staging: fbtft: change snprintf() to scnprintf()
diff mbox series

Message ID 20210402090501.152561-1-zhangxuezhi3@gmail.com
State New, archived
Headers show
Series
  • staging: fbtft: change snprintf() to scnprintf()
Related show

Commit Message

Carlis April 2, 2021, 9:05 a.m. UTC
From: Xuezhi Zhang <zhangxuezhi1@yulong.com>

show() must not use snprintf() when formatting the value to
be returned to user space.

Signed-off-by: Xuezhi Zhang <zhangxuezhi1@yulong.com>
---
 drivers/staging/fbtft/fbtft-sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Greg KH April 2, 2021, 9:17 a.m. UTC | #1
On Fri, Apr 02, 2021 at 09:05:01AM +0000, Carlis wrote:
> From: Xuezhi Zhang <zhangxuezhi1@yulong.com>
> 
> show() must not use snprintf() when formatting the value to
> be returned to user space.

Why not?  The code is just fine as-is.

> 
> Signed-off-by: Xuezhi Zhang <zhangxuezhi1@yulong.com>
> ---
>  drivers/staging/fbtft/fbtft-sysfs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/fbtft/fbtft-sysfs.c b/drivers/staging/fbtft/fbtft-sysfs.c
> index 26e52cc2de64..7df92db648d6 100644
> --- a/drivers/staging/fbtft/fbtft-sysfs.c
> +++ b/drivers/staging/fbtft/fbtft-sysfs.c
> @@ -199,7 +199,7 @@ static ssize_t show_debug(struct device *device,
>  	struct fb_info *fb_info = dev_get_drvdata(device);
>  	struct fbtft_par *par = fb_info->par;
>  
> -	return snprintf(buf, PAGE_SIZE, "%lu\n", par->debug);
> +	return scnprintf(buf, PAGE_SIZE, "%lu\n", par->debug);

If you really want to "fix" this, please just use sysfs_emit().  This
change as-is, does nothing.

thanks,

greg k-h

Patch
diff mbox series

diff --git a/drivers/staging/fbtft/fbtft-sysfs.c b/drivers/staging/fbtft/fbtft-sysfs.c
index 26e52cc2de64..7df92db648d6 100644
--- a/drivers/staging/fbtft/fbtft-sysfs.c
+++ b/drivers/staging/fbtft/fbtft-sysfs.c
@@ -199,7 +199,7 @@  static ssize_t show_debug(struct device *device,
 	struct fb_info *fb_info = dev_get_drvdata(device);
 	struct fbtft_par *par = fb_info->par;
 
-	return snprintf(buf, PAGE_SIZE, "%lu\n", par->debug);
+	return scnprintf(buf, PAGE_SIZE, "%lu\n", par->debug);
 }
 
 static struct device_attribute debug_device_attr =