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Re: PROBLEM: kernel oops with g_serial USB gadget on 2.6.30

by David Brownellon 2009-06-24T23:44:09+00:00
On Wednesday 24 June 2009, Marek Szyprowski wrote:
>
> > So it's looking like tty->driver_data is somehow NULL.  That's
> > never supposed to happen.  Did gs_open() fail or something?
>
> I've triggered this bug by running a 'getty -L 115200 ttyGS0 vt100' and trying
> to login on that usb console and then pressing 'enter' key for longer time.
> getty might abort after a few failed logins, so the /dev/ttyGS0 file might be
> closed before all characters that need to be echoed were processed (usb udc debug
> messages really slows it down). This is however a pure guessing, I know nothing
> about tty framework and internals.
Hmm, that would mean the shutdown processing isn't behaving
right. Plausible, it's tricky to test.
Patches accepted. ;)
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