diff --git a/drivers/mfd/sm501.c b/drivers/mfd/sm501.c
index ccd62b96395281..6d2f4a0a901dc0 100644
--- a/drivers/mfd/sm501.c
+++ b/drivers/mfd/sm501.c
@@ -1415,8 +1415,14 @@ static int sm501_plat_probe(struct platform_device *dev)
 		goto err_claim;
 	}
 
-	return sm501_init_dev(sm);
+	ret = sm501_init_dev(sm);
+	if (ret)
+		goto err_unmap;
+
+	return 0;
 
+ err_unmap:
+	iounmap(sm->regs);
  err_claim:
 	release_mem_region(sm->io_res->start, 0x100);
  err_res: