linux-kernel - Re: [PATCH PREEMPT_RT]: On AT91 ARM: GPIO Interrupt handling can/will stall forever

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Message-Id: <1196177122.23808.7.camel@imap.mvista.com>
Date:	Tue, 27 Nov 2007 07:25:21 -0800
From:	Daniel Walker <dwalker@...sta.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	ARM Linux Mailing List 
	<linux-arm-kernel@...ts.arm.linux.org.uk>,
	RT <linux-rt-users@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Remy Bohmer <linux@...mer.net>
Subject: Re: [PATCH PREEMPT_RT]: On AT91 ARM: GPIO Interrupt handling
	can/will stall forever

On Tue, 2007-11-27 at 10:11 -0500, Steven Rostedt wrote:
> Thomas,
> 
> Can you ACK or NACK this patch.  I know you play with a bunch of
> hardware that this patch may affect.
> 

My two cents, I think it's needed (or something like it).. It looks like
handle_simple_irq normally expects a custom cascade type handler to
unmask on return. When you switch to a threaded handler the cascade
handler is gone and can't unmask..

Daniel

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