linux-kernel - Re: [PATCH v4 2/3] i2c: iproc: Add Broadcom iProc I2C Driver

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Message-ID: <20150117224021.GA26493@n2100.arm.linux.org.uk>
Date:	Sat, 17 Jan 2015 22:40:21 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Ray Jui <rjui@...adcom.com>
Cc:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>, Wolfram Sang <wsa@...-dreams.de>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...aro.org>,
	Christian Daudt <bcm@...thebug.org>,
	Matt Porter <mporter@...aro.org>,
	Florian Fainelli <f.fainelli@...il.com>,
	Scott Branden <sbranden@...adcom.com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	bcm-kernel-feedback-list@...adcom.com, devicetree@...r.kernel.org
Subject: Re: [PATCH v4 2/3] i2c: iproc: Add Broadcom iProc I2C Driver

On Sat, Jan 17, 2015 at 01:26:41PM -0800, Ray Jui wrote:
> 	time_left = wait_for_completion_timeout(&iproc_i2c->done, time_left);
> 
> 	/* disable all interrupts */
> 	writel(0, iproc_i2c->base + IE_OFFSET);
> 
> 	if (!time_left && !atomic_read(&iproc_i2c->transfer_is_successful)) {

Why are you using atomic_read() here?

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