wl1271: add get_survey callback in order to get channel noise

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Acked-by: Juuso Oikarinen <juuso.oikarinen@nokia.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/wl1271_rx.c b/drivers/net/wireless/wl12xx/wl1271_rx.c
index e98f22b3c3ba..019aa79cd9df 100644
--- a/drivers/net/wireless/wl12xx/wl1271_rx.c
+++ b/drivers/net/wireless/wl12xx/wl1271_rx.c
@@ -55,6 +55,13 @@ static void wl1271_rx_status(struct wl1271 *wl,
 
         status->signal = desc->rssi;
 
+        /*
+         * FIXME: In wl1251, the SNR should be divided by two.  In wl1271 we
+         * need to divide by two for now, but TI has been discussing about
+         * changing it.  This needs to be rechecked.
+         */
+        wl->noise = desc->rssi - (desc->snr >> 1);
+
         status->freq = ieee80211_channel_to_frequency(desc->channel);
 
         if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) {