Bluetooth: Add clarifying comment to command status handling

When dealing with HCI command status events, the reasoning for trying to
mark a request as complete if no specific event is being waited for and
status was success is not self-evident. This patch adds a clarifying
comment above the if-statement.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_event.c

@@ -3124,6 +3124,12 @@ static void hci_cmd_status_evt(struct hci_dev *hdev, struct sk_buff *skb)
 	if (ev->ncmd && !test_bit(HCI_RESET, &hdev->flags))
 		atomic_set(&hdev->cmd_cnt, 1);
 
+	/* Indicate request completion if the command failed. Also, if
+	 * we're not waiting for a special event and we get a success
+	 * command status we should try to flag the request as completed
+	 * (since for this kind of commands there will not be a command
+	 * complete event).
+	 */
 	if (ev->status ||
 	    (hdev->sent_cmd && !bt_cb(hdev->sent_cmd)->req.event))
 		hci_req_cmd_complete(hdev, opcode, ev->status);