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carl9170: fix signal strength reporting issues 

On A-MPDU frames, the hardware only reports valid
signal strength data for the last subframe.

This patch fixes it by flagging everything but the
last subframe in an A-MPDU to tell mac80211 to
ignore the signal strength entirely. Otherwise
the empty value (= 0 dbm) will distort the
average quite badly.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Christian Lamparter 2012-12-02 16:52:00 +01:00 committed by John W. Linville
parent 33e274e669
commit 649a6ac4a7
1 changed files with 2 additions and 0 deletions
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2
drivers/net/wireless/ath/carl9170/rx.c
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@ -814,6 +814,8 @@ static void carl9170_rx_untie_data(struct ar9170 *ar, u8 *buf, int len)
if (phy)
carl9170_rx_phy_status(ar, phy, &status);
else
status.flag |= RX_FLAG_NO_SIGNAL_VAL;
if (carl9170_handle_mpdu(ar, buf, mpdu_len, &status))
goto drop;