[PATCH] platform/x86: eeepc-laptop: use sysfs_emit() instead of sprintf()

[PATCH] platform/x86: eeepc-laptop: use sysfs_emit() instead of sprintf()

[chen zhang]

Follow the advice in Documentation/filesystems/sysfs.rst:
show() should only use sysfs_emit() or sysfs_emit_at() when formatting
the value to be returned to user space.

Signed-off-by: chen zhang <chenzhang@kylinos.cn>
---
 drivers/platform/x86/eeepc-laptop.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
index 03319a80e114..ba36b7bf6dc4 100644
--- a/drivers/platform/x86/eeepc-laptop.c
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -285,7 +285,7 @@ static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
 
 	if (value < 0)
 		return -EIO;
-	return sprintf(buf, "%d\n", value);
+	return sysfs_emit(buf, "%d\n", value);
 }
 
 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm)				\
@@ -361,7 +361,7 @@ static ssize_t cpufv_show(struct device *dev,
 
 	if (get_cpufv(eeepc, &c))
 		return -ENODEV;
-	return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
+	return sysfs_emit(buf, "%#x\n", (c.num << 8) | c.cur);
 }
 
 static ssize_t cpufv_store(struct device *dev,
@@ -393,7 +393,7 @@ static ssize_t cpufv_disabled_show(struct device *dev,
 {
 	struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 
-	return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
+	return sysfs_emit(buf, "%d\n", eeepc->cpufv_disabled);
 }
 
 static ssize_t cpufv_disabled_store(struct device *dev,
@@ -1025,7 +1025,7 @@ static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 
 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 {
-	return sprintf(buf, "%d\n", get());
+	return sysfs_emit(buf, "%d\n", get());
 }
 
 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get)				\
-- 
2.25.1

Re: [PATCH] platform/x86: eeepc-laptop: use sysfs_emit() instead of sprintf()

[Ilpo Järvinen]

On Fri, 18 Oct 2024, chen zhang wrote:

> Follow the advice in Documentation/filesystems/sysfs.rst:
> show() should only use sysfs_emit() or sysfs_emit_at() when formatting
> the value to be returned to user space.
> 
> Signed-off-by: chen zhang <chenzhang@kylinos.cn>
> ---
>  drivers/platform/x86/eeepc-laptop.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
> index 03319a80e114..ba36b7bf6dc4 100644
> --- a/drivers/platform/x86/eeepc-laptop.c
> +++ b/drivers/platform/x86/eeepc-laptop.c
> @@ -285,7 +285,7 @@ static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
>  
>  	if (value < 0)
>  		return -EIO;
> -	return sprintf(buf, "%d\n", value);
> +	return sysfs_emit(buf, "%d\n", value);

Please add also #include <linux/sysfs.h> and include the correct list 
among receipients when sending v2.

-- 
 i.


>  }
>  
>  #define EEEPC_ACPI_SHOW_FUNC(_name, _cm)				\
> @@ -361,7 +361,7 @@ static ssize_t cpufv_show(struct device *dev,
>  
>  	if (get_cpufv(eeepc, &c))
>  		return -ENODEV;
> -	return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
> +	return sysfs_emit(buf, "%#x\n", (c.num << 8) | c.cur);
>  }
>  
>  static ssize_t cpufv_store(struct device *dev,
> @@ -393,7 +393,7 @@ static ssize_t cpufv_disabled_show(struct device *dev,
>  {
>  	struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
>  
> -	return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
> +	return sysfs_emit(buf, "%d\n", eeepc->cpufv_disabled);
>  }
>  
>  static ssize_t cpufv_disabled_store(struct device *dev,
> @@ -1025,7 +1025,7 @@ static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
>  
>  static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
>  {
> -	return sprintf(buf, "%d\n", get());
> +	return sysfs_emit(buf, "%d\n", get());
>  }
>  
>  #define EEEPC_SENSOR_SHOW_FUNC(_name, _get)				\
> 

Re: [PATCH] platform/x86: eeepc-laptop: use sysfs_emit() instead of sprintf()

[Hans de Goede]

Hi,

On 18-Oct-24 11:55 AM, chen zhang wrote:
> Follow the advice in Documentation/filesystems/sysfs.rst:
> show() should only use sysfs_emit() or sysfs_emit_at() when formatting
> the value to be returned to user space.
> 
> Signed-off-by: chen zhang <chenzhang@kylinos.cn>
> ---
>  drivers/platform/x86/eeepc-laptop.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
> index 03319a80e114..ba36b7bf6dc4 100644
> --- a/drivers/platform/x86/eeepc-laptop.c
> +++ b/drivers/platform/x86/eeepc-laptop.c

You need to add a:

#include <linux/sysfs.h>

when using sysfs_emit() .

Please send a v2 with this fixed and please don't forget to Cc:

platform-driver-x86@vger.kernel.org

for the v2.

Regards,

Hans





> @@ -285,7 +285,7 @@ static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
>  
>  	if (value < 0)
>  		return -EIO;
> -	return sprintf(buf, "%d\n", value);
> +	return sysfs_emit(buf, "%d\n", value);
>  }
>  
>  #define EEEPC_ACPI_SHOW_FUNC(_name, _cm)				\
> @@ -361,7 +361,7 @@ static ssize_t cpufv_show(struct device *dev,
>  
>  	if (get_cpufv(eeepc, &c))
>  		return -ENODEV;
> -	return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
> +	return sysfs_emit(buf, "%#x\n", (c.num << 8) | c.cur);
>  }
>  
>  static ssize_t cpufv_store(struct device *dev,
> @@ -393,7 +393,7 @@ static ssize_t cpufv_disabled_show(struct device *dev,
>  {
>  	struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
>  
> -	return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
> +	return sysfs_emit(buf, "%d\n", eeepc->cpufv_disabled);
>  }
>  
>  static ssize_t cpufv_disabled_store(struct device *dev,
> @@ -1025,7 +1025,7 @@ static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
>  
>  static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
>  {
> -	return sprintf(buf, "%d\n", get());
> +	return sysfs_emit(buf, "%d\n", get());
>  }
>  
>  #define EEEPC_SENSOR_SHOW_FUNC(_name, _get)				\