linux-kernel - Re: [PATCH] warn about shared irqs requesting IRQF_DISABLED registered with setup

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Message-ID: <20091130092849.GA6896@pengutronix.de>
Date:	Mon, 30 Nov 2009 10:28:49 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Jamie Lokier <jamie@...reable.org>
Cc:	David Brownell <dbrownell@...rs.sourceforge.net>,
	Eric Miao <eric.y.miao@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	John Stultz <johnstul@...ibm.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Nicolas Pitre <nico@...vell.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] warn about shared irqs requesting IRQF_DISABLED
	registered with setup_irq

Hello Jamie,

On Sun, Nov 29, 2009 at 03:18:40PM +0000, Jamie Lokier wrote:
> According to this thread, at the moment when you have multiple
> IRQF_DISABLED|IRQF_SHARED ISRs, only the first one is run with
> interrupts disabled.
No.  When you have multiple IRQF_SHARED ISRs *all* are run with irqs
disabled if the first has IRQF_DISABLED.

Best regards
Uwe

-- 
Pengutronix e.K.                              | Uwe Kleine-König            |
Industrial Linux Solutions                    | http://www.pengutronix.de/  |
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