• Thomas Pugliese's avatar
    USB: HWA: fix device probe failure · a8995751
    Thomas Pugliese authored
    This patch fixes a race condition that caused the HWA_HC interface probe
    function to occasionally fail.  The HWA_HC would attempt to register
    itself with the HWA_RC by searching for a uwb_rc class device with the
    same parent device ptr.  If the probe function for the HWA_RC interface
    had yet to run, the uwb_rc class device would not have been created
    causing the look up to fail and the HWA_HC probe function to return an
    error causing the device to be unusable.
    
    The fix is for the HWA to delay registering with the HWA_RC until
    receiving the command from userspace to start the wireless channel.  It
    is the responsibility of userspace to ensure that the uwb_rc class
    device has been created before starting the HWA channel.
    Signed-off-by: default avatarThomas Pugliese <thomas.pugliese@gmail.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    a8995751
wusbhc.c 13.6 KB