diff --git a/kernel/resource.c b/kernel/resource.c
index bce773cc5e4169022d8a1f5fbc6380771ae41fe2..7dd11c78c738501cdd82b6c084db51a3c417fb16 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -377,7 +377,7 @@ static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
 				 int (*func)(struct resource *, void *))
 {
 	struct resource res;
-	int ret = -1;
+	int ret = -EINVAL;
 
 	while (start < end &&
 	       !find_next_iomem_res(start, end, flags, desc,
@@ -456,7 +456,7 @@ int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,
 	unsigned long flags;
 	struct resource res;
 	unsigned long pfn, end_pfn;
-	int ret = -1;
+	int ret = -EINVAL;
 
 	start = (u64) start_pfn << PAGE_SHIFT;
 	end = ((u64)(start_pfn + nr_pages) << PAGE_SHIFT) - 1;