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>
diff --git a/drivers/of/base.c b/drivers/of/base.c
index 293ed4b..2305dc0 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -1021,6 +1021,9 @@
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)