linux-kernel - Re: [PATCH v5 2/3] i2c: iproc: Add Broadcom iProc I2C Driver

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Date:	Sun, 18 Jan 2015 12:42:55 +0100
From:	Wolfram Sang <wsa@...-dreams.de>
To:	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Cc:	Arend van Spriel <arend@...adcom.com>, Ray Jui <rjui@...adcom.com>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Christian Daudt <bcm@...thebug.org>,
	Russell King <linux@....linux.org.uk>,
	Scott Branden <sbranden@...adcom.com>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Florian Fainelli <f.fainelli@...il.com>,
	Matt Porter <mporter@...aro.org>, linux-kernel@...r.kernel.org,
	Rob Herring <robh+dt@...nel.org>,
	bcm-kernel-feedback-list@...adcom.com, linux-i2c@...r.kernel.org,
	Grant Likely <grant.likely@...aro.org>,
	Kumar Gala <galak@...eaurora.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v5 2/3] i2c: iproc: Add Broadcom iProc I2C Driver

On Sun, Jan 18, 2015 at 12:17:59PM +0100, Uwe Kleine-König wrote:
> Hello Wolfram,
> 
> On Sun, Jan 18, 2015 at 12:06:58PM +0100, Wolfram Sang wrote:
> > On Sun, Jan 18, 2015 at 10:47:41AM +0100, Uwe Kleine-König wrote:
> > > On Sun, Jan 18, 2015 at 10:14:04AM +0100, Arend van Spriel wrote:
> > > > On 01/17/15 00:42, Ray Jui wrote:
> > > > >+	complete_all(&iproc_i2c->done);
> > > > 
> > > > Looking over this code it seems to me there is always a single
> > > > process waiting for iproc_i2c->done to complete. So using complete()
> > > > here would suffice.
> > > Yeah, there is always only a single thread waiting. That means both
> > > complete and complete_all are suitable. AFAIK there is no reason to pick
> > > one over the other in this case.
> > 
> > Clarity?
> And which do you consider more clear? complete_all might result in the
> question: "Is there >1 waiter?" and complete might yield to "What about
> the other waiters?". If you already know there is only one, both are on
> par on clarity. Might only be me?! I don't care much.

It is minor, I agree: If I read complete_all, I assume there is
something fishy if there is only one waiter. It doesn't match. It might
work, but I'll wonder if this is accidently or intentionally.


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