From bc5369d4b30c5ea6444468c0d8bcaeaf9525cab6 Mon Sep 17 00:00:00 2001
From: Sergei Makarenkov <serg@no-problem.cc>
Date: Sun, 18 Dec 2016 19:54:27 +0300
Subject: [PATCH] Do not place signal strength into radiotap header if this
 information is not available

---
 core/rtw_recv.c | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/core/rtw_recv.c b/core/rtw_recv.c
index 635bc61..dad0a28 100644
--- a/core/rtw_recv.c
+++ b/core/rtw_recv.c
@@ -4007,7 +4007,7 @@ static sint fill_radiotap_hdr(_adapter *padapter, union recv_frame *precvframe,
 	rtap_hdr = (struct ieee80211_radiotap_header *)&hdr_buf[0];
 	rtap_hdr->it_version = PKTHDR_RADIOTAP_VERSION;
 
-	if(pHalData->NumTotalRFPath>0) {
+	if(pHalData->NumTotalRFPath>0 && pattrib->physt) {
 		rtap_hdr->it_present |=	(1<<IEEE80211_RADIOTAP_EXT) |
 			(1<<IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE);
 
@@ -4109,10 +4109,11 @@ static sint fill_radiotap_hdr(_adapter *padapter, union recv_frame *precvframe,
 	memcpy(&hdr_buf[rt_len], &tmp_16bit, 2);
 	rt_len += 2;
 
-	/* dBm Antenna Signal */
-	rtap_hdr->it_present |= (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
-	hdr_buf[rt_len] = pattrib->phy_info.RecvSignalPower;
-	rt_len += 1;
+	if(pattrib->physt) {
+		/* dBm Antenna Signal */
+		rtap_hdr->it_present |= (1 << IEEE80211_RADIOTAP_DBM_ANTSIGNAL);
+		hdr_buf[rt_len] = pattrib->phy_info.RecvSignalPower;
+		rt_len += 1;
 
 #if 0
 	/* dBm Antenna Noise */
@@ -4121,7 +4122,9 @@ static sint fill_radiotap_hdr(_adapter *padapter, union recv_frame *precvframe,
 	rt_len += 1;
 #endif
 
-	rt_len++;	// alignment
+		rt_len++;	// alignment
+	}
+
 	/* Signal Quality */
 	rtap_hdr->it_present |= (1 << IEEE80211_RADIOTAP_LOCK_QUALITY);
 	tmp_16bit = cpu_to_le16(pattrib->phy_info.SignalQuality);
@@ -4240,13 +4243,14 @@ static sint fill_radiotap_hdr(_adapter *padapter, union recv_frame *precvframe,
 		rt_len += 2;
 	}
 
-	for(i=0; i<pHalData->NumTotalRFPath; i++) {
-		hdr_buf[rt_len] = pattrib->phy_info.RxPwr[i];
-		rt_len ++;
-		hdr_buf[rt_len] = i;
-		rt_len ++;
+	if (pattrib->physt) {
+		for(i=0; i<pHalData->NumTotalRFPath; i++) {
+			hdr_buf[rt_len] = pattrib->phy_info.RxPwr[i];
+			rt_len ++;
+			hdr_buf[rt_len] = i;
+			rt_len ++;
+		}
 	}
-
 	/* push to skb */
 	pskb = (_pkt *)buf;
 	if (skb_headroom(pskb) < rt_len) {