From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@intel.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Michael Kelley <mikelley@microsoft.com>,
Sasha Levin <Alexander.Levin@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>,
KY Srinivasan <kys@microsoft.com>,
Stephen Hemminger <sthemmin@microsoft.com>,
olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com,
vkuznets@redhat.com, marcelo.cerri@canonical.com,
jackm@mellanox.com, linux-pci@vger.kernel.org,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
driverdev-devel@linuxdriverproject.org,
Bjorn Helgaas <bhelgaas@google.com>
Subject: Re: [PATCH 4/7] PCI/PM: Run resume fixups before disabling wakeup events
Date: Tue, 15 Oct 2019 19:21:39 +0200 [thread overview]
Message-ID: <6808286.qxd3Zai2y5@kreacher> (raw)
In-Reply-To: <20191014230016.240912-5-helgaas@kernel.org>
On Tuesday, October 15, 2019 1:00:13 AM CEST Bjorn Helgaas wrote:
> From: Bjorn Helgaas <bhelgaas@google.com>
>
> pci_pm_resume() and pci_pm_restore() call pci_pm_default_resume(), which
> runs resume fixups before disabling wakeup events:
>
> static void pci_pm_default_resume(struct pci_dev *pci_dev)
> {
> pci_fixup_device(pci_fixup_resume, pci_dev);
> pci_enable_wake(pci_dev, PCI_D0, false);
> }
>
> pci_pm_runtime_resume() does both of these, but in the opposite order:
>
> pci_enable_wake(pci_dev, PCI_D0, false);
> pci_fixup_device(pci_fixup_resume, pci_dev);
>
> We should always use the same ordering unless there's a reason to do
> otherwise.
Right.
> Change pci_pm_runtime_resume() to call pci_pm_default_resume()
> instead of open-coding this, so the fixups are always done before disabling
> wakeup events.
>
> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
No concerns about this change, so
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
> drivers/pci/pci-driver.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
> index 0c3086793e4e..55acb658273f 100644
> --- a/drivers/pci/pci-driver.c
> +++ b/drivers/pci/pci-driver.c
> @@ -1345,8 +1345,7 @@ static int pci_pm_runtime_resume(struct device *dev)
> return 0;
>
> pci_fixup_device(pci_fixup_resume_early, pci_dev);
> - pci_enable_wake(pci_dev, PCI_D0, false);
> - pci_fixup_device(pci_fixup_resume, pci_dev);
> + pci_pm_default_resume(pci_dev);
>
> if (pm && pm->runtime_resume)
> rc = pm->runtime_resume(dev);
>
next prev parent reply other threads:[~2019-10-15 17:21 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-14 23:00 [PATCH v3 0/7] PCI: PM: Move to D0 before calling pci_legacy_resume_early() Bjorn Helgaas
2019-10-14 23:00 ` [PATCH 1/7] PCI/PM: Always return devices to D0 when thawing Bjorn Helgaas
2019-10-15 17:15 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 2/7] PCI/PM: Correct pci_pm_thaw_noirq() documentation Bjorn Helgaas
2019-10-15 17:17 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 3/7] PCI/PM: Clear PCIe PME Status even for legacy power management Bjorn Helgaas
2019-10-15 17:20 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 4/7] PCI/PM: Run resume fixups before disabling wakeup events Bjorn Helgaas
2019-10-15 17:21 ` Rafael J. Wysocki [this message]
2019-10-14 23:00 ` [PATCH 5/7] PCI/PM: Make power management op coding style consistent Bjorn Helgaas
2019-10-15 17:22 ` Rafael J. Wysocki
2019-10-16 13:50 ` Dan Carpenter
2019-10-14 23:00 ` [PATCH 6/7] PCI/PM: Wrap long lines in documentation Bjorn Helgaas
2019-10-15 17:23 ` Rafael J. Wysocki
2019-10-14 23:00 ` [PATCH 7/7] PCI/MSI: Move power state check out of pci_msi_supported() Bjorn Helgaas
2019-10-15 17:24 ` Rafael J. Wysocki
2019-10-15 18:24 ` [PATCH v3 0/7] PCI: PM: Move to D0 before calling pci_legacy_resume_early() Dexuan Cui
2019-10-15 18:42 ` Bjorn Helgaas
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