staging: rtl8192e: Remove unsupported mode IW_MODE_MASTER

Tasklet irq_rx_tasklet is scheduled when hw is receiving frames. Function
_rtl92e_irq_rx_tasklet() is then called which calls then
_rtl92e_rx_normal(). In _rtl92e_rx_normal() all frames are processed by
rtllib_rx(). When ieee->iw_mode is IW_MODE_MASTER the function returns
0. The calling function then calls: dev_kfree_skb_any() which clears the
skb. So the driver clears all packets received in this mode. Remove dead
code in mode IW_MODE_MASTER.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/9cd4574e4cfe0a2d7afce03c9b868757e215a23c.1691908402.git.philipp.g.hortmann@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Philipp Hortmann

drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c

@@ -59,10 +59,6 @@ static void _rtl92e_update_msr(struct net_device *dev)
 		if (priv->rtllib->link_state == MAC80211_LINKED)
 			msr |= MSR_LINK_ADHOC;
 		break;
-	case IW_MODE_MASTER:
-		if (priv->rtllib->link_state == MAC80211_LINKED)
-			msr |= MSR_LINK_MASTER;
-		break;
 	default:
 		break;
 	}

drivers/staging/rtl8192e/rtl8192e/rtl_ps.c

@@ -118,8 +118,7 @@ void rtl92e_ips_enter(struct net_device *dev)
 
 	rt_state = priv->rtllib->rf_power_state;
 	if (rt_state == rf_on && !psc->bSwRfProcessing &&
-		(priv->rtllib->link_state != MAC80211_LINKED) &&
-		(priv->rtllib->iw_mode != IW_MODE_MASTER)) {
+		(priv->rtllib->link_state != MAC80211_LINKED)) {
 		psc->eInactivePowerState = rf_off;
 		_rtl92e_ps_update_rf_state(dev);
 	}
@@ -210,8 +209,7 @@ void rtl92e_leisure_ps_enter(struct net_device *dev)
 
 	if (!((priv->rtllib->iw_mode == IW_MODE_INFRA) &&
 	    (priv->rtllib->link_state == MAC80211_LINKED))
-	    || (priv->rtllib->iw_mode == IW_MODE_ADHOC) ||
-	    (priv->rtllib->iw_mode == IW_MODE_MASTER))
+	    || (priv->rtllib->iw_mode == IW_MODE_ADHOC))
 		return;
 
 	if (psc->bLeisurePs) {

drivers/staging/rtl8192e/rtl819x_HTProc.c

@@ -363,8 +363,7 @@ void HTConstructInfoElement(struct rtllib_device *ieee, u8 *posHTInfo,
 	}
 
 	memset(posHTInfo, 0, *len);
-	if ((ieee->iw_mode == IW_MODE_ADHOC) ||
-	    (ieee->iw_mode == IW_MODE_MASTER)) {
+	if (ieee->iw_mode == IW_MODE_ADHOC) {
 		pHTInfoEle->ControlChl	= ieee->current_network.channel;
 		pHTInfoEle->ExtChlOffset = ((!pHT->bRegBW40MHz) ?
 					    HT_EXTCHNL_OFFSET_NO_EXT :

drivers/staging/rtl8192e/rtl819x_TSProc.c

@@ -182,15 +182,7 @@ static struct ts_common_info *SearchAdmitTRStream(struct rtllib_device *ieee,
 	struct list_head *psearch_list;
 	struct ts_common_info *pRet = NULL;
 
-	if (ieee->iw_mode == IW_MODE_MASTER) {
-		if (TxRxSelect == TX_DIR) {
-			search_dir[DIR_DOWN] = true;
-			search_dir[DIR_BI_DIR] = true;
-		} else {
-			search_dir[DIR_UP] = true;
-			search_dir[DIR_BI_DIR] = true;
-		}
-	} else if (ieee->iw_mode == IW_MODE_ADHOC) {
+	if (ieee->iw_mode == IW_MODE_ADHOC) {
 		if (TxRxSelect == TX_DIR)
 			search_dir[DIR_UP] = true;
 		else
@@ -311,9 +303,7 @@ bool GetTs(struct rtllib_device *ieee, struct ts_common_info **ppTS,
 				(&ieee->Tx_TS_Admit_List) :
 				(&ieee->Rx_TS_Admit_List);
 
-	Dir = (ieee->iw_mode == IW_MODE_MASTER) ?
-				((TxRxSelect == TX_DIR) ? DIR_DOWN : DIR_UP) :
-				((TxRxSelect == TX_DIR) ? DIR_UP : DIR_DOWN);
+	Dir = ((TxRxSelect == TX_DIR) ? DIR_UP : DIR_DOWN);
 
 	if (!list_empty(pUnusedList)) {
 		(*ppTS) = list_entry(pUnusedList->next,

drivers/staging/rtl8192e/rtllib_rx.c

@@ -1496,7 +1496,6 @@ int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,
 	case IW_MODE_INFRA:
 		ret = rtllib_rx_InfraAdhoc(ieee, skb, rx_stats);
 		break;
-	case IW_MODE_MASTER:
 	case IW_MODE_REPEAT:
 		break;
 	case IW_MODE_MONITOR:
@@ -2682,8 +2681,7 @@ static void rtllib_rx_mgt(struct rtllib_device *ieee,
 		netdev_dbg(ieee->dev, "received PROBE REQUEST (%d)\n",
 			   WLAN_FC_GET_STYPE(le16_to_cpu(header->frame_ctl)));
 		if ((ieee->softmac_features & IEEE_SOFTMAC_PROBERS) &&
-		    ((ieee->iw_mode == IW_MODE_ADHOC ||
-		    ieee->iw_mode == IW_MODE_MASTER) &&
+		    (ieee->iw_mode == IW_MODE_ADHOC &&
 		    ieee->link_state == MAC80211_LINKED))
 			rtllib_rx_probe_rq(ieee, skb);
 		break;

drivers/staging/rtl8192e/rtllib_softmac.c

@@ -935,8 +935,7 @@ static struct sk_buff *rtllib_assoc_resp(struct rtllib_device *ieee, u8 *dest)
 	ether_addr_copy(assoc->header.addr1, dest);
 	ether_addr_copy(assoc->header.addr3, ieee->dev->dev_addr);
 	ether_addr_copy(assoc->header.addr2, ieee->dev->dev_addr);
-	assoc->capability = cpu_to_le16(ieee->iw_mode == IW_MODE_MASTER ?
-		WLAN_CAPABILITY_ESS : WLAN_CAPABILITY_IBSS);
+	assoc->capability = cpu_to_le16(WLAN_CAPABILITY_IBSS);
 
 	assoc->capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_SLOT_TIME);
 
@@ -2248,8 +2247,6 @@ rtllib_rx_auth(struct rtllib_device *ieee, struct sk_buff *skb,
 			netdev_dbg(ieee->dev,
 				   "Received authentication response");
 			rtllib_rx_auth_resp(ieee, skb);
-		} else if (ieee->iw_mode == IW_MODE_MASTER) {
-			rtllib_rx_auth_rq(ieee, skb);
 		}
 	}
 	return 0;
@@ -2309,9 +2306,6 @@ inline int rtllib_rx_frame_softmac(struct rtllib_device *ieee,
 		break;
 	case RTLLIB_STYPE_ASSOC_REQ:
 	case RTLLIB_STYPE_REASSOC_REQ:
-		if ((ieee->softmac_features & IEEE_SOFTMAC_ASSOCIATE) &&
-		     ieee->iw_mode == IW_MODE_MASTER)
-			rtllib_rx_assoc_rq(ieee, skb);
 		break;
 	case RTLLIB_STYPE_AUTH:
 		rtllib_rx_auth(ieee, skb, rx_stats);
@@ -2807,9 +2801,6 @@ void rtllib_start_protocol(struct rtllib_device *ieee)
 	case IW_MODE_ADHOC:
 		rtllib_start_ibss(ieee);
 		break;
-	case IW_MODE_MASTER:
-		rtllib_start_master_bss(ieee);
-		break;
 	case IW_MODE_MONITOR:
 		rtllib_start_monitor_mode(ieee);
 		break;

drivers/staging/rtl8192e/rtllib_softmac_wx.c

@@ -51,8 +51,7 @@ int rtllib_wx_set_freq(struct rtllib_device *ieee, struct iw_request_info *a,
 		ieee->current_network.channel = fwrq->m;
 		ieee->set_chan(ieee->dev, ieee->current_network.channel);
 
-		if (ieee->iw_mode == IW_MODE_ADHOC ||
-		    ieee->iw_mode == IW_MODE_MASTER)
+		if (ieee->iw_mode == IW_MODE_ADHOC)
 			if (ieee->link_state == MAC80211_LINKED) {
 				rtllib_stop_send_beacons(ieee);
 				rtllib_start_send_beacons(ieee);
@@ -125,10 +124,6 @@ int rtllib_wx_set_wap(struct rtllib_device *ieee,
 
 	mutex_lock(&ieee->wx_mutex);
 	/* use ifconfig hw ether */
-	if (ieee->iw_mode == IW_MODE_MASTER) {
-		ret = -1;
-		goto out;
-	}
 
 	if (temp->sa_family != ARPHRD_ETHER) {
 		ret = -EINVAL;
@@ -366,7 +361,7 @@ void rtllib_wx_sync_scan_wq(void *data)
 		ieee->link_detect_info.NumRecvBcnInPeriod = 1;
 		ieee->link_detect_info.NumRecvDataInPeriod = 1;
 	}
-	if (ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
+	if (ieee->iw_mode == IW_MODE_ADHOC)
 		rtllib_start_send_beacons(ieee);
 
 	rtllib_wake_all_queues(ieee);

drivers/staging/rtl8192e/rtllib_tx.c

@@ -463,8 +463,6 @@ static void rtllib_query_protectionmode(struct rtllib_device *ieee,
 	}
 	if (ieee->current_network.capability & WLAN_CAPABILITY_SHORT_PREAMBLE)
 		tcb_desc->bUseShortPreamble = true;
-	if (ieee->iw_mode == IW_MODE_MASTER)
-		goto NO_PROTECTION;
 	return;
 NO_PROTECTION:
 	tcb_desc->bRTSEnable	= false;