Bluetooth: Remove hci_dev->driver_data

The linux device model provides dev_set/get_drvdata so we can use this
to save private driver data.
This also removes several unnecessary casts.

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/bfusb.c b/drivers/bluetooth/bfusb.c
index c7d6ff0..b8ac1c5 100644
--- a/drivers/bluetooth/bfusb.c
+++ b/drivers/bluetooth/bfusb.c
@@ -411,7 +411,7 @@
 
 static int bfusb_open(struct hci_dev *hdev)
 {
-	struct bfusb_data *data = hdev->driver_data;
+	struct bfusb_data *data = hci_get_drvdata(hdev);
 	unsigned long flags;
 	int i, err;
 
@@ -437,7 +437,7 @@
 
 static int bfusb_flush(struct hci_dev *hdev)
 {
-	struct bfusb_data *data = hdev->driver_data;
+	struct bfusb_data *data = hci_get_drvdata(hdev);
 
 	BT_DBG("hdev %p bfusb %p", hdev, data);
 
@@ -448,7 +448,7 @@
 
 static int bfusb_close(struct hci_dev *hdev)
 {
-	struct bfusb_data *data = hdev->driver_data;
+	struct bfusb_data *data = hci_get_drvdata(hdev);
 	unsigned long flags;
 
 	BT_DBG("hdev %p bfusb %p", hdev, data);
@@ -483,7 +483,7 @@
 	if (!test_bit(HCI_RUNNING, &hdev->flags))
 		return -EBUSY;
 
-	data = hdev->driver_data;
+	data = hci_get_drvdata(hdev);
 
 	switch (bt_cb(skb)->pkt_type) {
 	case HCI_COMMAND_PKT:
@@ -696,7 +696,7 @@
 	data->hdev = hdev;
 
 	hdev->bus = HCI_USB;
-	hdev->driver_data = data;
+	hci_set_drvdata(hdev, data);
 	SET_HCIDEV_DEV(hdev, &intf->dev);
 
 	hdev->open     = bfusb_open;