From: David Herrmann <dh.herrmann@googlemail.com>
Date: Sat, 7 Jan 2012 14:47:19 +0000 (+0100)
Subject: Bluetooth: uart-ldisc: Fix memory leak and remove destruct cb
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=797fe796c4335b35d95d5326824513befdb5d1e9;p=linux-beck.git

Bluetooth: uart-ldisc: Fix memory leak and remove destruct cb

We currently leak the hci_uart object if HCI_UART_PROTO_SET is never set
because the hci-destruct callback will then never be called.  This fix
removes the hci-destruct callback and frees the driver internal private
hci_uart object directly on tty-close. We call hci_unregister_dev() here
so the hci-core will never call our callbacks again (except destruct).
Therefore, we can safely free the driver internal data right away and
set the destruct callback to NULL.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
---

diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 48ad2a7ab080..5ea49df3462b 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -231,15 +231,6 @@ static int hci_uart_send_frame(struct sk_buff *skb)
 	return 0;
 }
 
-static void hci_uart_destruct(struct hci_dev *hdev)
-{
-	if (!hdev)
-		return;
-
-	BT_DBG("%s", hdev->name);
-	kfree(hdev->driver_data);
-}
-
 /* ------ LDISC part ------ */
 /* hci_uart_tty_open
  * 
@@ -316,6 +307,8 @@ static void hci_uart_tty_close(struct tty_struct *tty)
 				hci_free_dev(hdev);
 			}
 		}
+
+		kfree(hu);
 	}
 }
 
@@ -397,7 +390,6 @@ static int hci_uart_register_dev(struct hci_uart *hu)
 	hdev->close = hci_uart_close;
 	hdev->flush = hci_uart_flush;
 	hdev->send  = hci_uart_send_frame;
-	hdev->destruct = hci_uart_destruct;
 	hdev->parent = hu->tty->dev;
 
 	hdev->owner = THIS_MODULE;