From: Jun Nie <njun@marvell.com>
Date: Tue, 7 Dec 2010 06:03:38 +0000 (+0800)
Subject: Bluetooth: add NULL pointer check in HCI
X-Git-Tag: firefly_0821_release~7613^2~3176^2~7^2~8^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d9319560b86839506c2011346b1f2e61438a3c73;p=firefly-linux-kernel-4.4.55.git

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 <njun@marvell.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
---

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 720148294e64..3c6cabcb7d84 100644
--- 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);
+			}
 		}
 	}
 }