diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 3be4b99..81cedca 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -262,6 +262,8 @@
 		return NULL;
 
 	res = request_iomem_region(dev_name(dev), res->start, res->size);
+	if (!res)
+		return NULL;
 
 	return (void __force __iomem *)res->start;
 }