From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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>,
LKML <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [RFC][PATCH 0/2] Make radeonfb use PCI PM core for suspendig device (was: Re: [RFC][PATCH] PCI PM: Be extra careful when changing power states of devices)
Date: Mon, 23 Mar 2009 11:09:02 +1100 [thread overview]
Message-ID: <1237766942.25062.680.camel@pasglop> (raw)
In-Reply-To: <200903222208.22434.rjw@sisk.pl>
On Sun, 2009-03-22 at 22:08 +0100, Rafael J. Wysocki wrote:
> On Saturday 21 March 2009, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rjw@sisk.pl>
> >
> > The story in http://bugzilla.kernel.org/show_bug.cgi?id=12846 shows
> > that setting the power state of a PCI device by
> > pci_raw_set_power_state() may sometimes fail. For this reason,
> > pci_raw_set_power_state() should not assume that the power state of
> > the device has actually changed after writing into its PMCSR.
> > Instead, it should read the value from there and use it to update
> > dev->current_state. It also is useful to print a warning if the
> > device's power state hasn't changed as expected.
> >
> > Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
> > ---
> OK, since the Ben's radeonfb fix for bug #12846 has been merged, I'd like
> to do something a bit different.
>
> Patch 1/2 introduces __pci_set_power_state() that will allow the radeonfb
> driver not to open code PCI PM operations.
>
> Patch 2/2 makes the driver use __pci_set_power_state().
>
> Comments welcome.
No objection.
Ben.
next prev parent reply other threads:[~2009-03-23 0:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-20 23:03 [RFC][PATCH] PCI PM: Be extra careful when changing power states of devices Rafael J. Wysocki
2009-03-22 21:08 ` [RFC][PATCH 0/2] Make radeonfb use PCI PM core for suspendig device (was: Re: [RFC][PATCH] PCI PM: Be extra careful when changing power states of devices) Rafael J. Wysocki
2009-03-22 21:11 ` [RFC][PATCH 1/2] PCI PM: Introduce __pci_set_power_state() Rafael J. Wysocki
2009-03-22 23:08 ` [linux-pm] " Nigel Cunningham
2009-03-23 18:14 ` Rafael J. Wysocki
2009-03-22 21:13 ` [RFC][PATCH 2/2] radeonfb: Avoid open coding of PCI PM operations Rafael J. Wysocki
2009-03-23 0:09 ` Benjamin Herrenschmidt [this message]
2009-03-23 23:01 ` [RFC][PATCH 0/2] Make radeonfb use PCI PM core for suspendig device (was: Re: [RFC][PATCH] PCI PM: Be extra careful when changing power states of devices) Rafael J. Wysocki
2009-03-23 21:30 ` [RFC][PATCH 0/2] Export platform_pci_set_power_state() and make radeonfb use it Rafael J. Wysocki
2009-03-23 21:31 ` [RFC][PATCH 1/2] PCI PM: Export platform_pci_set_power_state() Rafael J. Wysocki
2009-03-23 21:32 ` [RFC][PATCH 2/2] radeonfb: Use platform_pci_set_power_state() Rafael J. Wysocki
2009-03-23 22:23 ` [RFC][PATCH 0/2] Export platform_pci_set_power_state() and make radeonfb use it Jesse Barnes
2009-03-24 0:57 ` Benjamin Herrenschmidt
2009-03-24 1:14 ` Jesse Barnes
2009-03-24 11:00 ` Rafael J. Wysocki
2009-03-24 21:12 ` Benjamin Herrenschmidt
2009-03-24 22:00 ` Rafael J. Wysocki
2009-03-24 22:25 ` Rafael J. Wysocki
2009-03-24 22:04 ` Alex Deucher
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1237766942.25062.680.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=akpm@linux-foundation.org \
--cc=jbarnes@virtuousgeek.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pci@vger.kernel.org \
--cc=linux-pm@lists.linux-foundation.org \
--cc=rjw@sisk.pl \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).