linux-kernel - Re: Is anyone maintaining (or even using) usbtmc?

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Message-Id: <200908041732.40215.jbe@pengutronix.de>
Date:	Tue, 4 Aug 2009 17:32:40 +0200
From:	Juergen Beisert <jbe@...gutronix.de>
To:	linux-kernel@...r.kernel.org
Subject: Re: Is anyone maintaining (or even using) usbtmc?

On Dienstag, 4. August 2009, Andrew Lutomirski wrote:
> On Mon, Aug 3, 2009 at 6:01 PM, Andrew Lutomirski<luto@....edu> wrote:
> > On Mon, Aug 3, 2009 at 5:49 PM, Andrew Lutomirski<luto@....edu> wrote:
> >> On Mon, Aug 3, 2009 at 5:20 PM, Greg KH<greg@...ah.com> wrote:
> >>> On Mon, Aug 03, 2009 at 05:14:56PM -0400, Andrew Lutomirski wrote:
> >>>> Hi all-
> >>>>
> >>>> I'm trying to use usbtmc on an Aglient N9310A (The only TMC device I
> >>>> have), and it sort of works, but it seems to be both extremely buggy
> >>>> and missing a good deal of rather important functionality.  Is there
> >>>> anyone maintaining it?
> >>>
> >>> Yes, me.
> >>>
> >>>> If the answer is yes, I can describe the bugs (logspam, spurious
> >>>> errors, delayed messages, inability to read status, etc.) in greater
> >>>> detail.
> >>>
> >>> Please do, but also please use the latest version, in 2.6.30.3, we
> >>> fixed some bad problems in it recently.
> >>
> >> I am.
> >>
> >> Almost anything I do triggers this:
> >>
> >> usbtmc 3-1:1.0: Unable to read data, error -110
>
> My N9310A is now totally wedged.  Anything I can think of doing (send
> queries, send *RST, or any of the CLEAR ioctls) fails and spews stuff
> like this:
>
> [360946.881771] usbtmc 3-1:1.0: Unable to send data, error -110
> [360946.890770] usbtmc 3-1:1.0: usb_bulk_msg returned -110
> [360965.303400] usb 3-1: usb_control_msg returned -110
> [360965.312404] usb 3-1: usb_control_msg returned -110
> [361052.364626] usbtmc 3-1:1.0: usb_bulk_msg returned -110
> [361055.114579] usbtmc 3-1:1.0: Unable to send data, error -110
> [361055.123574] usbtmc 3-1:1.0: usb_bulk_msg returned -110
>
> I'm going to leave it like this in case you want me to try something.

Could I help also with tests? I have a Tektronix TDS 1001B here with TMC 
capability.

Juergen

-- 
Pengutronix e.K.                              | Juergen Beisert             |
Linux Solutions for Science and Industry      | Phone: +49-8766-939 228     |
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