staging: rtl8723au: Use _FIXED_IE_LEN_ instead of hard coded value

This should help catching all the users once we stop carrying the
fixed beacon elements in the IE array.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723au/core/rtw_mlme.c

@@ -1929,7 +1929,7 @@ int rtw_restruct_wmm_ie23a(struct rtw_adapter *adapter, u8 *in_ie,
 	unsigned int ielength = 0;
 	unsigned int i, j;
 
-	i = 12; /* after the fixed IE */
+	i = _FIXED_IE_LENGTH_; /* after the fixed IE */
 	while (i < in_len) {
 		ielength = initial_out_len;
 
@@ -2039,8 +2039,8 @@ int rtw_restruct_sec_ie23a(struct rtw_adapter *adapter, u8 *in_ie, u8 *out_ie,
 		  "ndissecuritytype=%d\n", ndisauthmode, ndissecuritytype));
 
 	/* copy fixed ie only */
-	memcpy(out_ie, in_ie, 12);
-	ielength = 12;
+	memcpy(out_ie, in_ie, _FIXED_IE_LENGTH_);
+	ielength = _FIXED_IE_LENGTH_;
 	if (ndisauthmode == Ndis802_11AuthModeWPA ||
 	    ndisauthmode == Ndis802_11AuthModeWPAPSK)
 		authmode = WLAN_EID_VENDOR_SPECIFIC;
@@ -2171,7 +2171,8 @@ bool rtw_restructure_ht_ie23a(struct rtw_adapter *padapter, u8 *in_ie,
 
 	phtpriv->ht_option = false;
 
-	p = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, in_ie + 12, in_len -12);
+	p = cfg80211_find_ie(WLAN_EID_HT_CAPABILITY, in_ie + _FIXED_IE_LENGTH_,
+			     in_len - _FIXED_IE_LENGTH_);
 
 	if (p && p[1] > 0) {
 		u32 rx_packet_offset, max_recvbuf_sz;
@@ -2216,8 +2217,9 @@ bool rtw_restructure_ht_ie23a(struct rtw_adapter *padapter, u8 *in_ie,
 
 		phtpriv->ht_option = true;
 
-		p = cfg80211_find_ie(WLAN_EID_HT_OPERATION, in_ie + 12,
-				     in_len -12);
+		p = cfg80211_find_ie(WLAN_EID_HT_OPERATION,
+				     in_ie + _FIXED_IE_LENGTH_,
+				     in_len - _FIXED_IE_LENGTH_);
 		if (p && (p[1] == sizeof(struct ieee80211_ht_operation))) {
 			out_len = *pout_len;
 			pframe = rtw_set_ie23a(out_ie + out_len,

drivers/staging/rtl8723au/core/rtw_mlme_ext.c

@@ -4254,7 +4254,7 @@ static struct wlan_bssid_ex *collect_bss_info(struct rtw_adapter *padapter,
 		memcpy(bssid->SupportedRates + i, p + 2, p[1]);
 	}
 
-	if (bssid->IELength < 12)
+	if (bssid->IELength < _FIXED_IE_LENGTH_)
 		goto fail;
 
 	/*  Checking for DSConfig */