linux-kernel - Re: [PATCH] staging: greybus: gbphy: replaced sprintf() with sysfs

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Message-ID: <2026020423-handwash-employed-2176@gregkh>
Date: Wed, 4 Feb 2026 10:57:58 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Neel Bullywon <neelb2403@...il.com>
Cc: Johan Hovold <johan@...nel.org>, Alex Elder <elder@...nel.org>,
	greybus-dev@...ts.linaro.org, linux-staging@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: greybus: gbphy: replaced sprintf() with
 sysfs_emit()

On Tue, Feb 03, 2026 at 04:22:54PM -0500, Neel Bullywon wrote:
> Replaced sprintf() with sysfs_emit in the protocol_id_show() sysfs
> attribute func to prevent any potential buffer overflows
> 
> This is to ensure a kernel-wide migration to safer string formatting
> functions for sysfs handlers
> 
> This was compile-tested only (no VM/hardware used)
> 
> Signed-off-by: Neel Bullywon <neelb2403@...il.com>
> ---
>  drivers/staging/greybus/gbphy.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/greybus/gbphy.c b/drivers/staging/greybus/gbphy.c
> index 60cf09a302a7..55f132b09cee 100644
> --- a/drivers/staging/greybus/gbphy.c
> +++ b/drivers/staging/greybus/gbphy.c
> @@ -31,7 +31,7 @@ static ssize_t protocol_id_show(struct device *dev,
>  {
>  	struct gbphy_device *gbphy_dev = to_gbphy_dev(dev);
>  
> -	return sprintf(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id);
> +	return sysfs_emit(buf, "0x%02x\n", gbphy_dev->cport_desc->protocol_id);

As Dan said, this really isn't a needed change.  sysfs_emit() is great
for new sysfs files, but for existing ones, sprintf() is just fine.

thanks,

greg k-h