linux-kernel - Re: Threaded interrupts for synaptic touchscreen in HTC dream

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Date:	Wed, 22 Jul 2009 17:15:59 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
cc:	Peter Zijlstra <peterz@...radead.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Trilok Soni <soni.trilok@...il.com>,
	Pavel Machek <pavel@....cz>, Arve Hj?nnev?g <arve@...roid.com>,
	kernel list <linux-kernel@...r.kernel.org>,
	Brian Swetland <swetland@...gle.com>,
	linux-input@...r.kernel.org, Andrew Morton <akpm@...l.org>,
	linux-i2c@...r.kernel.org,
	Joonyoung Shim <jy0922.shim@...sung.com>,
	m.szyprowski@...sung.com, t.fujak@...sung.com,
	kyungmin.park@...sung.com, David Brownell <david-b@...bell.net>,
	Daniel Ribeiro <drwyrm@...il.com>
Subject: Re: Threaded interrupts for synaptic touchscreen in HTC dream

On Wed, 22 Jul 2009, Mark Brown wrote:

> On Wed, Jul 22, 2009 at 04:52:21PM +0200, Thomas Gleixner wrote:
> > On Wed, 22 Jul 2009, Mark Brown wrote:
> 
> > > The chips I'm deling with can certainly support doing that but I'm not
> > > sure there'd be enormous advantages - a lot of the interrupt handlers
> > > will either be trivial (eg, RTC ticks or alarms) or be serialised by a
> > > need to interact with the chip anyway.  I'd expect this to be generally
> > > true, though ICBW.
> 
> > So in your case it would be possible to run the various subdevice
> > thread_fn handlers from your main interrupt thread one after each
> > other ?
> 
> That's what they're all doing at present outside of genirq.

They just are racy against disable/enable/request/free I guess :)
 
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