linux-kernel - Re: [PATCH] platform/x86: thinkpad_acpi: change sprintf() to sysfs

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Date: Mon, 22 Apr 2024 15:39:16 +0200
From: Hans de Goede <hdegoede@...hat.com>
To: yunshui <jiangyunshui@...inos.cn>, linux-kernel@...r.kernel.org
Cc: platform-driver-x86@...r.kernel.org, hmh@....eng.br,
 ilpo.jarvinen@...ux.intel.com, Ai Chao <aichao@...inos.cn>
Subject: Re: [PATCH] platform/x86: thinkpad_acpi: change sprintf() to
 sysfs_emit()

Hi,

On 4/17/24 11:20 AM, yunshui wrote:
> As Documentation/filesystems/sysfs.rst suggested,
> show() should only use sysfs_emit() or sysfs_emit_at() when formatting
> the value to be returned to user space.
> 
> Signed-off-by: yunshui <jiangyunshui@...inos.cn>
> Signed-off-by: Ai Chao <aichao@...inos.cn>
> ---
>  drivers/platform/x86/thinkpad_acpi.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
> index 82429e59999d..1ed27fc21a7d 100644
> --- a/drivers/platform/x86/thinkpad_acpi.c
> +++ b/drivers/platform/x86/thinkpad_acpi.c
> @@ -817,7 +817,7 @@ static int __init setup_acpi_notify(struct ibm_struct *ibm)
>  	}
>  
>  	ibm->acpi->device->driver_data = ibm;
> -	sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
> +	sysfs_emit(acpi_device_class(ibm->acpi->device), "%s/%s",
>  		TPACPI_ACPI_EVENT_PREFIX,
>  		ibm->name);
> 

This is not a sysfs show() function.

 
> @@ -857,7 +857,7 @@ static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
>  		return -ENOMEM;
>  	}
>  
> -	sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
> +	sysfs_emit(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
>  	ibm->acpi->driver->ids = ibm->acpi->hid;
>  
>  	ibm->acpi->driver->ops.add = &tpacpi_device_add;

This also is not a sysfs show() function.

I've dropped these 2 parts of the patch while applying it:

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




> @@ -2679,7 +2679,7 @@ static ssize_t hotkey_bios_enabled_show(struct device *dev,
>  			   struct device_attribute *attr,
>  			   char *buf)
>  {
> -	return sprintf(buf, "0\n");
> +	return sysfs_emit(buf, "0\n");
>  }
>  
>  static DEVICE_ATTR_RO(hotkey_bios_enabled);
> @@ -9789,7 +9789,7 @@ static ssize_t tpacpi_battery_show(int what,
>  		battery = BAT_PRIMARY;
>  	if (tpacpi_battery_get(what, battery, &ret))
>  		return -ENODEV;
> -	return sprintf(buf, "%d\n", ret);
> +	return sysfs_emit(buf, "%d\n", ret);
>  }
>  
>  static ssize_t charge_control_start_threshold_show(struct device *device,