On Mon, Mar 06, 2000 at 06:50:42PM +0100, Jamie Lokier wrote:
> Vojtech Pavlik wrote:
> > Well, the USB ACM driver does just tty_flip_buffer_push() from an
> > interrupt, which I think is normal even for other drivers? Well, if not,
> > I can change it ...
>
> serial.c does that.
>
> > Hmm, it also calls a tty->ldisc.write_wakeup from an interrupt. Might
> > this be the cause?
>
> Yes that's what I was thinking. ppp_async.c does some complicated
> looking stuff in write_wakeup... including a kfree_skb(). That would
> explain the message. That could just be changed to kfree_skb_any().
>
> I really don't know if the rest of ppp_async_wakeup is irq safe, but it
> does like it _might_ be.
Ok, could you check if this patch to acm.c fixes the problem for you?
-- Vojtech Pavlik SuSE Labs
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