[PATCH 3/4] base: soc: Check for NULL SoC device attributes

On Tuesday, October 4, 2016 11:09:26 AM CEST Geert Uytterhoeven wrote:

If soc_device_match() is used to check the value of a specific
attribute that is not present for the current SoC, the kernel crashes
with a NULL pointer dereference.

Fix this by explicitly checking for the absence of a needed property,
and considering this a non-match.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Acked-by: Arnd Bergmann <arnd@arndb.de>