Bluetooth: Pause service discovery for suspend

Just like MGMT_OP_START_DISCOVERY, we should reject
MGMT_OP_START_SERVICE_DISCOVERY with MGMT_STATUS_BUSY when we are paused
for suspend.
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/mgmt.c

@@ -4798,6 +4798,14 @@ static int start_service_discovery(struct sock *sk, struct hci_dev *hdev,
 		goto failed;
 	}
 
+	if (hdev->discovery_paused) {
+		err = mgmt_cmd_complete(sk, hdev->id,
+					MGMT_OP_START_SERVICE_DISCOVERY,
+					MGMT_STATUS_BUSY, &cp->type,
+					sizeof(cp->type));
+		goto failed;
+	}
+
 	uuid_count = __le16_to_cpu(cp->uuid_count);
 	if (uuid_count > max_uuid_count) {
 		bt_dev_err(hdev, "service_discovery: too big uuid_count value %u",