From b08fb3883ca3d5f4284cde0a5d3fd88dde216621 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Fri, 17 Sep 2010 22:22:50 +0200 Subject: [PATCH] carl9170: fix noise dBm conversion Ever since carl9170 gained support to read the noisefloor, the reported noisefloor level was pretty poor. Initially I assumed that something was wrong in the PHY setup and it would be impossible to fix without any guidances. But this was not the case. In fact the nf readings were correct and the thing that was broken was the "simple" sign extension code! Signed-off-by: Christian Lamparter Signed-off-by: John W. Linville --- drivers/net/wireless/ath/carl9170/phy.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/carl9170/phy.c b/drivers/net/wireless/ath/carl9170/phy.c index fe265e3e6ac48..7df8f711f5d8f 100644 --- a/drivers/net/wireless/ath/carl9170/phy.c +++ b/drivers/net/wireless/ath/carl9170/phy.c @@ -1558,9 +1558,9 @@ static int carl9170_set_power_cal(struct ar9170 *ar, u32 freq, static int carl9170_calc_noise_dbm(u32 raw_noise) { if (raw_noise & 0x100) - return ~((raw_noise & 0x0ff) >> 1); + return ~0x1ff | raw_noise; else - return (raw_noise & 0xff) >> 1; + return raw_noise; } int carl9170_get_noisefloor(struct ar9170 *ar) -- 2.39.5