linux-kernel - Re: [PATCH] platform/x86/fujitsu-laptop: Replace sprintf() with sysfs

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Date: Mon, 29 Apr 2024 10:30:02 +0930
From: Jonathan Woithe <jwoithe@...t42.net>
To: Szilard Fabian <szfabian@...emarch.art>
Cc: linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        hdegoede@...hat.com, ilpo.jarvinen@...ux.intel.com
Subject: Re: [PATCH] platform/x86/fujitsu-laptop: Replace sprintf() with
 sysfs_emit()

On Sun, Apr 28, 2024 at 07:26:33PM +0000, Szilard Fabian wrote:
> As suggested by Documentation/filesystems/sysfs.rst sysfs_emit() should be
> used when formatting the value to be returned to user space.
> 
> Signed-off-by: Szilard Fabian <szfabian@...emarch.art>

This seems entirely reasonable.

Acked-by: Jonathan Woithe <jwoithe@...t42.net>

> ---
>  drivers/platform/x86/fujitsu-laptop.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
> index 94480af49467..968fc91bd5e4 100644
> --- a/drivers/platform/x86/fujitsu-laptop.c
> +++ b/drivers/platform/x86/fujitsu-laptop.c
> @@ -386,11 +386,11 @@ static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
>  	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
>  
>  	if (!(priv->flags_supported & FLAG_LID))
> -		return sprintf(buf, "unknown\n");
> +		return sysfs_emit(buf, "unknown\n");
>  	if (priv->flags_state & FLAG_LID)
> -		return sprintf(buf, "open\n");
> +		return sysfs_emit(buf, "open\n");
>  	else
> -		return sprintf(buf, "closed\n");
> +		return sysfs_emit(buf, "closed\n");
>  }
>  
>  static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
> @@ -399,11 +399,11 @@ static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
>  	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
>  
>  	if (!(priv->flags_supported & FLAG_DOCK))
> -		return sprintf(buf, "unknown\n");
> +		return sysfs_emit(buf, "unknown\n");
>  	if (priv->flags_state & FLAG_DOCK)
> -		return sprintf(buf, "docked\n");
> +		return sysfs_emit(buf, "docked\n");
>  	else
> -		return sprintf(buf, "undocked\n");
> +		return sysfs_emit(buf, "undocked\n");
>  }
>  
>  static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
> @@ -412,11 +412,11 @@ static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
>  	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
>  
>  	if (!(priv->flags_supported & FLAG_RFKILL))
> -		return sprintf(buf, "unknown\n");
> +		return sysfs_emit(buf, "unknown\n");
>  	if (priv->flags_state & FLAG_RFKILL)
> -		return sprintf(buf, "on\n");
> +		return sysfs_emit(buf, "on\n");
>  	else
> -		return sprintf(buf, "killed\n");
> +		return sysfs_emit(buf, "killed\n");
>  }
>  
>  static DEVICE_ATTR_RO(lid);
> -- 
> 2.44.0
> 
>