linux-kernel - Re: [PATCH V4 03/12] drivers: Add boot constraints core

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Date:   Wed, 13 Dec 2017 15:29:57 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        robdclark@...il.com, s.hauer@...gutronix.de,
        l.stach@...gutronix.de, shawnguo@...nel.org, fabio.estevam@....com,
        nm@...com, xuwei5@...ilicon.com, robh+dt@...nel.org
Subject: Re: [PATCH V4 03/12] drivers: Add boot constraints core

On 13-12-17, 10:42, Greg Kroah-Hartman wrote:
> On Sun, Oct 29, 2017 at 07:18:51PM +0530, Viresh Kumar wrote:
> > +	/*
> > +	 * Remove boot constraints for both successful and unsuccessful probe(),
> > +	 * except for the case where EPROBE_DEFER is returned by probe().
> > +	 */
> > +	if (ret != -EPROBE_DEFER)
> > +		dev_boot_constraints_remove(dev);
> 
> This feels odd, but ok, I trust you :)

I did this because it may not be right to keep the boot constraints up for a
device that failed to probe. For example, a LCD screen may continue wasting
power if its device failed to probe. At least I would like to see a real case
where we don't want to remove the constraints here on probe failure.

> > +/* Forward declarations of constraint specific callbacks */
> > +#endif /* _CORE_H */
> 
> What is this comment at the end of the file for?

Perhaps this should be moved to a later patch.

Ack for every other comment you gave.

-- 
viresh