• Johannes Berg's avatar
    mac80211: unify SW/offload remain-on-channel · 2eb278e0
    Johannes Berg authored
    Redesign all the off-channel code, getting rid of
    the generic off-channel work concept, replacing
    it with a simple remain-on-channel list.
    This fixes a number of small issues with the ROC
     * offloaded remain-on-channel couldn't be queued,
       now we can queue it as well, if needed
     * in iwlwifi (the only user) offloaded ROC is
       mutually exclusive with scanning, use the new
       queue to handle that case -- I expect that it
       will later depend on a HW flag
    The bigger issue though is that there's a bad bug
    in the current implementation: if we get a mgmt
    TX request while HW roc is active, and this new
    request has a wait time, we actually schedule a
    software ROC instead since we can't guarantee the
    existing offloaded ROC will still be that long.
    To fix this, the queuing mechanism was needed.
    The queuing mechanism for offloaded ROC isn't yet
    optimal, ideally we should add API to have the HW
    extend the ROC if needed. We could add that later
    but for now use a software implementation.
    Overall, this unifies the behaviour between the
    offloaded and software-implemented case as much
    as possible.
    Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
    Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
mac80211.h 150 KB