linux-kernel - Re: [patch] power: battery: pointer math issue in gab

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Date:	Mon, 05 Nov 2012 21:34:21 +0900
From:	anish kumar <anish198519851985@...il.com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Anton Vorontsov <cbou@...l.ru>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [patch] power: battery: pointer math issue in gab_probe()

Hello Dan,

Is this patch of yours picked up by anyone?
On Sun, 2012-09-30 at 09:38 +0530, anish kumar wrote:
> On Sat, 2012-09-29 at 10:13 +0300, Dan Carpenter wrote:
> > psy->properties is an enum (32 bit type) so adding sizeof() puts us
> > four times further along than we intended.  It should be cast to a char
> > pointer before doing the math.
> You really read this driver to find out this one.
> Good one.
> > 
> > Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
> > ---
> > Casting to void * would also work on GCC, at least.
> > 
> > diff --git a/drivers/power/generic-adc-battery.c b/drivers/power/generic-adc-battery.c
> > index 9bdf444..776f118 100644
> > --- a/drivers/power/generic-adc-battery.c
> > +++ b/drivers/power/generic-adc-battery.c
> > @@ -279,7 +279,8 @@ static int __devinit gab_probe(struct platform_device *pdev)
> >  	}
> >  
> >  	memcpy(psy->properties, gab_props, sizeof(gab_props));
> > -	properties = psy->properties + sizeof(gab_props);
> > +	properties = (enum power_supply_property *)
> > +				((char *)psy->properties + sizeof(gab_props));
> >  
> >  	/*
> >  	 * getting channel from iio and copying the battery properties
> 


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