Messages in this thread | | | From | "Rafael J. Wysocki" <> | Date | Tue, 12 Feb 2019 19:59:37 +0100 | Subject | Re: [PATCH] drivers: base: add support to skip power management in device/driver model |
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On Tue, Feb 12, 2019 at 7:20 PM Sudeep Holla <sudeep.holla@arm.com> wrote: > > On Tue, Feb 12, 2019 at 07:07:31PM +0100, Rafael J. Wysocki wrote: > > On Tue, Feb 12, 2019 at 6:49 PM Sudeep Holla <sudeep.holla@arm.com> wrote: > > > > > > On Mon, Feb 11, 2019 at 05:20:20PM +0100, Ulf Hansson wrote: > > > > On Thu, 7 Feb 2019 at 16:29, Sudeep Holla <sudeep.holla@arm.com> wrote: > > > > > > > > > > On Thu, Feb 07, 2019 at 04:18:57PM +0100, Ulf Hansson wrote: > > > > > > On Thu, 7 Feb 2019 at 16:06, Sudeep Holla <sudeep.holla@arm.com> wrote: > > > > > > > > > > [...] > > > > > > > > > > > > Indeed, I was ignoring knowing that it's harmless. But more people > > > > > > > started to complain, and Rafael suggested this which I agree as we > > > > > > > have several pseudo devices created in the kernel that we can bypass > > > > > > > some of these pm handling knowing we won't need it. > > > > > > > > > > > > Okay, I see. > > > > > > > > > > > > Anyway, I will likely need to restore part of this change, via my > > > > > > cluster idling series then. As from that point, the cpu device that > > > > > > you call device_set_pm_not_required() for, starts to be used from both > > > > > > PM core and runtime PM point of view. But I guess that's okay then. > > > > > > > > > > > > > > > > Ah I see. I can drop for CPU devices then. Since I didn't see any use for > > > > > them, I set the flag, but I can drop it now or you can do that as part > > > > > of that series. > > > > > > > > Well, I prefer if you drop it for CPU devices, as least for now. > > > > > > > > > There are quite a few devices(especially the ones > > > > > registered under system subsys can set this but I would take it separate > > > > > once we settle on this). Also Rafael may have seen use for few more > > > > > devices when he suggested this. > > > > > > > > Yep, let's find another first user of this. > > > > > > > > Additionally, it seems like we should drop the print in device_pm_add(). > > > > > > > > > > Hi Rafael, > > > > > > Do you prefer to drop the error message or retain it as is ? > > > > Do you mean the one in device_pm_add()? > > > > Yes, the warning "parent should not be sleeping" in device_pm_add(). I > would prefer to keep it as is for now.
OK, do that, then. :-)
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