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From: Ulf Hansson <ulf.hansson@linaro.org>
To: Sudeep Holla <sudeep.holla@arm.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux PM <linux-pm@vger.kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Jisheng Zhang <jszhang@marvell.com>,
	Steve Longerbeam <slongerbeam@gmail.com>,
	Eugeniu Rosca <erosca@de.adit-jv.com>,
	Joshua Frkuska <joshua_frkuska@mentor.com>,
	Eugeniu Rosca <roscaeugeniu@gmail.com>
Subject: Re: [PATCH] drivers: base: add support to skip power management in device/driver model
Date: Mon, 11 Feb 2019 17:20:20 +0100	[thread overview]
Message-ID: <CAPDyKFrV7XpKK-Pds=BNgJm9EC50C0wB_f99DK-6N7+K8aZXZw@mail.gmail.com> (raw)
In-Reply-To: <20190207152908.GC14464@e107155-lin>

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().

Kind regards
Uffe

  reply	other threads:[~2019-02-11 16:21 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-06 15:09 [PATCH] drivers: base: add support to skip power management in device/driver model Sudeep Holla
2019-02-06 15:41 ` Sudeep Holla
2019-02-07  9:53 ` Ulf Hansson
2019-02-07 10:36   ` Sudeep Holla
2019-02-07 14:29     ` Ulf Hansson
2019-02-07 15:06       ` Sudeep Holla
2019-02-07 15:18         ` Ulf Hansson
2019-02-07 15:29           ` Sudeep Holla
2019-02-11 16:20             ` Ulf Hansson [this message]
2019-02-12 17:49               ` Sudeep Holla
2019-02-12 18:07                 ` Rafael J. Wysocki
2019-02-12 18:20                   ` Sudeep Holla
2019-02-12 18:59                     ` Rafael J. Wysocki
2019-02-15  8:21 ` [LKP] [drivers] a0c863ed70: WARNING:at_fs/sysfs/group.c:#sysfs_remove_group kernel test robot

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