• Emmanuel Grumbach's avatar
    iwlwifi: mvm: fix firmware debug restart recording · addce854
    Emmanuel Grumbach authored
    When we want to stop the recording of the firmware debug
    and restart it later without reloading the firmware we
    don't need to resend the configuration that comes with
    host commands.
    Sending those commands confused the hardware and led to
    an NMI 0x66.
    
    Change the flow as following:
    * read the relevant registers (DBGC_IN_SAMPLE, DBGC_OUT_CTRL)
    * clear those registers
    * wait for the hardware to complete its write to the buffer
    * get the data
    * restore the value of those registers (to restart the
      recording)
    
    For early start (where the configuration is already
    compiled in the firmware), we don't need to set those
    registers after the firmware has been loaded, but only
    when we want to restart the recording without having
    restarted the firmware.
    Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
    Signed-off-by: default avatarLuca Coelho <luciano.coelho@intel.com>
    addce854
ops.c 50.5 KB