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ath9k_htc: fix signal strength handling issues

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The ath9k commit 2ef167557c
(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: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2013-02-22 21:37:25 +01:00 committed by John W. Linville
parent a3d63cadba
commit 838f427955
2 changed files with 12 additions and 7 deletions
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1
drivers/net/wireless/ath/ath9k/htc.h
View file

@ -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>

18
drivers/net/wireless/ath/ath9k/htc_drv_txrx.c
View file

@ -1067,15 +1067,19 @@ static bool ath9k_rx_prepare(struct ath9k_htc_priv *priv,
last_rssi = priv->rx.last_rssi;
if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
rxbuf->rxstatus.rs_rssi = ATH_EP_RND(last_rssi,
ATH_RSSI_EP_MULTIPLIER);
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 (rxbuf->rxstatus.rs_rssi < 0)
rxbuf->rxstatus.rs_rssi = 0;
if (likely(last_rssi != ATH_RSSI_DUMMY_MARKER))
rssi = ATH_EP_RND(last_rssi, ATH_RSSI_EP_MULTIPLIER);
if (ieee80211_is_beacon(fc))
priv->ah->stats.avgbrssi = rxbuf->rxstatus.rs_rssi;
if (rssi < 0)
rssi = 0;
priv->ah->stats.avgbrssi = rssi;
}
rx_status->mactime = be64_to_cpu(rxbuf->rxstatus.rs_tstamp);
rx_status->band = hw->conf.channel->band;