From: "Rafael J. Wysocki" <rjw@sisk.pl>
To: Huang Ying <ying.huang@intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>,
linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
linux-pm@vger.kernel.org
Subject: Re: [BUGFIX 2/2] PCI/PM: Resume device before shutdown
Date: Wed, 24 Oct 2012 23:01:55 +0200 [thread overview]
Message-ID: <3990336.eisiEt4Bt9@vostro.rjw.lan> (raw)
In-Reply-To: <1351061654-8339-2-git-send-email-ying.huang@intel.com>
On Wednesday 24 of October 2012 14:54:14 Huang Ying wrote:
> Some actions during shutdown need device to be in D0 state, such as
> MSI shutdown etc, so resume device before shutdown.
>
> Signed-off-by: Huang Ying <ying.huang@intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
> drivers/pci/pci-driver.c | 12 ++----------
> 1 file changed, 2 insertions(+), 10 deletions(-)
>
> --- a/drivers/pci/pci-driver.c
> +++ b/drivers/pci/pci-driver.c
> @@ -398,6 +398,8 @@ static void pci_device_shutdown(struct d
> struct pci_dev *pci_dev = to_pci_dev(dev);
> struct pci_driver *drv = pci_dev->driver;
>
> + pm_runtime_resume(dev);
> +
> if (drv && drv->shutdown)
> drv->shutdown(pci_dev);
> pci_msi_shutdown(pci_dev);
> @@ -408,16 +410,6 @@ static void pci_device_shutdown(struct d
> * continue to do DMA
> */
> pci_disable_device(pci_dev);
> -
> - /*
> - * Devices may be enabled to wake up by runtime PM, but they need not
> - * be supposed to wake up the system from its "power off" state (e.g.
> - * ACPI S5). Therefore disable wakeup for all devices that aren't
> - * supposed to wake up the system at this point. The state argument
> - * will be ignored by pci_enable_wake().
> - */
> - if (!device_may_wakeup(dev))
> - pci_enable_wake(pci_dev, PCI_UNKNOWN, false);
> }
>
> #ifdef CONFIG_PM
> --
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> Please read the FAQ at http://www.tux.org/lkml/
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
next prev parent reply other threads:[~2012-10-24 20:58 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-24 6:54 [BUGFIX 1/2] PCI/PM: Fix deadlock when unbind device if its parent in D3cold Huang Ying
2012-10-24 6:54 ` [BUGFIX 2/2] PCI/PM: Resume device before shutdown Huang Ying
2012-10-24 21:01 ` Rafael J. Wysocki [this message]
2012-11-02 16:52 ` Bjorn Helgaas
2012-11-02 20:26 ` Rafael J. Wysocki
2012-11-03 5:05 ` Huang Ying
2012-11-03 17:21 ` Bjorn Helgaas
2012-11-04 3:44 ` Huang Ying
2012-10-24 21:01 ` [BUGFIX 1/2] PCI/PM: Fix deadlock when unbind device if its parent in D3cold Rafael J. Wysocki
2012-11-02 16:50 ` Bjorn Helgaas
2012-11-02 20:27 ` Rafael J. Wysocki
2012-11-03 5:06 ` Huang Ying
2012-11-03 17:22 ` Bjorn Helgaas
2012-11-04 3:38 ` Huang Ying
2012-11-05 22:11 ` Bjorn Helgaas
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