Re: [PATCH] i2c: rcar: fix a possible NULL dereference
From: Uwe Kleine-König
Date: Thu Nov 12 2015 - 04:03:19 EST
On Thu, Nov 12, 2015 at 09:48:37AM +0100, Wolfram Sang wrote:
> On Thu, Nov 12, 2015 at 09:09:26AM +0100, Uwe Kleine-König wrote:
> > Hello Wolfram,
> > On Thu, Nov 12, 2015 at 08:52:38AM +0100, Wolfram Sang wrote:
> > > On Thu, Nov 12, 2015 at 08:44:47AM +0100, Uwe Kleine-König wrote:
> > > > Other than that, the NULL pointer dereference should only happen if the
> > > > device was bound using the driver name. That might be worth to point out
> > > > in the commit log. So maybe make (in a separate patch) the probe
> > > > function fail when probed by name?
> > >
> > > RCar is a DT only platform.
> > Does this imply that no checking is needed? I'm not sure.
> I don't see how this driver could get probed otherwise. That being said,
> for the "better safe than sorry" approach, I'd accept your suggestion.
Try adding the following to a device tree:
This creates a platform device with name=i2c-rcar which makes
platform_match() yield a match for your driver.
(The other alternative is a device with this name created by a platform
file (even if this is not an rcar machine) doesn't trigger that problem
here I think, because there is a platform_device_id with a matching
for a similar discussion.
Pengutronix e.K. | Uwe Kleine-König |
Industrial Linux Solutions | http://www.pengutronix.de/ |
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/