Commit debd3a3b authored May 24, 2017 by Sakari Ailus Committed by Rob Herring Jun 01, 2017

of: Make of_fwnode_handle() safer



On the expense of a little bit more complexity in the of_fwnode_handle()
macro, make the macro result in NULL in case its argument is NULL while
still referencing it only once.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Rob Herring <robh@kernel.org>

parent 1df09bc6

include/linux/of.h

+7 −1

Original line number	Diff line number	Diff line
		@@ -159,7 +159,13 @@ static inline struct device_node to_of_node(struct fwnode_handle fwnode)
		container_of(fwnode, struct device_node, fwnode) : NULL;
		}

		#define of_fwnode_handle(node) (&(node)->fwnode)
		#define of_fwnode_handle(node) \
		({ \
		typeof(node) __of_fwnode_handle_node = (node); \
		\
		__of_fwnode_handle_node ? \
		&__of_fwnode_handle_node->fwnode : NULL; \
		})

		static inline bool of_have_populated_dt(void)
		{

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