1 files changed, 9 insertions, 7 deletions

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 6d3dd3988d0..19c0115092d 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -60,27 +60,27 @@ EXPORT_SYMBOL_GPL(irq_of_parse_and_map);
  */
 struct device_node *of_irq_find_parent(struct device_node *child)
 {
-        struct device_node *p, *c = child;
+        struct device_node *p;
         const __be32 *parp;
 
-        if (!of_node_get(c))
+        if (!of_node_get(child))
                 return NULL;
 
         do {
-                parp = of_get_property(c, "interrupt-parent", NULL);
+                parp = of_get_property(child, "interrupt-parent", NULL);
                 if (parp == NULL)
-                        p = of_get_parent(c);
+                        p = of_get_parent(child);
                 else {
                         if (of_irq_workarounds & OF_IMAP_NO_PHANDLE)
                                 p = of_node_get(of_irq_dflt_pic);
                         else
                                 p = of_find_node_by_phandle(be32_to_cpup(parp));
                 }
-                of_node_put(c);
-                c = p;
+                of_node_put(child);
+                child = p;
         } while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL);
 
-        return (p == child) ? NULL : p;
+        return p;
 }
 
 /**
@@ -424,6 +424,8 @@ void __init of_irq_init(const struct of_device_id *matches)
 
                 desc->dev = np;
                 desc->interrupt_parent = of_irq_find_parent(np);
+                if (desc->interrupt_parent == np)
+                        desc->interrupt_parent = NULL;
                 list_add_tail(&desc->list, &intc_desc_list);
         }