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From: Nigel Cunningham <ncunningham@crca.org.au>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>,
	Linux PCI <linux-pci@vger.kernel.org>,
	pm list <linux-pm@lists.linux-foundation.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [linux-pm] [PATCH 2/3] PCI PM: Let the core be more careful with respect to drivers using new framework
Date: Mon, 02 Feb 2009 13:06:40 +1100	[thread overview]
Message-ID: <1233540400.21871.7.camel@nigel-laptop> (raw)
In-Reply-To: <200902012233.17790.rjw@sisk.pl>

Hi Rafael.

Just a couple of typos in the comment:

On Sun, 2009-02-01 at 22:33 +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@sisk.pl>
> 
> Currently, the PM core always attempts to manage devices with drivers
> that use the new PM framework.  In particular, it attempts to disable
> the devices (which is unnecessary), to save their state (which may be
> undesirable if the driver has done that already) and to put them into
> low power states (again, this may be undesirable if the driver has
> already put the device into a low power state).  That need not be
> the right thing to do, so make the core be more careful in this
> respect.
> 
> Generally, there are the following categories of devices to consider:
> * bridge devices without drivers
> * non-bridge devices without drivers
> * bridge devices with drivers
> * non-bridge devices with drivers
> and each of them should be handled differently.
> 
> For bridge devices without drivers the PCI PM core will save their
> state on suspend and restore it (early) during resume, after putting
> them into D0 if necessary.  It will not attepmt to do anything else

s/attepmt/attempt/

> to these devices.
> 
> For non-bridge devices without drivers the PCI PM core will disable
> them and save their state on suspend.  During resume, it will put
> them into D0, if necessary, restore their state (early) and reenable
> them.
> 
> For bridge devices without drivers the PCI PM core will only save

s/without/with/

> their state on suspend if the driver hasn't done that already.
> Still, the core will restore their state (early) during resume,
> after putting them into D0, if necessary.
> 
> For non-bridge devices with drivers the PCI PM core will only save
> their state on suspend if the driver hasn't done that already.  Also,
> if the state of the device hasn't been saved by the driver, the core
> will attempt to put the device into a low power state.  During
> resume the core will restore the state of the device (early), after
> putting it into D0, if necessary.
> 
> For all devices the core will disable wake-up during resume.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>

I'm not pretending to understand the gory details of the code itself,
and so don't want you to add a Reviewed-by or such like for me, thanks.

Regards,

Nigel


  reply	other threads:[~2009-02-02  2:06 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-02-01 21:29 [PATCH 0/3] PCI PM: More refinements of suspend-resume framework Rafael J. Wysocki
2009-02-01 21:31 ` [PATCH 1/3] PCI PM: Do not disable and enable bridges during suspend-resume Rafael J. Wysocki
2009-02-07  9:50   ` Pavel Machek
2009-02-07 13:48     ` Rafael J. Wysocki
2009-02-08  9:11       ` Pavel Machek
2009-02-08 13:23         ` Rafael J. Wysocki
2009-02-09  9:39           ` Pavel Machek
2009-02-10  0:21             ` Rafael J. Wysocki
2009-02-01 21:33 ` [PATCH 2/3] PCI PM: Let the core be more careful with respect to drivers using new framework Rafael J. Wysocki
2009-02-02  2:06   ` Nigel Cunningham [this message]
2009-02-02 12:04     ` [linux-pm] " Rafael J. Wysocki
2009-02-02 17:27       ` Rafael J. Wysocki
2009-02-01 21:34 ` [PATCH 3/3] PCI PM: Make warning in pci_legacy_suspend more useful Rafael J. Wysocki
2009-02-02  2:10   ` [linux-pm] " Nigel Cunningham
2009-02-02 12:02     ` Rafael J. Wysocki
2009-02-02 18:32 ` [PATCH 0/3] PCI PM: More refinements of suspend-resume framework Jesse Barnes
2009-02-03  3:25   ` Linus Torvalds
2009-02-03  8:26     ` Rafael J. Wysocki

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