linux-kernel - Re: [Outreachy kernel] [PATCH] staging: xgifb: correct the multiple line dereference to fix coding stye errors

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Date:   Tue, 21 Feb 2017 20:33:38 -0800
From:   Joe Perches <joe@...ches.com>
To:     Arushi Singhal <arushisinghal19971997@...il.com>
Cc:     Julia Lawall <julia.lawall@...6.fr>, arnaud.patard@...-net.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        outreachy-kernel@...glegroups.com
Subject: Re: [Outreachy kernel] [PATCH] staging: xgifb: correct the multiple
 line dereference to fix coding stye errors

On Wed, 2017-02-22 at 09:46 +0530, Arushi Singhal wrote:
> On Wed, Feb 22, 2017 at 12:12 AM, Joe Perches <joe@...ches.com> wrote:
> 
> > On Tue, 2017-02-21 at 18:40 +0100, Julia Lawall wrote:
> > > 
> > > On Tue, 21 Feb 2017, Arushi Singhal wrote:
> > > 
> > > > Error was reported by checkpatch.pl as
> > > > WARNING: Avoid multiple line dereference...
> > > > if there is boolean operator then it is fixed by Splitting line at
> > > > boolean operator.
> > > 
> > > This is massively execeeding the 80 character boundary, and not for
> > > something trivial like a string.  Maybe the code can be reorganized in
> > > some other way.
> > 
> > The easiest way to do that is to change the test above it
> > to reduce indentation from
> > 
> >         if (xgifb_info->display2 == XGIFB_DISP_TV &&
> >             xgifb_info->hasVB == HASVB_301) {
> >                 [code...];
> >         }
> > }
> > 
> > to
> > 
> >         if (xgifb_info->display2 != XGIFB_DISP_TV ||
> >             xgifb_in
> > fo->hasVB != HASVB_301)
> >                 return;
> > 
> >         [code...];
> > }
> > 
> > 
> 
> Hi
> So basically you are saying that cut one word and put the other part of the
> word in the next line.

No, evolution is a horrible email client
that wraps lines oddly sometimes and sends
out different content than it displays in
its on-screen editor.

What I am saying is the block after the test
can be unindented one level by inverting the
test and using return.

It should be:

	if (xgifb_info->display2 != XGIFB_DISP_TV ||
	    xgifb_in> > fo->hasVB != HASVB_301)
		return;

	[code...];

I sent you a separate attachment privately a
few hours ago but I'll attach it here too.

View attachment "foo.diff" of type "text/x-patch" (7434 bytes)