Re: kernel lockup due to bad baud rate data

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On Wed, 15 Jun 2011 17:21:30 -0700
Greg KH <greg@xxxxxxxxx> wrote:

> On Thu, Jun 16, 2011 at 12:09:12AM +0000, johnlinn@xxxxxxxxxxx wrote:
> > I'm testing with 2.6.39 and our serial driver that's unique to our ARM
> > platform.  I suspect we have a problem with our serial driver but
> > wanted to see if anyone has seen any similar behavior.
> > 
> > When running with 2 serial ports, any input from a serial terminal
> > running at the wrong baud rate (9600 instead of 115.2K) on a 2nd shell
> > (not the console shell) causes the kernel to lock up. It doesn't
> > crash, I'm still trying to understand what it's doing.  I can no
> > longer ping the board as the network was working prior.
> > 
> > I just wanted to make sure there's not any known tty issues related to
> > this.
> 
> There are some odd issues with stuff in this area, care to try 3.0-rc3
> and see if the problem is there as well or not?

If its driver specific as this seems I'd take a guess on the driver for
the hardware not properly handling framing errors or break so you get an
irq storm or some other failure from the framing error.
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