @@ -2173,10 +2172,9 @@ static ssize_t sony_nc_thermal_profiles_show(struct device *dev,
> 
>  	for (cnt = 0; cnt < THM_PROFILE_MAX; cnt++) {
>  		if (!cnt || (th_handle->profiles & cnt))
> -			idx += scnprintf(buffer + idx, PAGE_SIZE - idx, "%s ",
> -					snc_thermal_profiles[cnt]);
> +			idx += sysfs_emit_at(buffer, idx, "%s ", snc_thermal_profiles[cnt]);
>  	}
> -	idx += scnprintf(buffer + idx, PAGE_SIZE - idx, "\n");
> +	idx += sysfs_emit_at(buffer, idx, "\n");
> 
>  	return idx;
>  }