Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 11 Nov 2010 16:44:07 +0100 | From | Uwe Kleine-König <> | Subject | Re: [PATCH] mfd: check for NULL platform data |
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Hi Fabio,
On Thu, Nov 11, 2010 at 06:58:14AM -0800, Fabio Estevam wrote: > Avoid kernel crash if platform data is NULL. > > Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> > --- > drivers/mfd/mc13xxx-core.c | 3 +++ > 1 files changed, 3 insertions(+), 0 deletions(-) > > diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c > index a2ac2ed..b4d6bb1 100644 > --- a/drivers/mfd/mc13xxx-core.c > +++ b/drivers/mfd/mc13xxx-core.c > @@ -757,6 +757,9 @@ err_revision: > > mc13xxx_unlock(mc13xxx); > > + if (pdata == NULL) > + return 0; > + I'm not sure it's really needed to catch this error. Not passing pdata isn't sensible and then maybe failing with a bang is better than handling silently.
And if you want to break probing, do you really want to return 0, i.e. let the binding succeed? IMHO (if you really want to handle pdata == NULL) you should fail before allocating the private data with -ESOMETHINGSENSIBLE.
Thanks, Uwe
-- 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@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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