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

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Message-ID: <cb0375e10908031600v4db81c51hd98094ef9a0a5a16@mail.gmail.com>
Date:	Mon, 3 Aug 2009 19:00:47 -0400
From:	Andrew Lutomirski <luto@....edu>
To:	Greg KH <greg@...ah.com>
Cc:	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	gregkh@...e.de
Subject: Re: Is anyone maintaining (or even using) usbtmc?

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.

--Andy
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