diff --git a/[refs] b/[refs]
index 302e57f3794c..1b6a8315d4ea 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 03f0dbf74c7a117c270e63d62d5e4927af6f295b
+refs/heads/master: d76f2f4462bbb2cf7bc83a35c5278177aa627e89
diff --git a/trunk/drivers/usb/serial/io_edgeport.c b/trunk/drivers/usb/serial/io_edgeport.c
index b4bd6847a96d..bfa508ddb0fe 100644
--- a/trunk/drivers/usb/serial/io_edgeport.c
+++ b/trunk/drivers/usb/serial/io_edgeport.c
@@ -1404,15 +1404,15 @@ static int edge_write_room(struct tty_struct *tty)
 	dbg("%s", __func__);
 
 	if (edge_port == NULL)
-		return -ENODEV;
+		return 0;
 	if (edge_port->closePending)
-		return -ENODEV;
+		return 0;
 
 	dbg("%s - port %d", __func__, port->number);
 
 	if (!edge_port->open) {
 		dbg("%s - port not opened", __func__);
-		return -EINVAL;
+		return 0;
 	}
 
 	/* total of both buffers is still txCredit */
@@ -1444,13 +1444,13 @@ static int edge_chars_in_buffer(struct tty_struct *tty)
 	dbg("%s", __func__);
 
 	if (edge_port == NULL)
-		return -ENODEV;
+		return 0;
 	if (edge_port->closePending)
-		return -ENODEV;
+		return 0;
 
 	if (!edge_port->open) {
 		dbg("%s - port not opened", __func__);
-		return -EINVAL;
+		return 0;
 	}
 
 	spin_lock_irqsave(&edge_port->ep_lock, flags);