Re: [PATCH] isdn_v110 warning fix

[Jesper Juhl <jesper.juhl@gmail.com>]

On 8/30/05, Alexey Dobriyan <adobriyan@gmail.com> wrote:
> On Tue, Aug 30, 2005 at 01:05:43AM +0200, Jesper Juhl wrote:
> > drivers/isdn/i4l/isdn_v110.c:523: warning: `ret' might be used uninitialized in this function
> 
> > --- linux-2.6.13-orig/drivers/isdn/i4l/isdn_v110.c
> > +++ linux-2.6.13/drivers/isdn/i4l/isdn_v110.c
> > @@ -516,11 +516,11 @@
> 
> > -isdn_v110_stat_callback(int idx, isdn_ctrl * c)
> > +isdn_v110_stat_callback(int idx, isdn_ctrl *c)
> >  {
> >       isdn_v110_stream *v = NULL;
> >       int i;
> > -     int ret;
> > +     int ret = 0;
> 
> ret is used only in isdn_v110_stat_callback()::case ISDN_STAT_BSENT.
> It's possible for it to be unused only if passed c->parm.length is 0.
> Do you see codepaths that can do it?
> 
No, I don't see any codepaths that could lead to it being used uninitialized. 
I made the patch for two reasons;  1) To silence the warning, and I
guess it's simply the right thing to do.   2) To make sure the code
behaves in a resonably sane way in case the situation
c->parm.length==0 should somehow happen in the future.

-- 
Jesper Juhl <jesper.juhl@gmail.com>
Don't top-post  http://www.catb.org/~esr/jargon/html/T/top-post.html
Plain text mails only, please      http://www.expita.com/nomime.html