diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 6ce72aa65425..ab21c846eb27 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -476,7 +476,7 @@ int of_irq_to_resource_table(struct device_node *dev, struct resource *res,
 	int i;
 
 	for (i = 0; i < nr_irqs; i++, res++)
-		if (!of_irq_to_resource(dev, i, res))
+		if (of_irq_to_resource(dev, i, res) <= 0)
 			break;
 
 	return i;
diff --git a/scripts/dtc/dtx_diff b/scripts/dtc/dtx_diff
index fb86f3899e16..f9a3d8d23c64 100755
--- a/scripts/dtc/dtx_diff
+++ b/scripts/dtc/dtx_diff
@@ -321,7 +321,7 @@ fi
 cpp_flags="\
 	-nostdinc                                  \
 	-I${srctree}/arch/${ARCH}/boot/dts         \
-	-I${srctree}/arch/${ARCH}/boot/dts/include \
+	-I${srctree}/scripts/dtc/include-prefixes  \
 	-I${srctree}/drivers/of/testcase-data      \
 	-undef -D__DTS__"