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-rw-r--r--kernel/resource.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 7b36976..9c9841c 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -453,6 +453,8 @@ static struct resource * __insert_resource(struct resource *parent, struct resou
if (first == parent)
return first;
+ if (WARN_ON(first == new)) /* duplicated insertion */
+ return first;
if ((first->start > new->start) || (first->end < new->end))
break;
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