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

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Date:	Sat, 11 Jul 2009 15:47:24 +0530
From:	Jaswinder Singh Rajput <jaswinder@...nel.org>
To:	Jiri Slaby <jirislaby@...il.com>
Cc:	Julia Lawall <julia@...u.dk>, gregkh@...e.de,
	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, 2009-07-11 at 10:17 +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.
> 

Why useless, it should be non-null before setting to dev.

But issue is why function name like kevent() is global and who is using
it.

> > +    dev = macp->device;
> 
> 

Thanks,
--
JSR

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