[PATCH] drm/sysfs: Convert sysfs sprintf/snprintf family to sysfs_emit

[Daniel Vetter]

On Mon, Mar 22, 2021 at 09:19:38AM +0800, Tian Tao wrote:
> Fix the following coccicheck warning:
> drivers/gpu/drm/drm_sysfs.c:172:8-16: WARNING: use scnprintf or sprintf
> drivers/gpu/drm/drm_sysfs.c:185:8-16: WARNING: use scnprintf or sprintf
> drivers/gpu/drm/drm_sysfs.c:159:8-16: WARNING: use scnprintf or sprintf
> 
> Signed-off-by: Tian Tao <tiantao6 at hisilicon.com>

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> ---
>  drivers/gpu/drm/drm_sysfs.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c
> index f0336c8..968a956 100644
> --- a/drivers/gpu/drm/drm_sysfs.c
> +++ b/drivers/gpu/drm/drm_sysfs.c
> @@ -156,8 +156,8 @@ static ssize_t status_show(struct device *device,
>  
>  	status = READ_ONCE(connector->status);
>  
> -	return snprintf(buf, PAGE_SIZE, "%s\n",
> -			drm_get_connector_status_name(status));
> +	return sysfs_emit(buf, "%s\n",
> +			  drm_get_connector_status_name(status));
>  }
>  
>  static ssize_t dpms_show(struct device *device,
> @@ -169,8 +169,7 @@ static ssize_t dpms_show(struct device *device,
>  
>  	dpms = READ_ONCE(connector->dpms);
>  
> -	return snprintf(buf, PAGE_SIZE, "%s\n",
> -			drm_get_dpms_name(dpms));
> +	return sysfs_emit(buf, "%s\n", drm_get_dpms_name(dpms));
>  }
>  
>  static ssize_t enabled_show(struct device *device,
> @@ -182,7 +181,7 @@ static ssize_t enabled_show(struct device *device,
>  
>  	enabled = READ_ONCE(connector->encoder);
>  
> -	return snprintf(buf, PAGE_SIZE, enabled ? "enabled\n" : "disabled\n");
> +	return sysfs_emit(buf, enabled ? "enabled\n" : "disabled\n");
>  }
>  
>  static ssize_t edid_show(struct file *filp, struct kobject *kobj,
> -- 
> 2.7.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch