From: David Brownell <david-b@pacbell.net>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: "'Alan Cox'" <alan@lxorguk.ukuu.org.uk>,
"'Alan Stern'" <stern@rowland.harvard.edu>,
"'Peter Korsgaard'" <jacmet@sunsite.dk>,
"'USB list'" <linux-usb@vger.kernel.org>,
"'Kernel development list'" <linux-kernel@vger.kernel.org>,
kyungmin.park@samsung.com
Subject: Re: PROBLEM: kernel oops with g_serial USB gadget on 2.6.30
Date: Wed, 24 Jun 2009 16:43:48 -0700 [thread overview]
Message-ID: <200906241643.48421.david-b@pacbell.net> (raw)
In-Reply-To: <003b01c9f4b6$c39002b0$4ab00810$%szyprowski@samsung.com>
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. ;)
prev parent reply other threads:[~2009-06-24 23:43 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-22 12:04 PROBLEM: kernel oops with g_serial USB gadget on 2.6.30 Marek Szyprowski
2009-06-22 12:33 ` Peter Korsgaard
2009-06-22 13:55 ` Marek Szyprowski
2009-06-22 14:06 ` Peter Korsgaard
2009-06-22 14:06 ` Alan Stern
2009-06-22 14:12 ` Marek Szyprowski
2009-06-22 15:02 ` Alan Stern
2009-06-23 3:26 ` David Brownell
2009-06-23 6:41 ` Marek Szyprowski
2009-06-23 7:22 ` David Brownell
2009-06-23 8:37 ` Marek Szyprowski
2009-06-23 9:21 ` Alan Cox
2009-06-23 9:33 ` Marek Szyprowski
2009-06-23 9:54 ` Alan Cox
2009-06-23 15:00 ` Marek Szyprowski
2009-06-23 16:47 ` David Brownell
2009-06-23 16:52 ` David Brownell
2009-06-24 7:07 ` Marek Szyprowski
2009-06-24 8:42 ` Alan Cox
2009-06-24 8:54 ` David Brownell
2009-06-24 8:49 ` David Brownell
2009-06-24 10:30 ` Marek Szyprowski
2009-06-24 23:43 ` David Brownell [this message]
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