linux-kernel - Re: [PATCH] genirq: Introduce irq_read

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Message-ID: <alpine.DEB.2.11.1410251033270.5308@nanos>
Date:	Sat, 25 Oct 2014 10:34:19 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Stephen Boyd <sboyd@...eaurora.org>
cc:	Marc Zyngier <marc.zyngier@....com>,
	Bjorn Andersson <bjorn@...o.se>,
	Linus Walleij <linus.walleij@...aro.org>,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Abhijeet Dharmapurikar <adharmap@...eaurora.org>
Subject: Re: [PATCH] genirq: Introduce irq_read_line()

On Fri, 24 Oct 2014, Stephen Boyd wrote:

> On 10/24/2014 10:59 AM, Marc Zyngier wrote:
> > Hi Bjorn,
> >
> > On 24/10/14 18:31, Bjorn Andersson wrote:
> >>
> >> Stephen Boyd talked about the need to be able to mask/unmask interrupts from
> >> client code in the Qualcomm platform as well - most likely to block wakeup
> >> sources(?)
> > What's wrong with irq_disable?
> 
> The problem is irq_disable() is lazy and doesn't actually disable the
> interrupt.

Nothing prevents you from adding your own irq_disable() callback for
those interrupts. Just the default is lazy.

Thanks,

	tglx
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