linux-kernel - Re: [PATCH 5/5] staging/otus: Move a dereference below a NULL test

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Message-ID: <20090711170356.GA5205@suse.de>
Date:	Sat, 11 Jul 2009 10:03:56 -0700
From:	Greg KH <gregkh@...e.de>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Julia Lawall <julia@...u.dk>, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 5/5] staging/otus: Move a dereference below a NULL test

On Sat, Jul 11, 2009 at 10:17:24AM +0200, Jiri Slaby wrote:
> On 07/11/2009 09:51 AM, Julia Lawall wrote:
> > diff -u -p a/drivers/staging/otus/wwrap.c b/drivers/staging/otus/wwrap.c
> > --- a/drivers/staging/otus/wwrap.c
> > +++ b/drivers/staging/otus/wwrap.c
> > @@ -1016,12 +1016,13 @@ void kevent(struct work_struct *work)
> >  {
> >      struct usbdrv_private *macp =
> >                 container_of(work, struct usbdrv_private, kevent);
> > -    zdev_t *dev = macp->device;
> > +    zdev_t *dev;
> >  
> >      if (macp == NULL)
> >      {
> >          return;
> >      }
> 
> The test is rather useless here.

Yes it is. 

Julia, if you just remove the NULL check, will that keep your scripts
happy from noticing such a "problem"?

thanks,

greg k-h
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