linux-kernel - Re: [PATCH 3/9] tty: n_gsm: add missing description to gsm

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Date:   Wed, 5 Apr 2023 11:18:47 +0300 (EEST)
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     "D. Starke" <daniel.starke@...mens.com>
cc:     linux-serial <linux-serial@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/9] tty: n_gsm: add missing description to gsm_config

On Wed, 5 Apr 2023, D. Starke wrote:

> From: Daniel Starke <daniel.starke@...mens.com>
> 
> Currently, all available structure fields in gsmmux.h except those
> for gsm_config are commented.
> 
> Fix this by adding appropriate comments to the not commented fields.
> 
> Signed-off-by: Daniel Starke <daniel.starke@...mens.com>
> ---
>  include/uapi/linux/gsmmux.h | 22 +++++++++++-----------
>  1 file changed, 11 insertions(+), 11 deletions(-)
> 
> diff --git a/include/uapi/linux/gsmmux.h b/include/uapi/linux/gsmmux.h
> index 33ee7b857c52..422a52e184b3 100644
> --- a/include/uapi/linux/gsmmux.h
> +++ b/include/uapi/linux/gsmmux.h
> @@ -8,17 +8,17 @@
>  
>  struct gsm_config
>  {
> -	unsigned int adaption;
> -	unsigned int encapsulation;
> -	unsigned int initiator;
> -	unsigned int t1;
> -	unsigned int t2;
> -	unsigned int t3;
> -	unsigned int n2;
> -	unsigned int mru;
> -	unsigned int mtu;
> -	unsigned int k;
> -	unsigned int i;
> +	unsigned int adaption;	/* Convergence layer type */
> +	unsigned int encapsulation; /* Framing (0 = basic option, 1 = advanced option) */
> +	unsigned int initiator;	/* Initiator or responder */
> +	unsigned int t1;	/* Acknowledgment timer */
> +	unsigned int t2;	/* Response timer for multiplexer control channel */
> +	unsigned int t3;	/* Response timer for wake-up procedure */
> +	unsigned int n2;	/* Maximum number of retransmissions */
> +	unsigned int mru;	/* Maximum incoming frame payload size */
> +	unsigned int mtu;	/* Maximum outgoing frame payload size */

I'm used to "payload" referring in networking context to "useful" part of 
the frame but MTU/MRU probably includes headers too? Maybe just say "frame 
size"?

> +	unsigned int k;		/* Window size */
> +	unsigned int i;		/* Frame type (1 = UIH, 2 = UI) */
>  	unsigned int unused[8];	/* Can not be used */
>  };
>  
> 

-- 
 i.