• Mark Brown's avatar
    mfd: Clean up after WM83xx AUXADC interrupt if it arrives late · 5051d411
    Mark Brown authored
    In certain circumstances, especially under heavy load, the AUXADC
    completion interrupt may be detected after we've timed out waiting for
    it.  That conversion would still succeed but the next conversion will
    see the completion that was signalled by the interrupt for the previous
    conversion and therefore not wait for the AUXADC conversion to run,
    causing it to report failure.
    
    Provide a simple, non-invasive cleanup by using try_wait_for_completion()
    to ensure that the completion is not signalled before we wait.  Since
    the AUXADC is run within a mutex we know there can only have been at
    most one AUXADC interrupt outstanding.  A more involved change should
    follow for the next merge window.
    Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
    Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
    5051d411
wm8350-core.c 18 KB