Bluetooth: Remove pointless parameter check in hci_uart_send_frame()

The hdev parameter of hci_uart_send_frame() is always valid. If it
were not valid, then it would have crashed earlier in the call chain.
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NJohan Hedberg <johan.hedberg@intel.com>

drivers/bluetooth/hci_ldisc.c

@@ -236,18 +236,11 @@ static int hci_uart_close(struct hci_dev *hdev)
 /* Send frames from HCI layer */
 static int hci_uart_send_frame(struct hci_dev *hdev, struct sk_buff *skb)
 {
-	struct hci_uart *hu;
-
-	if (!hdev) {
-		BT_ERR("Frame for unknown device (hdev=NULL)");
-		return -ENODEV;
-	}
+	struct hci_uart *hu = hci_get_drvdata(hdev);
 
 	if (!test_bit(HCI_RUNNING, &hdev->flags))
 		return -EBUSY;
 
-	hu = hci_get_drvdata(hdev);
-
 	BT_DBG("%s: type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
 
 	hu->proto->enqueue(hu, skb);