linux-kernel - CodingStyle

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Message-ID: <24DF37198A1E704D9811D8F72B87EB514191EABF@NB-EX-MBX02.diasemi.com>
Date:	Thu, 18 Apr 2013 10:48:06 +0000
From:	"Opensource [Anthony Olech]" <anthony.olech.opensource@...semi.com>
To:	Guenter Roeck <linux@...ck-us.net>,
	"Opensource [Anthony Olech]" <anthony.olech.opensource@...semi.com>
CC:	LKML <linux-kernel@...r.kernel.org>
Subject: CodingStyle

> -----Original Message-----
> From: Guenter Roeck [mailto:linux@...ck-us.net]
> Sent: 18 April 2013 05:14
> To: Opensource [Anthony Olech]
> Cc: Jean Delvare; Mark Brown; Randy Dunlap; lm-sensors@...sensors.org;
> LKML; David Dajun Chen
> Subject: Re: [NEW DRIVER V5 6/7] drivers/hwmon: DA9058 HWMON driver
> 
[...]
> > +	if (cell == NULL) {
> > +		ret = -ENODEV;
> > +		goto exit;
> 
> Just return -ENODEV is good enough here. See CodingStyle, chapter 7.
> 
[...]
> > +exit:
> > +	return ret;
> > +}
[...]

Hi Guenter,

I have read CodingStyle, chapter 7 and it seems to encourage a single exit point from functions.

During development there was some logging done at the (single) exit point but that has been stripped out for submission.
Whilst I can duplicate the logging and do an immediate 'return' at all those points, I am hesitant to do so when chapter 7 of the CodingStyle appears to say to use a single exit point. In addition I had thought that a single exit point from functions was a good thing.

Tony Olech

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