linux-kernel - Re: [PATCH 1/3] ARM: omap2+: set IRQCHIP_SKIP_SET

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Message-ID: <CAMQu2gyfE6otEmWhJ7pkNYPjb8iUY21dzL6a3-qAGZXWP_kk-w@mail.gmail.com>
Date:	Fri, 27 Apr 2012 11:50:58 +0530
From:	"Shilimkar, Santosh" <santosh.shilimkar@...com>
To:	Kevin Hilman <khilman@...com>
Cc:	NeilBrown <neilb@...e.de>, Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Rafael J. Wysocki" <rjw@...k.pl>, linux-omap@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-pm@...r.kernel.org
Subject: Re: [PATCH 1/3] ARM: omap2+: set IRQCHIP_SKIP_SET_WAKE for INTC interrupts.

On Fri, Apr 27, 2012 at 2:09 AM, Kevin Hilman <khilman@...com> wrote:
> NeilBrown <neilb@...e.de> writes:
>

[...]

>
> From 644742ddae59731bc10aacde94645d7c49ca5ecd Mon Sep 17 00:00:00 2001
> From: NeilBrown <neilb@...e.de>
> Date: Wed, 25 Apr 2012 13:05:24 +1000
> Subject: [PATCH] ARM: omap2+: set IRQCHIP_SKIP_SET_WAKE for INTC interrupts.
>
> Without an ->irq_set_wake() method in an irq_chip, calls to
> enable_irq_wake() will fail.  This also causes these interrupts to not
> be able to abort suspend (via check_wakeup_irqs() in late suspend.)
>
> Currently, we don't implement ->irq_set_wake() for INTC interrupts
> because they default to be wakeup enabled by setting the GRPSEL bits
> in PM init.  Even though there is no ->irq_set_wake(), we want
> enable_irq_wake() to succeed so these interrupts can abort suspend
> when necessary.
>
> To fix, set IRQCHIP_SKIP_SET_WAKE flag for all the INTC
> interrupts which avoids trying to check irq_chip->irq_set_wake()
> and failing when it doesn't exist.
>
> Longer term, we need to implement ->irq_set_wake() for the INTC
> which can manage the appropriate GRPSEL bits.
>
> Signed-off-by: NeilBrown <neilb@...e.de>
> [khilman@...com: rework changelog]
> Signed-off-by: Kevin Hilman <khilman@...com>
> ---
Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>
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