On Thu, Feb 13, 2020 at 02:51:20AM +0300, Dmitry Osipenko wrote: > Pen-locking is meant to block CPU0 if CPU1 wakes up during of entering > into LP2 because of some interrupt firing up, preventing unnecessary LP2 > enter that will be resumed immediately. Apparently this case doesn't > happen often in practice, I checked how often it takes place and found > that after ~20 hours of browsing web, managing email, watching videos and > idling (15+ hours) there is only a dozen of early LP2 entering abortions > and they all happened while device was idling. Thus let's remove the > pen-locking and make LP2 entering uninterruptible, simplifying code quite > a lot. This will also become very handy for the upcoming unified cpuidle > driver, allowing to have a common LP2 code-path across of different > hardware generations. > > Acked-by: Peter De Schrijver <pdeschrijver@xxxxxxxxxx> > Tested-by: Peter Geis <pgwipeout@xxxxxxxxx> > Tested-by: Jasper Korten <jja2000@xxxxxxxxx> > Tested-by: David Heidelberg <david@xxxxxxx> > Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx> Acked-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
