Commit 838f4279 authored by Felix Fietkau's avatar Felix Fietkau Committed by John W. Linville

ath9k_htc: fix signal strength handling issues

The ath9k commit 2ef16755
(ath9k: fix signal strength reporting issues) fixed an issue where the
reported per-frame signal strength reported to mac80211 was being
overwritten with an internal average. The same issue is also present
in ath9k_htc.
In addition to preventing the driver from overwriting the value, this
commit also ensures that the internal average (which is used for ANI)
only tracks beacons of the AP that we're connected to.
Signed-off-by: default avatarFelix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent a3d63cad
......@@ -22,6 +22,7 @@
#include <linux/firmware.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/leds.h>
#include <linux/slab.h>
#include <net/mac80211.h>
......
......@@ -1067,15 +1067,19 @@ static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
last_rssi = priv->rx.last_rssi;
if (ieee80211_is_beacon(hdr->frame_control) &&
!is_zero_ether_addr(common->curbssid) &&
ether_addr_equal(hdr->addr3, common->curbssid)) {
s8 rssi = rxbuf->rxstatus.rs_rssi;
if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi,
ATH_RSSI_EP_MULTIPLIER);
rssi = ATH_EP_RND(last_rssi, ATH_RSSI_EP_MULTIPLIER);
if (rxbuf->rxstatus.rs_rssi < 0)
rxbuf->rxstatus.rs_rssi = 0;
if (rssi < 0)
rssi = 0;
if (ieee80211_is_beacon(fc))
priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi;
priv->ah->stats.avgbrssi = rssi;
}
rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp);
rx_status->band = hw->conf.channel->band;
......
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