Commit debd3a3b authored by Sakari Ailus's avatar Sakari Ailus Committed by Rob Herring

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: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: default avatarKieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent 1df09bc6
......@@ -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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