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    mac80211: disable WMM with invalid parameters · 095d81ce
    Johannes Berg 提交于
    Some APs (notably a Sitecom WL-153 v1 with firmware 1.45) are sending
    invalid WMM parameters setting AIFSN, ECWmin and ECWmax to zero. The
    spec mandates that the value of AIFSN is at least 2, and some cards
    (e.g. Intel with the iwldvm driver) can't transmit when the invalid
    QoS parameters are actually uploaded to the firmware.
    
    Since there's little chance of being able to guess the values that
    the AP actually meant, disable WMM if such an invalid case is found.
    Since ECWmin/ECWmax are allowed to be zero, only verify AIFSN >= 2
    and ECWmin <= ECWmax.
    Reviewed-by: NEliad Peller <eliad@wizery.com>
    Reported-by: NAntonio Quartulli <antonio@meshcoding.com>
    Signed-off-by: NJohannes Berg <johannes.berg@intel.com>
    095d81ce
mlme.c 128.3 KB