This patch should fix the dodgy signal and noise value reports for most longbow (p54spi) users: e.g.: (an older tcpdump extract) > 2.0 Mb/s 2437 MHz (0x00a0) -49dB signal -41dB noise > 1.0 Mb/s 2437 MHz (0x00a0) 4dB signal -41dB noise The formula is taken from stlc45xx: http://gitorious.org/stlc45xx/mainline/blobs/master/stlc45xx.c#line1199 Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxxxxxxx> --- diff --git a/drivers/net/wireless/p54/txrx.c b/drivers/net/wireless/p54/txrx.c index 1dc0dbf..1fe971c 100644 --- a/drivers/net/wireless/p54/txrx.c +++ b/drivers/net/wireless/p54/txrx.c @@ -275,15 +275,15 @@ static int p54_rssi_to_dbm(struct p54_common *priv, int rssi) { int band = priv->hw->conf.channel->band; - if (priv->rxhw != 5) + if (priv->rxhw != 5) { return ((rssi * priv->rssical_db[band].mul) / 64 + priv->rssical_db[band].add) / 4; - else + } else { /* * TODO: find the correct formula */ - return ((rssi * priv->rssical_db[band].mul) / 64 + - priv->rssical_db[band].add) / 4; + return rssi / 2 - 110; + } } /* -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
