Re: [2.6 patch] drivers/thermal/thermal.c: fix a check-after-use

Adrian Bunk
2008-02-20T00:27:07Z

On Tue, Feb 19, 2008 at 04:25:02PM -0800, Harvey Harrison wrote:
> On Wed, 2008-02-20 at 02:14 +0200, Adrian Bunk wrote:
> > This patch fixes a check-after-use spotted by the Coverity checker.
> >
> > Signed-off-by: Adrian Bunk <bunk@kernel.org>
> >
> > ---
> > 570462ca4441d8d63dfd46efe6e5b2b1c251a611 diff --git a/drivers/thermal/thermal.c b/drivers/thermal/thermal.c
> > index e782b3e..958654b 100644
> > --- a/drivers/thermal/thermal.c
> > +++ b/drivers/thermal/thermal.c
> > @@ -308,10 +308,10 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
> > struct thermal_cooling_device_instance *pos;
> > int result;
> >
> > - if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
> > + if (!tz || !cdev)
> > return -EINVAL;
> >
> > - if (!tz || !cdev)
> > + if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
> > return -EINVAL;
> >
>
> How about:
> if (!tz || !cdev || trip >= tz->trips ||
> (trip < 0 && trip != THERMAL_TRIPS_NONE))
> return -EINVAL;

I have no strong opinion about it, but I'd consider your suggestion less
readable.

> Cheers,
>
> Harvey

cu
Adrian

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