linux-kernel - Re: [PATCH 1/2] tty: n_gsm: Fix long delays with control frame timeouts in ADM mode

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Date:   Thu, 12 Apr 2018 23:24:12 +0200
From:   Pavel Machek <pavel@....cz>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        Alan Cox <alan@...yncelyn.cymru>,
        Dan Williams <dcbw@...hat.com>,
        Jiri Prchal <jiri.prchal@...ignal.cz>,
        Jiri Slaby <jslaby@...e.cz>, Marcel Partap <mpartap@....net>,
        Merlijn Wajer <merlijn@...zup.org>,
        Michael Nazzareno Trimarchi <michael@...rulasolutions.com>,
        Michael Scott <michael.scott@...aro.org>,
        Peter Hurley <peter@...leysoftware.com>,
        Russ Gorby <russ.gorby@...el.com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Sebastian Reichel <sre@...nel.org>
Subject: Re: [PATCH 1/2] tty: n_gsm: Fix long delays with control frame
 timeouts in ADM mode

On Mon 2018-04-09 06:42:59, Tony Lindgren wrote:
> * Pavel Machek <pavel@....cz> [180409 10:56]:
> > Ok, I should have all that enabled. But droid4-ngsm still fails:
> > 
> > user@...uan:/my/droid4-ngsm$ sudo ./droid4-ngsm
> > Starting ngsm..
> > Testing ngsm..
> > Could not open /dev/gsmtty1: Level 2 halted
> > Trying to start ngsm again: Level 2 halted
> > Starting ngsm..
> 
> I guess you must have phy-mapphone-mdm6600 enabled as you a have
> working modem over USB. What do you see in dmesg if you enable n_gsm
> debug with modprobe n_gsm debug=0xff or on kernel cmdline?

Ok, let me try... Got some debugging output, hopefully you can see
what is going on there?

Thanks,
							Pavel

sudo insmod /tmp/n_gsm.ko debug=0xff

user@...uan:/my/droid4-ngsm$ sudo ./droid4-ngsm
Starting ngsm..
Testing ngsm..
Could not open /dev/gsmtty1: Level 2 halted
Trying to start ngsm again: Level 2 halted
Starting ngsm..
Testing ngsm..
Could not open /dev/gsmtty1: Level 2 halted
Trying to start ngsm again: Level 2 halted
Starting ngsm..
^CCould not set conf: Interrupted system call
Could not start ngsm: Interrupted system call

[ 3378.381134] cpcap-usb-phy cpcap-usb-phy.0: connected to USB host
[ 3408.460937] cpcap-usb-phy cpcap-usb-phy.0: connected to USB host
[ 3413.633239] Q>  0) R: UIH(F)
[ 3413.639190] C3
[ 3413.642761] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3413.653564] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3413.978942] Q>  0) R: UIH(F)
[ 3413.984924] C3
[ 3413.988586] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3413.999114] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3414.328247] Q>  0) R: UIH(F)
[ 3414.333068] C3
[ 3414.336608] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3414.346984] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3414.679870] gsmld_output: 00000000: f9 03 3f 01 1c f9
..?...
[ 3414.690979] --> 0) C: SABM(P)
[ 3414.798370] gsmld_output: 00000000: f9 03 3f 01 1c f9
..?...
[ 3414.809570] --> 0) C: SABM(P)
[ 3414.918243] gsmld_output: 00000000: f9 03 3f 01 1c f9
..?...
[ 3414.928588] --> 0) C: SABM(P)
[ 3416.743682] Q>  0) R: UIH(F)
[ 3416.748352] C3
[ 3416.751800] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3416.762145] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3417.088256] Q>  0) R: UIH(F)
[ 3417.093078] C3
[ 3417.096679] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3417.107208] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3417.438201] Q>  0) R: UIH(F)
[ 3417.443206] C3
[ 3417.446990] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3417.457733] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3417.788330] gsmld_output: 00000000: f9 03 3f 01 1c f9
..?...
[ 3417.799163] --> 0) C: SABM(P)
[ 3417.918243] gsmld_output: 00000000: f9 03 3f 01 1c f9
..?...
[ 3417.929107] --> 0) C: SABM(P)
[ 3418.038208] gsmld_output: 00000000: f9 03 3f 01 1c f9
..?...
[ 3418.049102] --> 0) C: SABM(P)
[ 3419.854248] Q>  0) R: UIH(F)
[ 3419.859527] C3
[ 3419.863555] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3419.874481] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3420.208221] Q>  0) R: UIH(F)
[ 3420.213500] C3
[ 3420.217498] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3420.228393] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3420.598205] Q>  0) R: UIH(F)
[ 3420.603515] C3
[ 3420.607513] gsm_data_kick: 00000000: 7e 01 ef c3 aa 7e
~....~
[ 3420.618377] gsmld_output: 00000000: 7e 01 ef c3 aa 7e
~....~
user@...uan:/my/droid4-ngsm$

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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