[PATCH] staging: rtl8723bs: remove unused network_type_in_use field

[Cong Nguyen]

The network_type_in_use member of struct wlan_bssid_ex is write-only:
nothing in the driver ever reads it. It is assigned in three places,
none of which feed anything:

  - collect_bss_info() hard-codes it to Ndis802_11OFDM24 for every
    parsed beacon/probe response, regardless of the network's actual
    band or rates (it is even wrong for 5 GHz APs, which the same
    function explicitly handles).
  - rtw_check_beacon_data() and rtw_update_registrypriv_dev_network()
    derive it from the wireless mode via a switch, but the result is
    likewise never consumed.

The live PHY classification the driver actually acts on is kept in
wlan_network.network_type (the WIRELESS_11x value), so this NDIS-era
field is redundant.

struct wlan_bssid_ex is an internal structure passed by pointer through
the driver command queue; it is never serialized to firmware or onto
the air (the wire data lives in ies[]), so dropping a member is
layout-safe as long as the module is rebuilt as a whole.

enum ndis_802_11_network_type existed only to type this field, so
remove it as well. No functional change.

Signed-off-by: Cong Nguyen <congnt264@xxxxxxxxx>
---
 drivers/staging/rtl8723bs/core/rtw_ap.c         | 15 ---------------
 drivers/staging/rtl8723bs/core/rtw_mlme.c       | 16 ----------------
 drivers/staging/rtl8723bs/core/rtw_mlme_ext.c   |  2 --
 drivers/staging/rtl8723bs/include/wlan_bssdef.h | 11 +----------
 4 files changed, 1 insertion(+), 43 deletions(-)

diff --git a/drivers/staging/rtl8723bs/core/rtw_ap.c b/drivers/staging/rtl8723bs/core/rtw_ap.c
index 4b4012411011..9a0bc06df6ad 100644
--- a/drivers/staging/rtl8723bs/core/rtw_ap.c
+++ b/drivers/staging/rtl8723bs/core/rtw_ap.c
@@ -1056,21 +1056,6 @@ int rtw_check_beacon_data(struct adapter *padapter, u8 *pbuf,  int len)
 	if (p && ie_len > 0)
 		pHT_info_ie = p;
 
-	switch (network_type) {
-	case WIRELESS_11B:
-		pbss_network->network_type_in_use = Ndis802_11DS;
-		break;
-	case WIRELESS_11G:
-	case WIRELESS_11BG:
-	case WIRELESS_11G_24N:
-	case WIRELESS_11BG_24N:
-		pbss_network->network_type_in_use = Ndis802_11OFDM24;
-		break;
-	default:
-		pbss_network->network_type_in_use = Ndis802_11OFDM24;
-		break;
-	}
-
 	pmlmepriv->cur_network.network_type = network_type;
 
 	pmlmepriv->htpriv.ht_option = false;
diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme.c b/drivers/staging/rtl8723bs/core/rtw_mlme.c
index ddfc56f0253d..587246668a0b 100644
--- a/drivers/staging/rtl8723bs/core/rtw_mlme.c
+++ b/drivers/staging/rtl8723bs/core/rtw_mlme.c
@@ -2127,22 +2127,6 @@ void rtw_update_registrypriv_dev_network(struct adapter *adapter)
 
 	pdev_network->rssi = 0;
 
-	switch (pregistrypriv->wireless_mode) {
-	case WIRELESS_11B:
-		pdev_network->network_type_in_use = (Ndis802_11DS);
-		break;
-	case WIRELESS_11G:
-	case WIRELESS_11BG:
-	case WIRELESS_11_24N:
-	case WIRELESS_11G_24N:
-	case WIRELESS_11BG_24N:
-		pdev_network->network_type_in_use = (Ndis802_11OFDM24);
-		break;
-	default:
-		/*  TODO */
-		break;
-	}
-
 	pdev_network->configuration.ds_config = (pregistrypriv->channel);
 
 	if (cur_network->network.infrastructure_mode == Ndis802_11IBSS)
diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
index 5f00fe282d1b..1235d43789c8 100644
--- a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c
@@ -3971,8 +3971,6 @@ u8 collect_bss_info(struct adapter *padapter, union recv_frame *precv_frame, str
 		memcpy(bssid->supported_rates + i, (p + 2), len);
 	}
 
-	bssid->network_type_in_use = Ndis802_11OFDM24;
-
 	if (bssid->ie_length < 12)
 		return _FAIL;
 
diff --git a/drivers/staging/rtl8723bs/include/wlan_bssdef.h b/drivers/staging/rtl8723bs/include/wlan_bssdef.h
index 812a68394268..f2e1c0834ffc 100644
--- a/drivers/staging/rtl8723bs/include/wlan_bssdef.h
+++ b/drivers/staging/rtl8723bs/include/wlan_bssdef.h
@@ -23,14 +23,6 @@ struct ndis_802_11_ssid {
 	u8  ssid[32];
 };
 
-enum ndis_802_11_network_type {
-	Ndis802_11FH,
-	Ndis802_11DS,
-	Ndis802_11OFDM5,
-	Ndis802_11OFDM24,
-	Ndis802_11NetworkTypeMax    /*  not a real type, defined as an upper bound */
-};
-
 /*
 	FW will only save the channel number in DSConfig.
 	ODI Handler will convert the channel number to freq. number.
@@ -65,7 +57,7 @@ struct ndis_80211_var_ie {
 /* Length is the 4 bytes multiples of the sum of
  * ETH_ALEN + 2 +
  * sizeof (struct ndis_802_11_ssid) + sizeof (u32) +
- * sizeof (long) + sizeof (enum ndis_802_11_network_type) +
+ * sizeof (long) +
  * sizeof (struct ndis_802_11_conf) + sizeof (NDIS_802_11_RATES_EX) + ie_length
  *
  * Except for ie_length, all other fields are fixed length. Therefore, we can
@@ -159,7 +151,6 @@ struct wlan_bssid_ex {
 	struct ndis_802_11_ssid  ssid;
 	u32  privacy;
 	long  rssi;/* in dBM, raw data , get from PHY) */
-	enum ndis_802_11_network_type  network_type_in_use;
 	struct ndis_802_11_conf  configuration;
 	enum ndis_802_11_network_infrastructure  infrastructure_mode;
 	NDIS_802_11_RATES_EX  supported_rates;
-- 
2.25.1