Bluetooth: hci_uart: check for missing tty operations

[linux-2.6-microblaze.git] / drivers / bluetooth / hci_ldisc.c

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 8950e07..85a30fb 100644 (file)
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -292,6 +292,19 @@ static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
        return 0;
 }
 
+/* Check the underlying device or tty has flow control support */
+bool hci_uart_has_flow_control(struct hci_uart *hu)
+{
+       /* serdev nodes check if the needed operations are present */
+       if (hu->serdev)
+               return true;
+
+       if (hu->tty->driver->ops->tiocmget && hu->tty->driver->ops->tiocmset)
+               return true;
+
+       return false;
+}
+
 /* Flow control or un-flow control the device */
 void hci_uart_set_flow_control(struct hci_uart *hu, bool enable)
 {