linux-kernel - Re: [PATCH v5 01/10] tty: n_gsm: add restart flag to DLC specific ioctl config

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Date:   Tue, 30 May 2023 12:21:28 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     "D. Starke" <daniel.starke@...mens.com>
Cc:     linux-serial@...r.kernel.org, jirislaby@...nel.org,
        ilpo.jarvinen@...ux.intel.com, felix-haase@...mens.com,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 01/10] tty: n_gsm: add restart flag to DLC specific
 ioctl config

On Wed, May 17, 2023 at 05:56:55PM +0200, D. Starke wrote:
> From: Daniel Starke <daniel.starke@...mens.com>
> 
> Currently, changing the parameters of a DLCI gives no direct control to the
> user whether this should trigger a channel reset or not. The decision is
> solely made by the driver based on the assumption which parameter changes
> are compatible or not. Therefore, the user has no means to perform an
> automatic channel reset after parameter configuration for non-conflicting
> changes.
> 
> Add the parameter 'flags' to 'gsm_dlci_config' to force a channel reset
> after ioctl setting regardless of whether the changes made require this or
> not by setting this to 'GSM_FL_RESTART'.
> 
> Note that 'GSM_FL_RESTART' is currently the only allow flag to allow
> additions here.
> 
> Signed-off-by: Daniel Starke <daniel.starke@...mens.com>
> ---
>  drivers/tty/n_gsm.c         |  4 ++++
>  include/uapi/linux/gsmmux.h | 15 ++++++++++++++-
>  2 files changed, 18 insertions(+), 1 deletion(-)
> 
> v4 -> v5:
> Changed GSM_FL_RESTART comment to be more specific about its use as
> suggested in the review comment.
> 
> Please note that I cannot response to emails until August 7th. Felix Haase
> will take over from our side for questions regarding this patch series or
> the n_gsm.
> 
> Link: https://lore.kernel.org/all/DB9PR10MB5881B63FBBA7912DF5A7A6A8E0789@DB9PR10MB5881.EURPRD10.PROD.OUTLOOK.COM/

Ok, I'll wait for a resend by Felix to consider these as having someone
be responsible for them if they cause problems is key :)

thanks,

greg k-h