linux-kernel - Re: [PATCH v2 0/3] TTY improve n

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Date:   Mon, 18 May 2020 12:01:45 +0200
From:   Gregory CLEMENT <gregory.clement@...tlin.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>, linux-kernel@...r.kernel.org
Cc:     Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v2 0/3] TTY improve n_gsm support

Hello,

> Hello,
>
> This series is the second version of patch improving n_gms support
> especially with TELIT LE910. However the fix should benefit to any
> modem supporting cmux.

You can just ignore the emails from this point, I forgot to remove the
remaining .patch!

Sorry for the noise

Gregory

>
> The first patch is just about improving debugging output.
>
> The second one removes a tty optimization which make the LE910 hang.
>
> The last one fixes an issue observed on the LE910 but should benefit
> to all the modem. We observed that pretty quickly the transfer done
> using the virtual tty were blocked. We found that it was due of a
> wakeup to the real tty. Without this fix, the real tty wait for
> indefinitely.
>
> Thanks to Jiri Slaby for the review.
>
> Changelog:
>  v1 -> v2:
>  - don't replace the pr_info by pr_debug
>  - remove the superfluous printk("\n");
>  - use --follow option with git log to find the original commit to fix
>  - use tty_port_tty_wakeup
>  - use 'for' loop instead of 'while'
>
> Gregory
>
> Gregory CLEMENT (3):
>   tty: n_gsm: Improve debug output
>   tty: n_gsm: Fix SOF skipping
>   tty: n_gsm: Fix waking up upper tty layer when room available
>
>  drivers/tty/n_gsm.c | 48 +++++++++++++++++++++++----------------------
>  1 file changed, 25 insertions(+), 23 deletions(-)
>
> -- 
> 2.26.2
>

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com