Quoting Daniel Campello (2020-07-28 16:05:16) > Checks for non-zero return values to signal error conditions. > > Signed-off-by: Daniel Campello <campello@xxxxxxxxxxxx> > Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> > --- Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx> The mutex_lock, unlock, wait, lock, check wait, unlock sequence can be improved in another patch.