From: Alvin Šipraga <ALSI@bang-olufsen.dk> stable inclusion from linux-4.19.198 commit f5c8dbcb2a08aa2ccf7c94e26e2aa67ac0a4f399 -------------------------------- [ Upstream commit feb45643762172110cb3a44f99dd54304f33b711 ] The sinfo->chains field is a bitmask for filled values in chain_signal and chain_signal_avg, not a count. Treat it as such so that the driver can properly report per-chain RSSI information. Before (MIMO mode): $ iw dev wlan0 station dump ... signal: -51 [-51] dBm After (MIMO mode): $ iw dev wlan0 station dump ... signal: -53 [-53, -54] dBm Fixes: cae355dc90db ("brcmfmac: Add RSSI information to get_station.") Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/20210506132010.3964484-1-alsi@bang-olufsen.dk Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c index 96dc9e5ab23f4..de8fd5780932a 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c @@ -2614,6 +2614,7 @@ brcmf_cfg80211_get_station(struct wiphy *wiphy, struct net_device *ndev, count_rssi = 0; for (i = 0; i < BRCMF_ANT_MAX; i++) { if (sta_info_le.rssi[i]) { + sinfo->chains |= BIT(count_rssi); sinfo->chain_signal_avg[count_rssi] = sta_info_le.rssi[i]; sinfo->chain_signal[count_rssi] = @@ -2624,8 +2625,6 @@ brcmf_cfg80211_get_station(struct wiphy *wiphy, struct net_device *ndev, } if (count_rssi) { sinfo->filled |= BIT_ULL(NL80211_STA_INFO_CHAIN_SIGNAL); - sinfo->chains = count_rssi; - sinfo->filled |= BIT_ULL(NL80211_STA_INFO_SIGNAL); total_rssi /= count_rssi; sinfo->signal = total_rssi; -- 2.25.1