Bluetooth: add NULL pointer check in HCI

If we fail to find a hci device pointer in hci_uart, don't try
to deref the NULL one we do have.

Signed-off-by: Jun Nie <[email protected]>
Signed-off-by: Gustavo F. Padovan <[email protected]>

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 720148294e648473a1a82cc0c68f50ac1fd923c3..3c6cabcb7d84b0428cdeae91b3f9a98f2bc85715 100644 (file)
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -311,8 +311,10 @@ static void hci_uart_tty_close(struct tty_struct *tty)
 
                if (test_and_clear_bit(HCI_UART_PROTO_SET, &hu->flags)) {
                        hu->proto->close(hu);
-                       hci_unregister_dev(hdev);
-                       hci_free_dev(hdev);
+                       if (hdev) {
+                               hci_unregister_dev(hdev);
+                               hci_free_dev(hdev);
+                       }
                }
        }
 }