linux-kernel - Re: [PATCH v3 1/2] vsprintf: Add %p[mM]U for uppercase MAC address

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Date:   Thu, 27 Apr 2023 14:26:00 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Konrad Gräfe <k.graefe@...eware.de>
Cc:     Quentin Schulz <quentin.schulz@...obroma-systems.com>,
        Petr Mladek <pmladek@...e.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Andrzej Pietrasiewicz <andrzej.p@...labora.com>,
        Felipe Balbi <balbi@...com>, stable@...r.kernel.org
Subject: Re: [PATCH v3 1/2] vsprintf: Add %p[mM]U for uppercase MAC address

On Thu, Apr 27, 2023 at 01:51:19PM +0200, Konrad Gräfe wrote:
> The CDC-ECM specification requires an USB gadget to send the host MAC
> address as uppercase hex string. This change adds the appropriate
> modifier.
> 
> Cc: stable@...r.kernel.org
> Signed-off-by: Konrad Gräfe <k.graefe@...eware.de>
> ---
> Added in v3
> 
>  lib/vsprintf.c | 18 +++++++++++++++---
>  1 file changed, 15 insertions(+), 3 deletions(-)
> 
> diff --git a/lib/vsprintf.c b/lib/vsprintf.c
> index be71a03c936a..8aee1caabd9e 100644
> --- a/lib/vsprintf.c
> +++ b/lib/vsprintf.c
> @@ -1269,9 +1269,10 @@ char *mac_address_string(char *buf, char *end, u8 *addr,
>  {
>  	char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")];
>  	char *p = mac_addr;
> -	int i;
> +	int i, pos;
>  	char separator;
>  	bool reversed = false;
> +	bool uppercase = false;
>  
>  	if (check_pointer(&buf, end, addr, spec))
>  		return buf;
> @@ -1281,6 +1282,10 @@ char *mac_address_string(char *buf, char *end, u8 *addr,
>  		separator = '-';
>  		break;
>  
> +	case 'U':
> +		uppercase = true;
> +		break;

No documentation update as well?

thanks,

greg k-h