Bluetooth: mgmt: Remove unneeded variable

Return value from mgmt_cmd_complete() directly instead
of taking this in another redundant variable.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: CGEL ZTE <cgel.zte@gmail.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

net/bluetooth/mgmt.c

@@ -8630,7 +8630,6 @@ static int get_adv_size_info(struct sock *sk, struct hci_dev *hdev,
 	struct mgmt_cp_get_adv_size_info *cp = data;
 	struct mgmt_rp_get_adv_size_info rp;
 	u32 flags, supported_flags;
-	int err;
 
 	bt_dev_dbg(hdev, "sock %p", sk);
 
@@ -8657,10 +8656,8 @@ static int get_adv_size_info(struct sock *sk, struct hci_dev *hdev,
 	rp.max_adv_data_len = tlv_data_max_len(hdev, flags, true);
 	rp.max_scan_rsp_len = tlv_data_max_len(hdev, flags, false);
 
-	err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_ADV_SIZE_INFO,
 				 MGMT_STATUS_SUCCESS, &rp, sizeof(rp));
-
-	return err;
 }
 
 static const struct hci_mgmt_handler mgmt_handlers[] = {