Nouveau - Mar 2023 - [PATCH RESEND] drm/nouveau/hwmon: Use sysfs_emit in show function callsbacks

According to Documentation/filesystems/sysfs.rst, the show() callback
function of kobject attributes should strictly use sysfs_emit() instead
of sprintf() family functions. So, make this change.
Issue identified using the coccinelle device_attr_show.cocci script.

Signed-off-by: Deepak R Varma <drv at mailo.com>
---
Note:
   Resending the patch for review and feedback. No functional changes.


 drivers/gpu/drm/nouveau/nouveau_hwmon.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
index a7db7c31064b..e844be49e11e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
@@ -41,7 +41,7 @@ static ssize_t
 nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
 					 struct device_attribute *a, char *buf)
 {
-	return snprintf(buf, PAGE_SIZE, "%d\n", 100);
+	return sysfs_emit(buf, "%d\n", 100);
 }
 static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, 0444,
 			  nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0);
@@ -54,8 +54,8 @@ nouveau_hwmon_temp1_auto_point1_temp(struct device *d,
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-	      therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000);
+	return sysfs_emit(buf, "%d\n",
+			  therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000);
 }
 static ssize_t
 nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
@@ -87,8 +87,8 @@ nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device *d,
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
 
-	return snprintf(buf, PAGE_SIZE, "%d\n",
-	 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000);
+	return sysfs_emit(buf, "%d\n",
+			  therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000);
 }
 static ssize_t
 nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
-- 
2.34.1

Reviewed-by: Lyude Paul <lyude at redhat.com>

Will push upstream in a moment

On Thu, 2023-03-02 at 01:05 +0530, Deepak R Varma wrote:
> According to Documentation/filesystems/sysfs.rst, the show() callback
> function of kobject attributes should strictly use sysfs_emit() instead
> of sprintf() family functions. So, make this change.
> Issue identified using the coccinelle device_attr_show.cocci script.
> 
> Signed-off-by: Deepak R Varma <drv at mailo.com>
> ---
> Note:
>    Resending the patch for review and feedback. No functional changes.
> 
> 
>  drivers/gpu/drm/nouveau/nouveau_hwmon.c | 10 +++++-----
>  1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
> index a7db7c31064b..e844be49e11e 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c
> @@ -41,7 +41,7 @@ static ssize_t
>  nouveau_hwmon_show_temp1_auto_point1_pwm(struct device *d,
>  					 struct device_attribute *a, char *buf)
>  {
> -	return snprintf(buf, PAGE_SIZE, "%d\n", 100);
> +	return sysfs_emit(buf, "%d\n", 100);
>  }
>  static SENSOR_DEVICE_ATTR(temp1_auto_point1_pwm, 0444,
>  			  nouveau_hwmon_show_temp1_auto_point1_pwm, NULL, 0);
> @@ -54,8 +54,8 @@ nouveau_hwmon_temp1_auto_point1_temp(struct device *d,
>  	struct nouveau_drm *drm = nouveau_drm(dev);
>  	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
>  
> -	return snprintf(buf, PAGE_SIZE, "%d\n",
> -	      therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000);
> +	return sysfs_emit(buf, "%d\n",
> +			  therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST) * 1000);
>  }
>  static ssize_t
>  nouveau_hwmon_set_temp1_auto_point1_temp(struct device *d,
> @@ -87,8 +87,8 @@ nouveau_hwmon_temp1_auto_point1_temp_hyst(struct device
*d,
>  	struct nouveau_drm *drm = nouveau_drm(dev);
>  	struct nvkm_therm *therm = nvxx_therm(&drm->client.device);
>  
> -	return snprintf(buf, PAGE_SIZE, "%d\n",
> -	 therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) * 1000);
> +	return sysfs_emit(buf, "%d\n",
> +			  therm->attr_get(therm, NVKM_THERM_ATTR_THRS_FAN_BOOST_HYST) *
1000);
>  }
>  static ssize_t
>  nouveau_hwmon_set_temp1_auto_point1_temp_hyst(struct device *d,
-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat