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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 9 Apr 2018 12:54:07 +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

Hi!

> > > > Do you have a tool to use and a script?
> > > 
> > > Yes I used the shell script I posted earlier, but forgot it also
> > > needs the ldattach done.
> > > 
> > > Anyways, last night and today I wrote a quick test utility called
> > > droid4-ngsm that initializes things and I can use to do some
> > > experiments to get the ts27010 channel proxying to W3GLTE also
> > > going:
> > > 
> > > http://github.com/tmlind/droid4-ngsm/
> > 
> > Ok, now i'm confused. It wants to bind to ttyS0, but modem is on
> > ttyUSB4 AFAICT? Or is the modem connected to serial port, too? (Do I
> > need to enable some more drivers for that?)
> > 
> > I do have ttyS0, but I don't think there's anything attached there. Or
> > is ttyS0 for the LTE modem?
> 
> The ttyS0 is connected to mdm6600, and ttyUSB4 seems to be
> some buggy subset of ttyS0 n_gsm dlci1. You need need at least
> the following commits in current mainline kernel:
> 
> 984c7706ff18 ("ARM: dts: omap4-droid4: Configure uart1 pins")
> e5b9fd7bdeb5 ("ARM: dts: omap4-droid4: Configure MDM6600 USB PHY")
> 
> And then you need PHY_MAPPHONE_MDM6600 and CONFIG_N_GSM enabled.

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..

commit 984c7706ff180e33096c57183435d925cb644576 says:

    ARM: dts: omap4-droid4: Configure uart1 pins

    These are needed to use the n_gsm driver for TS 27.010 UART
        multiplexing. Note that support for the OOB wake gpio is still
	    missing so the UART is not yet usable for n_gsm.

...am I still missing the OOB wake gpio support?

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

Download attachment "signature.asc" of type "application/pgp-signature" (182 bytes)