linux-kernel - Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software Interface

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Message-ID: <1455116893.8878.15.camel@suse.de>
Date:	Wed, 10 Feb 2016 16:08:13 +0100
From:	Oliver Neukum <oneukum@...e.de>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
Cc:	Felipe Balbi <balbi@...nel.org>,
	Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
	Mathias Nyman <mathias.nyman@...ux.intel.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	USB <linux-usb@...r.kernel.org>
Subject: Re: [PATCH 2/3] usb: type-c: USB Type-C Connector System Software
 Interface

On Wed, 2016-02-10 at 16:24 +0200, Andy Shevchenko wrote:
> On Wed, Feb 10, 2016 at 4:15 PM, Oliver Neukum <oneukum@...e.com> wrote:
> > On Wed, 2016-02-10 at 13:56 +0200, Andy Shevchenko wrote:
> >> > +err:
> >> > +       if (i > 0)
> >> > +               for (; i >= 0; i--, con--)
> >> > +                       typec_unregister_port(con->port);
> >>
> >> Perhaps
> >>
> >> while (--i >= 0) {
> >>  ...
> >> }
> >
> > While we are at it. No we should not change the semantics
> > of conditionals for the sake of appearance.
> 
> I'm sorry I didn't get you.
> How this more or less standard pattern to clean up stuff on error path
> does with conditional semantics?

You change a postdecrement to a predecrement. The highest
number the loop is executed for is changed.

	Oliver