Re: [PATCH v2 18/20] tty: n_gsm: clean up implicit CR bit encoding in address field

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Apr 19, 2022 at 01:19:30AM -0700, D. Starke wrote:
> From: Daniel Starke <daniel.starke@siemens.com>
> 
> n_gsm is based on the 3GPP 07.010 and its newer version is the 3GPP 27.010.
> See https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=1516
> The changes from 07.010 to 27.010 are non-functional. Therefore, I refer to
> the newer 27.010 here. Chapter 5.2.1.2 describes the encoding of the
> address field within the frame header. It is made up of the DLCI address,
> command/response (CR) bit and EA bit.
> Use the predefined CR value instead of a plain 2 in alignment to the
> remaining code and to make the encoding obvious.
> 
> Signed-off-by: Daniel Starke <daniel.starke@siemens.com>
> ---
>  drivers/tty/n_gsm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
> index 9bf5aa508f0e..1beb4b28cd18 100644
> --- a/drivers/tty/n_gsm.c
> +++ b/drivers/tty/n_gsm.c
> @@ -751,7 +751,7 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg)
>  
>  	*--dp = msg->ctrl;
>  	if (gsm->initiator)
> -		*--dp = (msg->addr << 2) | 2 | EA;
> +		*--dp = (msg->addr << 2) | CR | EA;
>  	else
>  		*--dp = (msg->addr << 2) | EA;
>  	*fcs = gsm_fcs_add_block(INIT_FCS, dp , msg->data - dp);
> -- 
> 2.25.1
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
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created.  Hopefully you will not take offence and will fix the problem
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