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    Subject[PATCH 4.4 129/312] mac80211: Fix BW upgrade for TDLS peers
    Date
    From: Ilan Peer <ilan.peer@intel.com>

    commit 4b559ec0bfc3a9f41a127cea6964f38b2b4bb323 upstream.

    It is possible that the station is connected to an AP
    with bandwidth of 80+80MHz or 160MHz. In such cases
    there is no need to perform an upgrade as the maximal
    supported bandwidth is 80MHz.

    In addition, when upgrading and setting center_freq1
    and bandwidth to 80MHz also set center_freq2 to 0.

    Fixes: 0fabfaafec3a ("mac80211: upgrade BW of TDLS peers when possible"
    Signed-off-by: Ilan Peer <ilan.peer@intel.com>
    Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
    Signed-off-by: Johannes Berg <johannes.berg@intel.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    net/mac80211/tdls.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    --- a/net/mac80211/tdls.c
    +++ b/net/mac80211/tdls.c
    @@ -314,7 +314,7 @@ ieee80211_tdls_chandef_vht_upgrade(struc
    if (max_width > NL80211_CHAN_WIDTH_80)
    max_width = NL80211_CHAN_WIDTH_80;

    - if (uc.width == max_width)
    + if (uc.width >= max_width)
    return;
    /*
    * Channel usage constrains in the IEEE802.11ac-2013 specification only
    @@ -325,6 +325,7 @@ ieee80211_tdls_chandef_vht_upgrade(struc
    for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++)
    if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) {
    uc.center_freq1 = centers_80mhz[i];
    + uc.center_freq2 = 0;
    uc.width = NL80211_CHAN_WIDTH_80;
    break;
    }

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