Hello,
On Wed, May 28, 2014 at 04:20:11PM +0100, Lee Jones wrote:
> On Wed, 28 May 2014, Emil Goode wrote:
>
> > The struct menelaus_vtg pointer vtg cannot be NULL here
> > so the condition is never true and if it ever was true
> > it would lead to a NULL pointer dereference when we goto
> > label set_voltage.
> >
> > Before the below patch was applied the code was:
> >
> > if (vtg == 0)
> >
> > The intention was to check if vtg_val is 0.
> >
> > commit 59a9f7a32adf6537b4e4db8ca204eeb77d7a634e
> > ("mfd: menelaus: Use NULL instead of 0")
> >
> > Signed-off-by: Emil Goode <emilgoode@xxxxxxxxx>
> > ---
> > Hello,
> >
> > This is only build tested, it would be good to get a comment
> > from someone who is familiar with this code.
> >
> > Found using coccinelle.
> >
> > Best regards,
> >
> > Emil Goode
> >
> > drivers/mfd/menelaus.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c
> > index ad25bfa..4859597 100644
> > --- a/drivers/mfd/menelaus.c
> > +++ b/drivers/mfd/menelaus.c
> > @@ -466,7 +466,7 @@ static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,
> > struct i2c_client *c = the_menelaus->client;
> >
> > mutex_lock(&the_menelaus->lock);
> > - if (!vtg)
> > + if (vtg_val == 0)
>
> I would prefer:
>
> if (!vtg_val)
Ok, I will resend.
Best regards,
Emil Goode
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