linux-kernel - Re: [PATCH] staging: speakup: replace simple

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Message-ID: <20141218212502.GP4856@mwanda>
Date:	Fri, 19 Dec 2014 00:25:02 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	samuel kihahu <skihahu@...il.com>
Cc:	devel@...verdev.osuosl.org, gregkh@...uxfoundation.org,
	speakup@...ux-speakup.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: speakup: replace simple_strtoul with kstrtoul

On Thu, Dec 18, 2014 at 05:48:10PM +0300, samuel kihahu wrote:
> On Wed, Dec 17, 2014 at 05:03:22PM +0300, Dan Carpenter wrote:
> > On Wed, Dec 17, 2014 at 04:43:54PM +0300, samuel kihahu wrote:
> > > On Wed, Dec 17, 2014 at 03:11:19PM +0300, Dan Carpenter wrote:
> > > > On Wed, Dec 17, 2014 at 02:56:02PM +0300, samuel kihahu wrote:
> > > > > Replacing obsolete simple_strtoul with kstrtoul.
> > > > > 
> > > > 
> > > > Nope.  That's wrong.  Learn how the functions are different beyond just
> > > > the name.
> > > Noted, have made corrections to fit the kstrtoul and handle the return
> > > value.
> > 
> > You have to compile test these things.  Really kernel programming is not
> > a good way to learn how to program.  :(
> > 
> > regards,
> > dan carpenter
> > 
> 
> Appreciate the feedback, have modified the patch, tested and confirmed
> it builds.

No.  It's still really wrong.  One of the key differences between
kstrtoul() and simple_strtoul() is that simple_strtoul() gives you a
pointer to the end of the string.

It's actually best to use simple_strtoul() here.  Checkpatch.pl is
wrong.

As well the new error handling doesn't work at all.

regards,
dan carpenter

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