of: Don't try to search when phandle == 0

A value of '0' isn't a valid phandle, so searching for a node with that
phandle is pointless. It will result in nothing but false positives.

Signed-off-by: Grant Likely <grant.likely@linaro.org>

parent f2051d6a

drivers/of/base.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1021,6 +1021,9 @@ struct device_node *of_find_node_by_phandle(phandle handle)
		struct device_node *np;
		unsigned long flags;

		if (!handle)
		return NULL;

		raw_spin_lock_irqsave(&devtree_lock, flags);
		for (np = of_allnodes; np; np = np->allnext)
		if (np->phandle == handle)