Bluetooth: Add hdev_init callback for HCI channels

In order to make the mgmt command handling more generic we can't have a
direct call to mgmt_init_hdev() from mgmt_control(). This patch adds a
new callback to struct hci_mgmt_chan. And sets it to point to the
mgmt_init_hdev() function for the HCI_CHANNEL_CONTROL instance.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci_core.h

@@ -1305,6 +1305,7 @@ struct hci_mgmt_chan {
 	unsigned short channel;
 	size_t handler_count;
 	const struct hci_mgmt_handler *handlers;
+	void (*hdev_init) (struct sock *sk, struct hci_dev *hdev);
 };
 
 int hci_mgmt_chan_register(struct hci_mgmt_chan *c);

net/bluetooth/mgmt.c

@@ -6493,8 +6493,8 @@ int mgmt_control(struct hci_mgmt_chan *chan, struct sock *sk,
 		goto done;
 	}
 
-	if (hdev)
-		mgmt_init_hdev(sk, hdev);
+	if (hdev && chan->hdev_init)
+		chan->hdev_init(sk, hdev);
 
 	cp = buf + sizeof(*hdr);
 
@@ -7706,6 +7706,7 @@ static struct hci_mgmt_chan chan = {
 	.channel	= HCI_CHANNEL_CONTROL,
 	.handler_count	= ARRAY_SIZE(mgmt_handlers),
 	.handlers	= mgmt_handlers,
+	.hdev_init	= mgmt_init_hdev,
 };
 
 int mgmt_init(void)