linux-kernel - Re: [PATCH v2] prism54: prism54_get_encode() test below 0 on unsigned index

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Message-ID: <43e72e890804271248i1fbeb16ev7b05149a8d9adaf1@mail.gmail.com>
Date:	Sun, 27 Apr 2008 12:48:34 -0700
From:	"Luis R. Rodriguez" <mcgrof@...il.com>
To:	"Roger While" <simrw@...-basis.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] prism54: prism54_get_encode() test below 0 on unsigned index

On Sun, Apr 27, 2008 at 5:25 AM, Roger While <simrw@...-basis.de> wrote:
> Luis Rodriguez wrote :
>
>
>
> > The check for -1 seems silly lets just remove its use.
> >
> > Signed-off-by: Luis R. Rodriguez <lrodriguez@...eros.com>
> >
> > diff --git a/drivers/net/wireless/prism54/isl_ioctl.c
> b/drivers/net/wireless/prism54/isl_ioctl.c
> > index 5b375b2..7e2d3b6 100644
> > --- a/drivers/net/wireless/prism54/isl_ioctl.c
> > +++ b/drivers/net/wireless/prism54/isl_ioctl.c
> > @@ -1158,7 +1158,7 @@ prism54_get_encode(struct net_device *ndev, struct
> iw_request_info *info,
> >  {
> >        islpci_private *priv = netdev_priv(ndev);
> >        struct obj_key *key;
> > -       u32 devindex, index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
> > +       u32 devindex, index = (dwrq->flags & IW_ENCODE_INDEX);
> >        u32 authen = 0, invoke = 0, exunencrypt = 0;
> >        int rvalue;
> >        union oid_res_t r;
> > @@ -1186,7 +1186,7 @@ prism54_get_encode(struct net_device *ndev, struct
> iw_request_info *info,
> >        rvalue |= mgt_get_request(priv, DOT11_OID_DEFKEYID, 0, NULL, &r);
> >        devindex = r.u;
> >        /* Now get the key, return it */
> > -       if (index == -1 || index > 3)
> > +       if (!index || index > 3)
> >                /* no index provided, use the current one */
> >                index = devindex;
> >        rvalue |= mgt_get_request(priv, DOT11_OID_DEFKEYX, index, NULL,
> &r);
> >
>
>  This does not look right to me. Should this not be -
>   if (!index || index > 4)
>    ....
>   else
>   index -= 1;
>  (Or alternatively pass index -1 to mgt_get_request)
>
>  Also 5 lines further on we have -
>         /* return the used key index */
>         dwrq->flags |= devindex + 1;
>  which looks suspect.

Yeah and you're patch already went in. Its OK, was just not likin the -1 stuff.

  Luis
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