linux-kernel - Re: [PATCH v9 1/2] Use "request_muxed

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Message-ID: <20110520114839.GS17887@infomag.iguana.be>
Date:	Fri, 20 May 2011 13:48:39 +0200
From:	Wim Van Sebroeck <wim@...ana.be>
To:	Nat Gurumoorthy <natg@...gle.com>
Cc:	Jean Delvare <khali@...ux-fr.org>,
	Guenter Roeck <guenter.roeck@...csson.com>,
	lm-sensors@...sensors.org, linux-kernel@...r.kernel.org,
	linux-watchdog@...r.kernel.org, mikew@...gle.com
Subject: Re: [PATCH v9 1/2] Use "request_muxed_region" in it87 watchdog
	drivers

Hi Nat,

> 01 - Changes to it87 watchdog driver to use "request_muxed_region"
> Serialize access to the hardware by using "request_muxed_region" macro defined
> by Alan Cox. Call to this macro will hold off the requestor if the resource is
> currently busy. 
> 
> The use of the above macro makes it possible to get rid of
> spinlocks in it8712f_wdt.c and it87_wdt.c watchdog drivers.
> This also greatly simplifies the implementation of it87_wdt.c driver.
> 
>  "superio_enter" will return an error if call to "request_muxed_region" fails. 
> Rest of the code change is to ripple an error return from superio_enter to
> the top level.
> 
> Signed-off-by: Nat Gurumoorthy <natg@...gle.com>

Added to linux-2.6-watchdog-next.

Kind regards,
Wim.

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