linux-kernel - Re: [PATCH 03/17] mmc: mmci: Mask IRQs for all variants during runtime suspend

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Message-ID: <20140218164614.GI21483@n2100.arm.linux.org.uk>
Date:	Tue, 18 Feb 2014 16:46:14 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Ulf Hansson <ulf.hansson@...aro.org>
Cc:	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Alessandro Rubini <rubini@...pv.it>,
	Linus Walleij <linus.walleij@...aro.org>,
	Wolfram Sang <wsa@...-dreams.de>,
	Chris Ball <chris@...ntf.net>, Mark Brown <broonie@...nel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
	"linux-spi@...r.kernel.org" <linux-spi@...r.kernel.org>,
	linux-mmc <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH 03/17] mmc: mmci: Mask IRQs for all variants during
	runtime suspend

On Tue, Feb 18, 2014 at 05:36:52PM +0100, Ulf Hansson wrote:
> If we add SDIO irq support to mmci in future; parts of that
> implementation includes a re-route of DAT1 to a GPIO irq when entering
> runtime suspend state. The mmci HW will in runtime suspend state, not
> be responsible for handling irqs, which is the same as of today.

Note that the "irq thread" in sdio_irq is scheduled for destruction -
it's buggy when the system is under high load and a driver claims a
SDIO irq.  Sched people hate it too...

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