staging: r8188eu: change return type of rtw_set_802_11_disassociate to void

Change return type of rtw_set_802_11_disassociate to void. This function
always returns 'true' no matter what, so there is no need to return a
value, and no need to check for it in the two call sites within
rtw_wx_set_mlme. Also, as we are no longer using ret in rtw_wx_set_mlme
except as the return value, just remove it and return 0 directly.
Suggested-by: Michael Straube <straube.linux@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Link: https://lore.kernel.org/r/20221103230632.6946-1-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_ioctl_set.c

@@ -314,7 +314,7 @@ u8 rtw_set_802_11_infrastructure_mode(struct adapter *padapter,
 	return true;
 }
 
-u8 rtw_set_802_11_disassociate(struct adapter *padapter)
+void rtw_set_802_11_disassociate(struct adapter *padapter)
 {
 	struct mlme_priv *pmlmepriv = &padapter->mlmepriv;
 
@@ -328,8 +328,6 @@ u8 rtw_set_802_11_disassociate(struct adapter *padapter)
 	}
 
 	spin_unlock_bh(&pmlmepriv->lock);
-
-	return true;
 }
 
 u8 rtw_set_802_11_bssid_list_scan(struct adapter *padapter, struct ndis_802_11_ssid *pssid, int ssid_max_num)

drivers/staging/r8188eu/include/rtw_ioctl_set.h

@@ -12,7 +12,7 @@ u8 rtw_set_802_11_authentication_mode(struct adapter *adapt,
 				      enum ndis_802_11_auth_mode authmode);
 u8 rtw_set_802_11_bssid(struct adapter *adapter, u8 *bssid);
 u8 rtw_set_802_11_add_wep(struct adapter *adapter, struct ndis_802_11_wep *wep);
-u8 rtw_set_802_11_disassociate(struct adapter *adapter);
+void rtw_set_802_11_disassociate(struct adapter *adapter);
 u8 rtw_set_802_11_bssid_list_scan(struct adapter *adapter,
 				  struct ndis_802_11_ssid *pssid,
 				  int ssid_max_num);

drivers/staging/r8188eu/os_dep/ioctl_linux.c

@@ -1011,7 +1011,6 @@ static int rtw_wx_set_mlme(struct net_device *dev,
 			     struct iw_request_info *info,
 			     union iwreq_data *wrqu, char *extra)
 {
-	int ret = 0;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
 	struct iw_mlme *mlme = (struct iw_mlme *)extra;
 
@@ -1020,17 +1019,15 @@ static int rtw_wx_set_mlme(struct net_device *dev,
 
 	switch (mlme->cmd) {
 	case IW_MLME_DEAUTH:
-		if (!rtw_set_802_11_disassociate(padapter))
-			ret = -1;
+		rtw_set_802_11_disassociate(padapter);
 		break;
 	case IW_MLME_DISASSOC:
-		if (!rtw_set_802_11_disassociate(padapter))
-			ret = -1;
+		rtw_set_802_11_disassociate(padapter);
 		break;
 	default:
 		return -EOPNOTSUPP;
 	}
-	return ret;
+	return 0;
 }
 
 static int rtw_wx_set_scan(struct net_device *dev, struct iw_request_info *a,