• Ben Greear's avatar
    mac80211: Fix setting txpower to zero · db6d9e9e
    Ben Greear authored
    With multiple VIFS ath10k, and probably others, tries to find the
    minimum txpower for all vifs and uses that when setting txpower in
    the firmware.
    
    If a second vif is added and starts to scan, it's txpower is not
    initialized yet and it set to zero.
    
    ath10k had a patch to ignore zero values, but then it is impossible
    to actually set txpower to zero.
    
    So, instead initialize the txpower to INT_MIN in mac80211, and let
    drivers know that means the power has not been set and so should
    be ignored.
    
    This should fix regression in:
    
    commit 88407beb
    Author: Ryan Hsu <ryanhsu@qca.qualcomm.com>
    Date:   Tue Dec 13 14:55:19 2016 -0800
    
        ath10k: fix incorrect txpower set by P2P_DEVICE interface
    
    Tested on ath10k 9984 with ath10k-ct firmware.
    Signed-off-by: default avatarBen Greear <greearb@candelatech.com>
    Link: https://lore.kernel.org/r/20191217183057.24586-1-greearb@candelatech.comSigned-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
    db6d9e9e
xmit.c 73.1 KB