[PATCH v2] usb: core: sysfs: convert sysfs snprintf to sysfs_emit

[PATCH v2] usb: core: sysfs: convert sysfs snprintf to sysfs_emit

[Xuezhi Zhang]

Fix the following coccicheck warnings:
drivers/usb/core/sysfs.c:921:8-16:
WARNING: use scnprintf or sprintf
drivers/usb/core/sysfs.c:730:8-16:
WARNING: use scnprintf or sprintf

Signed-off-by: Xuezhi Zhang <zhangxuezhi1@coolpad.com>
---
v2: add correct public mailing list
---
 drivers/usb/core/sysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index fa2e49d432ff..6387c0dfe30e 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -727,7 +727,7 @@ static ssize_t authorized_show(struct device *dev,
 			       struct device_attribute *attr, char *buf)
 {
 	struct usb_device *usb_dev = to_usb_device(dev);
-	return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized);
+	return sysfs_emit(buf, "%u\n", usb_dev->authorized);
 }
 
 /*
@@ -918,7 +918,7 @@ static ssize_t authorized_default_show(struct device *dev,
 	struct usb_hcd *hcd;
 
 	hcd = bus_to_hcd(usb_bus);
-	return snprintf(buf, PAGE_SIZE, "%u\n", hcd->dev_policy);
+	return sysfs_emit(buf, "%u\n", hcd->dev_policy);
 }
 
 static ssize_t authorized_default_store(struct device *dev,
-- 
2.34.1

Re: [PATCH v2] usb: core: sysfs: convert sysfs snprintf to sysfs_emit

[Greg KH]

On Mon, Jun 13, 2022 at 10:35:53AM +0800, Xuezhi Zhang wrote:
> Fix the following coccicheck warnings:
> drivers/usb/core/sysfs.c:921:8-16:
> WARNING: use scnprintf or sprintf
> drivers/usb/core/sysfs.c:730:8-16:
> WARNING: use scnprintf or sprintf

Please do not wrap error or warning messages.

> 
> Signed-off-by: Xuezhi Zhang <zhangxuezhi1@coolpad.com>
> ---
> v2: add correct public mailing list
> ---
>  drivers/usb/core/sysfs.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
> index fa2e49d432ff..6387c0dfe30e 100644
> --- a/drivers/usb/core/sysfs.c
> +++ b/drivers/usb/core/sysfs.c
> @@ -727,7 +727,7 @@ static ssize_t authorized_show(struct device *dev,
>  			       struct device_attribute *attr, char *buf)
>  {
>  	struct usb_device *usb_dev = to_usb_device(dev);
> -	return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized);
> +	return sysfs_emit(buf, "%u\n", usb_dev->authorized);
>  }
>  
>  /*
> @@ -918,7 +918,7 @@ static ssize_t authorized_default_show(struct device *dev,
>  	struct usb_hcd *hcd;
>  
>  	hcd = bus_to_hcd(usb_bus);
> -	return snprintf(buf, PAGE_SIZE, "%u\n", hcd->dev_policy);
> +	return sysfs_emit(buf, "%u\n", hcd->dev_policy);
>  }

Any specific reason you are not fixing up all sysfs show entries in this
file?  Only doing a few feels odd and wrong, please do the whole file at
once.

thanks,

greg k-h