diff --git a/drivers/mmc/mmc_sysfs.c b/drivers/mmc/mmc_sysfs.c
index 96c1920..34fa4a3 100644
--- a/drivers/mmc/mmc_sysfs.c
+++ b/drivers/mmc/mmc_sysfs.c
@@ -263,10 +263,9 @@
 {
 	static unsigned int host_num;
 
-	snprintf(host->host_name, sizeof(host->host_name),
+	snprintf(host->class_dev.class_id, BUS_ID_SIZE,
 		 "mmc%d", host_num++);
 
-	strlcpy(host->class_dev.class_id, host->host_name, BUS_ID_SIZE);
 	return class_device_add(&host->class_dev);
 }