linux-kernel - Re: [PATCH update] PM: Introduce core framework for run-time PM of I/O devices (rev. 15)

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Date:	Wed, 12 Aug 2009 11:47:08 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Magnus Damm <magnus.damm@...il.com>
cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Greg KH <gregkh@...e.de>,
	Pavel Machek <pavel@....cz>, Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux-pm mailing list <linux-pm@...ts.linux-foundation.org>
Subject: Re: [PATCH update] PM: Introduce core framework for run-time PM of
  I/O devices (rev. 15)

On Wed, 12 Aug 2009, Magnus Damm wrote:

> > --- /dev/null
> > +++ linux-2.6/drivers/base/power/runtime.c
> [...]
> > +int __pm_runtime_suspend(struct device *dev, bool from_wq)
> > +       __releases(&dev->power.lock) __acquires(&dev->power.lock)
> [...]
> > +       if (dev->bus && dev->bus->pm && dev->bus->pm->runtime_suspend) {
> > +               spin_unlock_irq(&dev->power.lock);
> > +
> > +               retval = dev->bus->pm->runtime_suspend(dev);
> > +
> > +               spin_lock_irq(&dev->power.lock);
> > +               dev->power.runtime_error = retval;
> > +       } else {
> > +               retval = -ENOSYS;
> > +       }
> 
> Nit: { and } above do not follow the regular coding style.

As a matter of fact they do.  From Documentation/CodingStyle:


Do not unnecessarily use braces where a single statement will do.

if (condition)
	action();

This does not apply if one branch of a conditional statement is a single
statement. Use braces in both branches.

if (condition) {
	do_this();
	do_that();
} else {
	otherwise();
}


Alan Stern

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