Bluetooth: hci_uart: Restore hci_dev->flush callback on open()
For reasons explained in detail in commit 3611f4d2a5e0 ("hci_ldisc:
fix null pointer deref") the hci_uart_close() functions sets
hci_dev->flush to NULL.
But the device may be re-opened after a close, this commit restores the
hci_dev->flush callback on open().
Note this commit also moves the nearly empty defition of hci_uart_open()
a bit down in the file to avoid the need for forward declaring
hci_uart_flush().
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
index 954213e..1c49964 100644
--- a/drivers/bluetooth/hci_ldisc.c
+++ b/drivers/bluetooth/hci_ldisc.c
@@ -229,15 +229,6 @@ int hci_uart_init_ready(struct hci_uart *hu)
}
/* ------- Interface to HCI layer ------ */
-/* Initialize device */
-static int hci_uart_open(struct hci_dev *hdev)
-{
- BT_DBG("%s %p", hdev->name, hdev);
-
- /* Nothing to do for UART driver */
- return 0;
-}
-
/* Reset device */
static int hci_uart_flush(struct hci_dev *hdev)
{
@@ -264,6 +255,17 @@ static int hci_uart_flush(struct hci_dev *hdev)
return 0;
}
+/* Initialize device */
+static int hci_uart_open(struct hci_dev *hdev)
+{
+ BT_DBG("%s %p", hdev->name, hdev);
+
+ /* Undo clearing this from hci_uart_close() */
+ hdev->flush = hci_uart_flush;
+
+ return 0;
+}
+
/* Close device */
static int hci_uart_close(struct hci_dev *hdev)
{
diff --git a/drivers/bluetooth/hci_serdev.c b/drivers/bluetooth/hci_serdev.c
index a0e9398..6a713f1 100644
--- a/drivers/bluetooth/hci_serdev.c
+++ b/drivers/bluetooth/hci_serdev.c
@@ -101,14 +101,6 @@ static void hci_uart_write_work(struct work_struct *work)
/* ------- Interface to HCI layer ------ */
-/* Initialize device */
-static int hci_uart_open(struct hci_dev *hdev)
-{
- BT_DBG("%s %p", hdev->name, hdev);
-
- return 0;
-}
-
/* Reset device */
static int hci_uart_flush(struct hci_dev *hdev)
{
@@ -129,6 +121,17 @@ static int hci_uart_flush(struct hci_dev *hdev)
return 0;
}
+/* Initialize device */
+static int hci_uart_open(struct hci_dev *hdev)
+{
+ BT_DBG("%s %p", hdev->name, hdev);
+
+ /* Undo clearing this from hci_uart_close() */
+ hdev->flush = hci_uart_flush;
+
+ return 0;
+}
+
/* Close device */
static int hci_uart_close(struct hci_dev *hdev)
{