diff --git a/[refs] b/[refs]
index c9ceb0447f07..a259599f0b38 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: af2ac1a091bc8bee73d7837b73ebfb00b917aece
+refs/heads/master: a91b0c502285fd0c569fae1222fdd945ef739233
diff --git a/trunk/drivers/usb/class/cdc-acm.c b/trunk/drivers/usb/class/cdc-acm.c
index 34d4eb98829e..ef2e6f9c8906 100644
--- a/trunk/drivers/usb/class/cdc-acm.c
+++ b/trunk/drivers/usb/class/cdc-acm.c
@@ -1460,6 +1460,23 @@ static int acm_resume(struct usb_interface *intf)
 	return rv;
 }
 
+static int acm_reset_resume(struct usb_interface *intf)
+{
+	struct acm *acm = usb_get_intfdata(intf);
+	struct tty_struct *tty;
+
+	mutex_lock(&acm->mutex);
+	if (acm->port.count) {
+		tty = tty_port_tty_get(&acm->port);
+		if (tty) {
+			tty_hangup(tty);
+			tty_kref_put(tty);
+		}
+	}
+	mutex_unlock(&acm->mutex);
+	return acm_resume(intf);
+}
+
 #endif /* CONFIG_PM */
 
 #define NOKIA_PCSUITE_ACM_INFO(x) \
@@ -1602,6 +1619,7 @@ static struct usb_driver acm_driver = {
 #ifdef CONFIG_PM
 	.suspend =	acm_suspend,
 	.resume =	acm_resume,
+	.reset_resume =	acm_reset_resume,
 #endif
 	.id_table =	acm_ids,
 #ifdef CONFIG_PM