Messages in this thread | | | Date | Fri, 20 Jul 2012 08:00:42 -0700 | From | Greg Kroah-Hartman <> | Subject | Re: [patch] driver-core: dev_to_node() should handle NULL pointers |
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On Fri, Jul 20, 2012 at 09:56:23AM +0300, Dan Carpenter wrote: > What prompted this patch is that in dma_pool_create() we call > dev_to_node() before checking whether "dev" is NULL. It looks like > there are places which call dma_pool_create() with a NULL pointer. An > example is in drivers/usb/gadget/amd5536udc.c. > > Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> > --- > Static checker fix. > > diff --git a/include/linux/device.h b/include/linux/device.h > index aa7b3b4..c80e7a8d 100644 > --- a/include/linux/device.h > +++ b/include/linux/device.h > @@ -714,7 +714,9 @@ int dev_set_name(struct device *dev, const char *name, ...); > #ifdef CONFIG_NUMA > static inline int dev_to_node(struct device *dev) > { > - return dev->numa_node; > + if (dev) > + return dev->numa_node; > + return -1;
What happens if this function returns -1? Can the callers properly handle this?
thanks,
greg k-h
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