Re: [PATCH] ARM: hw_breakpoint: Enable debug powerdown only ifsystem supports 'has_ossr'

From: Will Deacon
Date: Tue Mar 19 2013 - 06:28:29 EST

On Tue, Mar 19, 2013 at 06:39:38AM +0000, Santosh Shilimkar wrote:
> On Monday 18 March 2013 10:36 PM, Will Deacon wrote:
> > Any chance you could follow up with your firmware/hardware guys about this
> > please? I'd really like to understand how we end up in this state in case we
> > can do something in the architecture to stop it from happening in future.
> >
> I will check on this part and update you when I hear from them.

Ok, thanks.

Dietmar -- I seem to remember that you thought GDB did actually work with
hardware breakpoints on Pandaboard across low-power states. Can you
confirm/deny this please?

> > Well, we could just add the warn_once prints but that doesn't stop debug
> > from breaking after the first pm/suspend/hotplug operation.
> >
> Probably we should drop the $subject patch approach and use warn_once
> at least for current rc. Ofcourse it doesn't help to get working
> hw_breakpoint support. Patch end of the email with warn_once.

Yeah, I'll merge that, but it's a real shame that this breaks hardware debug
on one of the few platforms where it was reported to work.

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