Commit afe6a610 authored by Mordechay Goodstein's avatar Mordechay Goodstein Committed by Greg Kroah-Hartman

cfg80211: util: fix bit count off by one

[ Upstream commit 1a473d60 ]

The bits of Rx MCS Map in VHT capability were enumerated
with index transform - index i -> (i + 1) bit => nss i. BUG!
while it should be -   index i -> (i + 1) bit => (i + 1) nss.

The bug was exposed in commit a53b2a0b ("iwlwifi: mvm: implement VHT
extended NSS support in rs.c"), where iwlwifi started using the
function.
Signed-off-by: default avatarMordechay Goodstein <mordechay.goodstein@intel.com>
Fixes: b0aa75f0 ("ieee80211: add new VHT capability fields/parsing")
Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent d2aab114
......@@ -1989,7 +1989,7 @@ int ieee80211_get_vht_max_nss(struct ieee80211_vht_cap *cap,
continue;
if (supp >= mcs_encoding) {
max_vht_nss = i;
max_vht_nss = i + 1;
break;
}
}
......
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