diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 78f0f85bebdc25ef971405175feb621865f4cad1..5535377f540eced25ba6c26ea1c432a4abb57a11 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -877,9 +877,6 @@ static int get_serial_info(struct acm *acm, struct serial_struct __user *info)
 {
 	struct serial_struct tmp;
 
-	if (!info)
-		return -EINVAL;
-
 	memset(&tmp, 0, sizeof(tmp));
 	tmp.flags = ASYNC_LOW_LATENCY;
 	tmp.xmit_fifo_size = acm->writesize;