On Tue, 2018-06-12 at 16:53 +0200, Jiri Kosina wrote: > On Sun, 10 Jun 2018, Srinivas Pandruvada wrote: > > > From: Even Xu <even...@intel.com> > > > > Current ish driver only register resume/suspend PM callbacks which > > don't support hibernation (suspend to disk). Now use the > > SIMPLE_DEV_PM_OPS() MACRO instead of struct dev_pm_ops directly. > > The suspend and resume functions will now be used for both suspend > > to RAM and hibernation. > > > > If power management is disable, SIMPLE_DEV_PM_OPS will do nothing, > > the suspend and resume related functions won't be used, so mark > > them > > as __maybe_unused to clarify that this is intended behavior, and > > remove #ifdefs for power management. > > This describes details the patch does on code level, but what are the > user > observable effects? Hibernation resume doesn't fail any more? > Hibernation > is possible (and wasn't before)? Did kernel crash while trying to > hibernate and this is the fix? Or ... ? Even, Can you add more details and resubmit ASAP?
Basically after hiberation, the ISH can't resume properly and user may not see sensor events (for example: screen rotation may not work). User will not see a crash or panic or anything except the following message in log: hid-sensor-hub 001F:8086:22D8.0001: timeout waiting for response from ISHTP device So this is adding support for S4/hiberbation to ISH. Thanks, Srinivas > > Thanks, >
