Re: [PATCH -next] smsc911x: Fix crash seen if neither ACPI nor OF is configured or used

[Tony Lindgren <tony@atomide.com>]

* Guenter Roeck <linux@roeck-us.net> [150826 13:58]:
> Hi Tony,
> 
> On 08/26/2015 01:16 PM, Tony Lindgren wrote:
> [ ... ]
> 
> >>We may need two separate patches, one to fix up device_property_read_u32()
> >>to return -ENXIO, and one to fix smsc911x_probe_config() to ignore the error
> >>from device_get_phy_mode(), and to bail out if device_property_read_u32()
> >>returns -ENXIO.
> >
> >I guess the device_property_read_u32() change needs to be discussed
> >separately.. So probably best to fix up the regression to smsc911x
> >first.
> >
> Not sure myself. Jeremy has a point - we don't really know for sure how
> safe it is to check for -ENODATA (in addition to -ENXIO). Also, fixing
> device_property_read_u32() turned out to be much easier than I thought.
> 
> >>The simpler alternative would be to check the return value from
> >>device_property_read_u32() for both -ENXIO and -ENODATA.
> >>This would make the code independent of the necessary core changes
> >>(which may take a while). I tested this variant, and it works, at least
> >>for the non-DT case.
> >>
> >>Does this make sense ?
> >
> >Yeh I think that would allow fixing up the smsc911x regression while
> >discussing the device_property_read_u32() change. Got a test patch
> >for me to try?
> >
> 
> You should have two by now to choose from.

Acked the second version thanks :)

Tony