linux-kernel - Re: [PATCH] staging: silicom: fix 'return is not a function, parentheses are not required' in bpctl

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Date:	Fri, 6 Dec 2013 02:21:40 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Joe Perches <joe@...ches.com>
Cc:	Will Tange <bh34rt@...il.com>, gregkh@...uxfoundation.org,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: silicom: fix 'return is not a function,
 parentheses are not required' in bpctl_mod.c

On Thu, Dec 05, 2013 at 03:09:15PM -0800, Joe Perches wrote:
> On Fri, 2013-12-06 at 01:50 +0300, Dan Carpenter wrote:
> > On Thu, Dec 05, 2013 at 10:23:53PM +0100, Will Tange wrote:
> > > Fixes warnings regarding redundant parantheses thrown by the checkpatch tool in bpctl_mod.c
> []
> > 	if (ret < 0)
> > 		return BP_NOT_CAP;
> > 	if (ret == 0)
> > 		return 1;
> > 	return 0;
> > 
> > More lines, but simpler to understand than the original.
> > 
> > Think of checkpatch.pl as a pointer to bad code and not that we just
> > have to silence checkpatch and move on.
> 
> So true.
> 
> If 0 is the expected ret value and 1 is the
> expected function return for not-errored use,
> I suggest changing the last bit to:
> 
> 	if (ret < 0)
> 		return BP_NOT_CAP;
> 	else if (ret > 0)
> 		return 0;
> 
> 	return 1;
> 
> so that the error conditions are done first
> and the normal return is at the bottom of
> the function.

In this function, -1 means fail, 1 means "on" and 0 means "off".  I
sorted them from lowest to highest: negative, zero and greater than
zero.

regards,
dan carpenter
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