From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
pm list <linux-pm@lists.linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Linux PCI <linux-pci@vger.kernel.org>
Subject: Re: [PATCH 7/7] PCI PM: Let the core be more careful with respect to drivers using new framework
Date: Wed, 04 Feb 2009 13:05:53 +1100 [thread overview]
Message-ID: <1233713153.16867.143.camel@pasglop> (raw)
In-Reply-To: <200902040209.08633.rjw@sisk.pl>
> 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.
This is "without drivers" only or does it include devices that have a
driver and no PM ops ?
In the later case, the worry is that the driver will potentially still
take shared interrupts after you have disabled the device. I know the
normal disable path only disables bus mastering, which is a GOOD
thing :-) but the pcibios hook might do more here ...
I would recommend only doing that disabling in the "noirq" phase of
suspend to avoid problems here. Do you see any reason that wouldn't
work ?
Cheers,
Ben.
next prev parent reply other threads:[~2009-02-04 2:07 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-04 0:54 [PATCH 0/7] PCI PM: Fixes and refinements Rafael J. Wysocki
2009-02-04 0:56 ` [PATCH 1/7] PCI PM: Fix handling of devices without drivers Rafael J. Wysocki
2009-02-04 1:53 ` Benjamin Herrenschmidt
2009-02-04 2:23 ` Linus Torvalds
2009-02-04 2:49 ` Benjamin Herrenschmidt
2009-02-04 12:12 ` Rafael J. Wysocki
2009-02-04 12:10 ` Rafael J. Wysocki
2009-02-04 0:57 ` [PATCH 2/7] PCI PM: Check if the state has been saved before trying to restore it Rafael J. Wysocki
2009-02-04 1:54 ` Benjamin Herrenschmidt
2009-02-04 0:59 ` [PATCH 3/7] PCI PM: Fix saving of device state in pci_legacy_suspend Rafael J. Wysocki
2009-02-04 1:56 ` Benjamin Herrenschmidt
2009-02-04 10:14 ` Frans Pop
2009-02-04 21:38 ` Benjamin Herrenschmidt
2009-02-04 21:53 ` Frans Pop
2009-02-04 21:56 ` Linus Torvalds
2009-02-05 0:40 ` Benjamin Herrenschmidt
2009-02-05 0:57 ` Michael Ellerman
2009-02-05 1:29 ` Benjamin Herrenschmidt
2009-02-05 2:58 ` Michael Ellerman
2009-02-05 4:06 ` Benjamin Herrenschmidt
2009-02-04 1:00 ` [PATCH 4/7] PCI PCIe portdrv: Simplify suspend and resume Rafael J. Wysocki
2009-02-04 1:01 ` [PATCH 5/7] PCI PM: Do not disable and enable bridges during suspend-resume Rafael J. Wysocki
2009-02-04 1:02 ` [PATCH 6/7] PCI PM: Read power state from device after trying to change it on resume Rafael J. Wysocki
2009-02-04 1:09 ` [PATCH 7/7] PCI PM: Let the core be more careful with respect to drivers using new framework Rafael J. Wysocki
2009-02-04 2:05 ` Benjamin Herrenschmidt [this message]
2009-02-05 0:47 ` Rafael J. Wysocki
2009-02-05 1:18 ` Benjamin Herrenschmidt
2009-02-05 1:23 ` [PATCH 0/7] PCI PM: Fixes and refinements Jesse Barnes
2009-02-05 1:48 ` Rafael J. Wysocki
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