Bluetooth: Add convenience function to check for pending power off

There are several situations where we're interested in knowing whether
we're currently in the process of powering off an adapter. This patch
adds a convenience function for the purpose and makes it public since
we'll soon need to access it from hci_event.c as well.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci_core.h

@@ -1351,6 +1351,7 @@ void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 		      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
+bool mgmt_powering_down(struct hci_dev *hdev);
 void mgmt_new_ltk(struct hci_dev *hdev, struct smp_ltk *key, bool persistent);
 void mgmt_new_irk(struct hci_dev *hdev, struct smp_irk *irk);
 void mgmt_new_csrk(struct hci_dev *hdev, struct smp_csrk *csrk,

net/bluetooth/mgmt.c

@@ -6281,26 +6281,36 @@ static void unpair_device_rsp(struct pending_cmd *cmd, void *data)
 	mgmt_pending_remove(cmd);
 }
 
+bool mgmt_powering_down(struct hci_dev *hdev)
+{
+	struct pending_cmd *cmd;
+	struct mgmt_mode *cp;
+
+	cmd = mgmt_pending_find(MGMT_OP_SET_POWERED, hdev);
+	if (!cmd)
+		return false;
+
+	cp = cmd->param;
+	if (!cp->val)
+		return true;
+
+	return false;
+}
+
 void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
 			      u8 link_type, u8 addr_type, u8 reason,
 			      bool mgmt_connected)
 {
 	struct mgmt_ev_device_disconnected ev;
-	struct pending_cmd *power_off;
 	struct sock *sk = NULL;
 
-	power_off = mgmt_pending_find(MGMT_OP_SET_POWERED, hdev);
-	if (power_off) {
-		struct mgmt_mode *cp = power_off->param;
-
 	/* The connection is still in hci_conn_hash so test for 1
 	 * instead of 0 to know if this is the last one.
 	 */
-		if (!cp->val && hci_conn_count(hdev) == 1) {
+	if (mgmt_powering_down(hdev) && hci_conn_count(hdev) == 1) {
 		cancel_delayed_work(&hdev->power_off);
 		queue_work(hdev->req_workqueue, &hdev->power_off.work);
 	}
-	}
 
 	if (!mgmt_connected)
 		return;
@@ -6359,20 +6369,14 @@ void mgmt_connect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 			 u8 addr_type, u8 status)
 {
 	struct mgmt_ev_connect_failed ev;
-	struct pending_cmd *power_off;
-
-	power_off = mgmt_pending_find(MGMT_OP_SET_POWERED, hdev);
-	if (power_off) {
-		struct mgmt_mode *cp = power_off->param;
 
 	/* The connection is still in hci_conn_hash so test for 1
 	 * instead of 0 to know if this is the last one.
 	 */
-		if (!cp->val && hci_conn_count(hdev) == 1) {
+	if (mgmt_powering_down(hdev) && hci_conn_count(hdev) == 1) {
 		cancel_delayed_work(&hdev->power_off);
 		queue_work(hdev->req_workqueue, &hdev->power_off.work);
 	}
-	}
 
 	bacpy(&ev.addr.bdaddr, bdaddr);
 	ev.addr.type = link_to_bdaddr(link_type, addr_type);