AnyDATA ADU-500A USB-modem and a lot of "ubsa_cfg_request" errors

[Hans Petter Selasky]

On Friday 06 November 2009 08:31:05 Alexey Markov wrote:
> Hello, Hans!
> On November, 05 2009 at 15:59 you wrote to freebsd-usb at freebsd.org:
>
>  ??>> except that I got a lot of such messages on console when I run ppp:
>  ??>>
>  ??>> ubsa_cfg_request:371: device request failed, err=USB_ERROR_STALLED
>  ??>>
>  ??>> I really want to work it out, and I have some spare time for
>  ??>> experiments, but haven't any experience of debuging kernel drivers.
>  ??>> Can anybody give me a clue to solve this little problem?
>
>  HPS> Did you look in the source code:
>  HPS> /sys/dev/usb/serial/ubsa.c
>
> Yes, of course! Line #317 belongs to ubsa_cfg_request(), which just calls
> another function, ucom_cfg_do_request(), with some parameters. But this
> function is called several times in the code, so I've changed code of
> ubsa_cfg_request() function to see, which config requests are failed:
>
> DPRINTFN(0, "device request failed, err=%s, index=%d, value=%d "...
>
> I have got a lot of messages like this one:
>
> ubsa_cfg_request:371: device request failed, err=USB_ERROR_STALLED,
> index=10, value=1 (ignored)
>
> where index/value pairs sequence is:
>
> 10/1, 11/1, 12/0, 0/24, 3/0, 2/3, 1/0, 16/384, 0/2, 3/0 and so forth.
>
> It seems, that driver tried to set some config parameters like DTR, RTS,
> BAUDRATE etc, and failed. But after all, modem is working (maybe, with
> non-optimal settings or default settings).
>
> So, I need an advice: what can I do to find the cause of failed config
> requests?

Hi,

Maybe you device belongs in the ugensa.c driver and not ubsa.c if it does not 
support all those DTR/RTS ... settings? Do you have a datasheet for the modem 
in question?

--HPS