Bluetooth: Implement disable and removal of adv instance

If ext adv is enabled then use ext adv to disable as well.
Also remove the adv set during LE disable.

< HCI Command: LE Set Extended Advertising Enable (0x08|0x0039) plen 2
        Extended advertising: Disabled (0x00)
        Number of sets: Disable all sets (0x00)
> HCI Event: Command Complete (0x0e) plen 4
      LE Set Extended Advertising Enable (0x08|0x0039) ncmd 2
        Status: Success (0x00)
Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci.h

@@ -1647,6 +1647,8 @@ struct hci_cp_le_set_ext_scan_rsp_data {
 
 #define LE_SET_ADV_DATA_NO_FRAG		0x01
 
+#define HCI_OP_LE_CLEAR_ADV_SETS	0x203d
+
 /* ---- HCI Events ---- */
 #define HCI_EV_INQUIRY_COMPLETE		0x01
 

net/bluetooth/hci_event.c

@@ -1129,6 +1129,8 @@ static void hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev,
 			queue_delayed_work(hdev->workqueue,
 					   &conn->le_conn_timeout,
 					   conn->conn_timeout);
+	} else {
+		hci_dev_clear_flag(hdev, HCI_LE_ADV);
 	}
 
 	hci_dev_unlock(hdev);

net/bluetooth/hci_request.c

@@ -934,9 +934,19 @@ static u8 get_cur_adv_instance_scan_rsp_len(struct hci_dev *hdev)
 
 void __hci_req_disable_advertising(struct hci_request *req)
 {
+	if (ext_adv_capable(req->hdev)) {
+		struct hci_cp_le_set_ext_adv_enable cp;
+
+		cp.enable = 0x00;
+		/* Disable all sets since we only support one set at the moment */
+		cp.num_of_sets = 0x00;
+
+		hci_req_add(req, HCI_OP_LE_SET_EXT_ADV_ENABLE, sizeof(cp), &cp);
+	} else {
 		u8 enable = 0x00;
 
 		hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
+	}
 }
 
 static u32 get_adv_instance_flags(struct hci_dev *hdev, u8 instance)
@@ -1430,6 +1440,11 @@ static void adv_timeout_expire(struct work_struct *work)
 	hci_dev_unlock(hdev);
 }
 
+void __hci_req_clear_ext_adv_sets(struct hci_request *req)
+{
+	hci_req_add(req, HCI_OP_LE_CLEAR_ADV_SETS, 0, NULL);
+}
+
 int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance)
 {
 	struct hci_cp_le_set_ext_adv_params cp;
@@ -1499,8 +1514,12 @@ void __hci_req_enable_ext_advertising(struct hci_request *req)
 
 int __hci_req_start_ext_adv(struct hci_request *req, u8 instance)
 {
+	struct hci_dev *hdev = req->hdev;
 	int err;
 
+	if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+		__hci_req_disable_advertising(req);
+
 	err = __hci_req_setup_ext_adv_instance(req, instance);
 	if (err < 0)
 		return err;

net/bluetooth/hci_request.h

@@ -83,6 +83,7 @@ void hci_req_clear_adv_instance(struct hci_dev *hdev, struct sock *sk,
 int __hci_req_setup_ext_adv_instance(struct hci_request *req, u8 instance);
 int __hci_req_start_ext_adv(struct hci_request *req, u8 instance);
 void __hci_req_enable_ext_advertising(struct hci_request *req);
+void __hci_req_clear_ext_adv_sets(struct hci_request *req);
 
 void __hci_req_update_class(struct hci_request *req);
 

net/bluetooth/mgmt.c

@@ -1956,6 +1956,9 @@ static int set_le(struct sock *sk, struct hci_dev *hdev, void *data, u16 len)
 	} else {
 		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
 			__hci_req_disable_advertising(&req);
+
+		if (ext_adv_capable(hdev))
+			__hci_req_clear_ext_adv_sets(&req);
 	}
 
 	hci_req_add(&req, HCI_OP_WRITE_LE_HOST_SUPPORTED, sizeof(hci_cp),