diff --git a/drivers/mfd/mcp-core.c b/drivers/mfd/mcp-core.c
index 6063dc2..57271cb 100644
--- a/drivers/mfd/mcp-core.c
+++ b/drivers/mfd/mcp-core.c
@@ -214,7 +214,7 @@
 
 int mcp_host_register(struct mcp *mcp)
 {
-	strcpy(mcp->attached_device.bus_id, "mcp0");
+	dev_set_name(&mcp->attached_device, "mcp0");
 	return device_register(&mcp->attached_device);
 }
 EXPORT_SYMBOL(mcp_host_register);
diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c
index 6860c92..fea9085 100644
--- a/drivers/mfd/ucb1x00-core.c
+++ b/drivers/mfd/ucb1x00-core.c
@@ -492,7 +492,7 @@
 
 	ucb->dev.class = &ucb1x00_class;
 	ucb->dev.parent = &mcp->attached_device;
-	strlcpy(ucb->dev.bus_id, "ucb1x00", sizeof(ucb->dev.bus_id));
+	dev_set_name(&ucb->dev, "ucb1x00");
 
 	spin_lock_init(&ucb->lock);
 	spin_lock_init(&ucb->io_lock);