linux-kernel - RE: [PATCH] platform/x86: use sysfs

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Message-ID: <PH7PR84MB1813085F3E95CC084D5E605B87179@PH7PR84MB1813.NAMPRD84.PROD.OUTLOOK.COM>
Date:   Fri, 2 Dec 2022 17:48:38 +0000
From:   "Ernst, Justin" <justin.ernst@....com>
To:     "ye.xingchen@....com.cn" <ye.xingchen@....com.cn>,
        "hdegoede@...hat.com" <hdegoede@...hat.com>
CC:     "markgross@...nel.org" <markgross@...nel.org>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] platform/x86: use sysfs_emit() to instead of scnprintf()

> 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 the patch and for keeping me informed.

Reviewed-by: Justin Ernst <justin.ernst@....com>

> ---
>  drivers/platform/x86/uv_sysfs.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/platform/x86/uv_sysfs.c b/drivers/platform/x86/uv_sysfs.c
> index 625b0b79d185..73fc38ee7430 100644
> --- a/drivers/platform/x86/uv_sysfs.c
> +++ b/drivers/platform/x86/uv_sysfs.c
> @@ -119,12 +119,12 @@ struct uv_hub {
> 
>  static ssize_t hub_name_show(struct uv_bios_hub_info *hub_info, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "%s\n", hub_info->name);
> +	return sysfs_emit(buf, "%s\n", hub_info->name);
>  }
> 
>  static ssize_t hub_location_show(struct uv_bios_hub_info *hub_info, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "%s\n", hub_info->location);
> +	return sysfs_emit(buf, "%s\n", hub_info->location);
>  }
> 
>  static ssize_t hub_partition_show(struct uv_bios_hub_info *hub_info, char *buf)
> @@ -460,12 +460,12 @@ struct uv_pci_top_obj {
> 
>  static ssize_t uv_pci_type_show(struct uv_pci_top_obj *top_obj, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "%s\n", top_obj->type);
> +	return sysfs_emit(buf, "%s\n", top_obj->type);
>  }
> 
>  static ssize_t uv_pci_location_show(struct uv_pci_top_obj *top_obj, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "%s\n", top_obj->location);
> +	return sysfs_emit(buf, "%s\n", top_obj->location);
>  }
> 
>  static ssize_t uv_pci_iio_stack_show(struct uv_pci_top_obj *top_obj, char *buf)
> @@ -475,7 +475,7 @@ static ssize_t uv_pci_iio_stack_show(struct uv_pci_top_obj *top_obj, char *buf)
> 
>  static ssize_t uv_pci_ppb_addr_show(struct uv_pci_top_obj *top_obj, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "%s\n", top_obj->ppb_addr);
> +	return sysfs_emit(buf, "%s\n", top_obj->ppb_addr);
>  }
> 
>  static ssize_t uv_pci_slot_show(struct uv_pci_top_obj *top_obj, char *buf)
> @@ -737,7 +737,7 @@ static ssize_t coherence_id_show(struct kobject *kobj,
>  static ssize_t uv_type_show(struct kobject *kobj,
>  			struct kobj_attribute *attr, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "%s\n", uv_type_string());
> +	return sysfs_emit(buf, "%s\n", uv_type_string());
>  }
> 
>  static ssize_t uv_archtype_show(struct kobject *kobj,
> @@ -749,13 +749,13 @@ static ssize_t uv_archtype_show(struct kobject *kobj,
>  static ssize_t uv_hub_type_show(struct kobject *kobj,
>  			struct kobj_attribute *attr, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "0x%x\n", uv_hub_type());
> +	return sysfs_emit(buf, "0x%x\n", uv_hub_type());
>  }
> 
>  static ssize_t uv_hubless_show(struct kobject *kobj,
>  			struct kobj_attribute *attr, char *buf)
>  {
> -	return scnprintf(buf, PAGE_SIZE, "0x%x\n", uv_get_hubless_system());
> +	return sysfs_emit(buf, "0x%x\n", uv_get_hubless_system());
>  }
> 
>  static struct kobj_attribute partition_id_attr =
> --
> 2.25.1