On Wed, Feb 26, 2014 at 05:01:10PM +0100, Johan Hovold wrote:
> On Tue, Feb 25, 2014 at 03:55:07PM +0000, Ludovic wrote:
> > At 1st the driver detected the USB key and set-up the serial ports. But when
> > trying to write I got a kernel panic on the router.
>
> Are you able to get a stack trace?
>
> > I finally found that it seems to work properly with 'debug=0', and I also
> > added the patch below.
>
> Hmm. The patch below is not correct, though (more below).
>
> I assume you're still using an old kernel as the debug module parameter
> doesn't exist anymore. Can you reproduce this on a recent kernel?
>
> > So I need:
> > 1- to find what cause the panic on my router with debug=1
> > 2- to test the patch on a LE system.
> >
> > Thanks for you time,
>
> You're welcome.
>
> > Ludovic.
> >
> > --- io_ti.c.ok2002 2014-02-24 21:54:46.000000000 +0100
> > +++ io_ti.c 2014-02-24 21:56:33.000000000 +0100
> > @@ -2408,8 +2408,8 @@
> > dbg("bUartMode: %d", config->bUartMode);
> >
> > /* move the word values into big endian mode */
> > - cpu_to_be16s(&config->wFlags);
> > - cpu_to_be16s(&config->wBaudRate);
> > + swab16s(&config->wFlags);
> > + swab16s(&config->wBaudRate);
>
> This isn't right. The config buffer is transferred as data and only
> needs to be byte-swapped on LE-systems (i.e. cpu_to_be16s is correct).
>
> Could you verify that my patch works without those two additional
> changes (with debug=0)?
>
> > status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
> > (__u8)(UMPM_UART1_PORT + port_number),
Did you get a chance to verify my (unmodified) patch (on BE and LE)? Are you
able to test it against a recent kernel on your router or are you stuck
with an old kernel?
Thanks,
Johan
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