Bluetooth: Remove HCI-owner field

After unregistering an hci_dev object a bluetooth driver does not have
any callbacks in the hci_dev structure left over. Therefore, there is no
need to keep a reference to the module.

Previously, we needed this to protect the hci-destruct callback.
However, this callback is no longer available so we do not need this
owner field, anymore.  Drivers now call hci_unregister_dev() and they
are done with the object.

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>

drivers/bluetooth/bfusb.c

@@ -705,8 +705,6 @@ static int bfusb_probe(struct usb_interface *intf, const struct usb_device_id *i
 	hdev->send     = bfusb_send_frame;
 	hdev->ioctl    = bfusb_ioctl;
 
-	hdev->owner = THIS_MODULE;
-
 	if (hci_register_dev(hdev) < 0) {
 		BT_ERR("Can't register HCI device");
 		hci_free_dev(hdev);

drivers/bluetooth/bluecard_cs.c

@@ -738,8 +738,6 @@ static int bluecard_open(bluecard_info_t *info)
 	hdev->send     = bluecard_hci_send_frame;
 	hdev->ioctl    = bluecard_hci_ioctl;
 
-	hdev->owner = THIS_MODULE;
-
 	id = inb(iobase + 0x30);
 
 	if ((id & 0x0f) == 0x02)

drivers/bluetooth/bpa10x.c

@@ -470,8 +470,6 @@ static int bpa10x_probe(struct usb_interface *intf, const struct usb_device_id *
 	hdev->flush    = bpa10x_flush;
 	hdev->send     = bpa10x_send_frame;
 
-	hdev->owner = THIS_MODULE;
-
 	set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
 
 	err = hci_register_dev(hdev);

drivers/bluetooth/bt3c_cs.c

@@ -584,8 +584,6 @@ static int bt3c_open(bt3c_info_t *info)
 	hdev->send     = bt3c_hci_send_frame;
 	hdev->ioctl    = bt3c_hci_ioctl;
 
-	hdev->owner = THIS_MODULE;
-
 	/* Load firmware */
 	err = request_firmware(&firmware, "BT3CPCC.bin", &info->p_dev->dev);
 	if (err < 0) {

drivers/bluetooth/btmrvl_main.c

@@ -550,7 +550,6 @@ int btmrvl_register_hdev(struct btmrvl_private *priv)
 	hdev->flush = btmrvl_flush;
 	hdev->send = btmrvl_send_frame;
 	hdev->ioctl = btmrvl_ioctl;
-	hdev->owner = THIS_MODULE;
 
 	btmrvl_send_module_cfg_cmd(priv, MODULE_BRINGUP_REQ);
 

drivers/bluetooth/btsdio.c

@@ -337,8 +337,6 @@ static int btsdio_probe(struct sdio_func *func,
 	hdev->flush    = btsdio_flush;
 	hdev->send     = btsdio_send_frame;
 
-	hdev->owner = THIS_MODULE;
-
 	err = hci_register_dev(hdev);
 	if (err < 0) {
 		hci_free_dev(hdev);

drivers/bluetooth/btuart_cs.c

@@ -502,8 +502,6 @@ static int btuart_open(btuart_info_t *info)
 	hdev->send     = btuart_hci_send_frame;
 	hdev->ioctl    = btuart_hci_ioctl;
 
-	hdev->owner = THIS_MODULE;
-
 	spin_lock_irqsave(&(info->lock), flags);
 
 	/* Reset UART */

drivers/bluetooth/btusb.c

@@ -997,8 +997,6 @@ static int btusb_probe(struct usb_interface *intf,
 	hdev->send     = btusb_send_frame;
 	hdev->notify   = btusb_notify;
 
-	hdev->owner = THIS_MODULE;
-
 	/* Interface numbers are hardcoded in the specification */
 	data->isoc = usb_ifnum_to_if(data->udev, 1);
 

drivers/bluetooth/btwilink.c

@@ -317,7 +317,6 @@ static int bt_ti_probe(struct platform_device *pdev)
 	hdev->close = ti_st_close;
 	hdev->flush = NULL;
 	hdev->send = ti_st_send_frame;
-	hdev->owner = THIS_MODULE;
 
 	err = hci_register_dev(hdev);
 	if (err < 0) {

drivers/bluetooth/dtl1_cs.c

@@ -484,8 +484,6 @@ static int dtl1_open(dtl1_info_t *info)
 	hdev->send     = dtl1_hci_send_frame;
 	hdev->ioctl    = dtl1_hci_ioctl;
 
-	hdev->owner = THIS_MODULE;
-
 	spin_lock_irqsave(&(info->lock), flags);
 
 	/* Reset UART */

drivers/bluetooth/hci_ldisc.c

@@ -392,8 +392,6 @@ static int hci_uart_register_dev(struct hci_uart *hu)
 	hdev->send  = hci_uart_send_frame;
 	hdev->parent = hu->tty->dev;
 
-	hdev->owner = THIS_MODULE;
-
 	if (!reset)
 		set_bit(HCI_QUIRK_NO_RESET, &hdev->quirks);
 

drivers/bluetooth/hci_vhci.c

@@ -244,8 +244,6 @@ static int vhci_open(struct inode *inode, struct file *file)
 	hdev->flush    = vhci_flush;
 	hdev->send     = vhci_send_frame;
 
-	hdev->owner = THIS_MODULE;
-
 	if (hci_register_dev(hdev) < 0) {
 		BT_ERR("Can't register HCI device");
 		kfree(data);

include/net/bluetooth/hci_core.h

@@ -262,8 +262,6 @@ struct hci_dev {
 
 	struct rfkill		*rfkill;
 
-	struct module		*owner;
-
 	unsigned long		dev_flags;
 
 	int (*open)(struct hci_dev *hdev);
@@ -601,11 +599,7 @@ static inline void __hci_dev_put(struct hci_dev *d)
  * hci_dev_put and hci_dev_hold are macros to avoid dragging all the
  * overhead of all the modular infrastructure into this header.
  */
-#define hci_dev_put(d)		\
-do {				\
-	__hci_dev_put(d);	\
-	module_put(d->owner);	\
-} while (0)
+#define hci_dev_put(d) __hci_dev_put(d)
 
 static inline struct hci_dev *__hci_dev_hold(struct hci_dev *d)
 {
@@ -613,10 +607,7 @@ static inline struct hci_dev *__hci_dev_hold(struct hci_dev *d)
 	return d;
 }
 
-#define hci_dev_hold(d)						\
-({								\
-	try_module_get(d->owner) ? __hci_dev_hold(d) : NULL;	\
-})
+#define hci_dev_hold(d) __hci_dev_hold(d)
 
 #define hci_dev_lock(d)		mutex_lock(&d->lock)
 #define hci_dev_unlock(d)	mutex_unlock(&d->lock)

net/bluetooth/hci_core.c

@@ -1548,8 +1548,7 @@ int hci_register_dev(struct hci_dev *hdev)
 	struct list_head *head = &hci_dev_list, *p;
 	int i, id, error;
 
-	BT_DBG("%p name %s bus %d owner %p", hdev, hdev->name,
-						hdev->bus, hdev->owner);
+	BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
 
 	if (!hdev->open || !hdev->close)
 		return -EINVAL;