[1/4] tty: rfcomm: use sysfs_emit() instead of sprintf()

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: zhangheng <zhangheng@kylinos.cn>
---
 net/bluetooth/rfcomm/tty.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Dear zhangheng,


Thank you for your patch.

Am 09.11.24 um 10:17 schrieb zhangheng:
> 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: zhangheng <zhangheng@kylinos.cn>

Currently your username is used. Could it be Zhang Heng?

     $ git config --global user.name "Zhang Heng"
     $ git commit --amend --author="Zhang Heng <zhangheng@kylinos.cn>"

> ---
>   net/bluetooth/rfcomm/tty.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
> index af80d599c337..21a5b5535ebc 100644
> --- a/net/bluetooth/rfcomm/tty.c
> +++ b/net/bluetooth/rfcomm/tty.c
> @@ -201,14 +201,14 @@ static ssize_t address_show(struct device *tty_dev,
>   			    struct device_attribute *attr, char *buf)
>   {
>   	struct rfcomm_dev *dev = dev_get_drvdata(tty_dev);
> -	return sprintf(buf, "%pMR\n", &dev->dst);
> +	return sysfs_emit(buf, "%pMR\n", &dev->dst);
>   }
>   
>   static ssize_t channel_show(struct device *tty_dev,
>   			    struct device_attribute *attr, char *buf)
>   {
>   	struct rfcomm_dev *dev = dev_get_drvdata(tty_dev);
> -	return sprintf(buf, "%d\n", dev->channel);
> +	return sysfs_emit(buf, "%d\n", dev->channel);
>   }
>   
>   static DEVICE_ATTR_RO(address);

With the nit above addressed:

Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>


Kind regards,

Paul

Hi, Heng,

Thanks for your patch.

zhangheng <zhangheng@kylinos.cn> writes:

> 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.

Please provide a cover letter [0/4] for your series, and send your
series with `git send-email '[0/4]' '[1/4]' ... '[4/4]', so that it will
be shown as a thread in most email clients, like shown in lore,

https://lore.kernel.org/linux-mm/20241107101005.69121-1-21cnbao@gmail.com/

While your email are shown as separate emails,

https://lore.kernel.org/lkml/20241109091748.4037589-1-zhangheng@kylinos.cn/

If there are no direct relationship among 4 patches in series, you can
send them separately instead of a series.

> Signed-off-by: zhangheng <zhangheng@kylinos.cn>
> ---
>  net/bluetooth/rfcomm/tty.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c
> index af80d599c337..21a5b5535ebc 100644
> --- a/net/bluetooth/rfcomm/tty.c
> +++ b/net/bluetooth/rfcomm/tty.c
> @@ -201,14 +201,14 @@ static ssize_t address_show(struct device *tty_dev,
>  			    struct device_attribute *attr, char *buf)
>  {
>  	struct rfcomm_dev *dev = dev_get_drvdata(tty_dev);
> -	return sprintf(buf, "%pMR\n", &dev->dst);
> +	return sysfs_emit(buf, "%pMR\n", &dev->dst);
>  }
>  
>  static ssize_t channel_show(struct device *tty_dev,
>  			    struct device_attribute *attr, char *buf)
>  {
>  	struct rfcomm_dev *dev = dev_get_drvdata(tty_dev);
> -	return sprintf(buf, "%d\n", dev->channel);
> +	return sysfs_emit(buf, "%d\n", dev->channel);
>  }
>  
>  static DEVICE_ATTR_RO(address);

--
Best Regards,
Huang, Ying