linux-kernel - RE: [RFC/PATCH 2/4] input: misc: twl4030: move to request_threaded

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Message-ID: <EAF47CD23C76F840A9E7FCE10091EFAB02BC14229C@dbde02.ent.ti.com>
Date:	Mon, 14 Dec 2009 18:46:13 +0530
From:	"Shilimkar, Santosh" <santosh.shilimkar@...com>
To:	"felipe.balbi@...ia.com" <felipe.balbi@...ia.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>,
	"Koskinen Aaro (Nokia-D/Helsinki)" <aaro.koskinen@...ia.com>,
	David Brownell <david-b@...bell.net>,
	Linux USB Mailing List <linux-usb@...r.kernel.org>,
	Anton Vorontsov <avorontsov@...mvista.com>,
	Grazvydas Ignotas <notasas@...il.com>,
	"Chikkature Rajashekar, Madhusudhan" <madhu.cr@...com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Samuel Ortiz <sameo@...nedhand.com>
Subject: RE: [RFC/PATCH 2/4] input: misc: twl4030: move to
 request_threaded_irq

> -----Original Message-----
> From: Felipe Balbi [mailto:felipe.balbi@...ia.com]
> Sent: Monday, December 14, 2009 5:10 PM
> To: Shilimkar, Santosh
> Cc: Balbi Felipe (Nokia-D/Helsinki); linux-kernel@...r.kernel.org; Linux OMAP Mailing List; Tony
> Lindgren; Koskinen Aaro (Nokia-D/Helsinki); David Brownell; Linux USB Mailing List; Anton Vorontsov;
> Grazvydas Ignotas; Chikkature Rajashekar, Madhusudhan; Greg Kroah-Hartman; Mark Brown; Samuel Ortiz
> Subject: Re: [RFC/PATCH 2/4] input: misc: twl4030: move to request_threaded_irq
> 
> Hi,
> 
> On Mon, Dec 14, 2009 at 12:31:11PM +0100, ext Shilimkar, Santosh wrote:
> >In whole of the series the ISR you have converted to threads using threaded_irq are very
> >small in size. They are like quick_change_handlers. So only advantage is the particular
> >interrupt is masked for bit longer than with you change.
> >
> >I might be wrong here but it might introduce the spurious IRQ's because
> >of bit of delay in the processing.What is the motive for this change ?
> >Are we using this API as it suppose to be ?
> 
> the irq chip is connected through i2c and that mandate us to handle irqs
> in thread context. Now that we have kernel-wise api for that, we're just
> moving towards it instead of definint our own stuff and the lockdep
> shortcuts we had to put before.
OK. I see your point now.

Regards,
Santosh 



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