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| author | Huang Ying <ying.huang@intel.com> | 2012-10-24 14:54:14 +0800 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2012-11-02 16:57:18 -0600 |
| commit | 3ff2de9ba1a2e22e548979dbcd46e999b22c93d8 (patch) | |
| tree | 1ef3bf252f317b6943654f36c985c8e32583e089 /drivers/pci/pci-driver.c | |
| parent | 90b5c1d7c45eeb622302680ff96ed30c1a2b6f0e (diff) | |
| download | lwn-3ff2de9ba1a2e22e548979dbcd46e999b22c93d8.tar.gz lwn-3ff2de9ba1a2e22e548979dbcd46e999b22c93d8.zip | |
PCI/PM: Resume device before shutdown
Some actions during shutdown need device to be in D0 state, such as
MSI shutdown etc, so resume device before shutdown.
Without this patch, a device may not be enumerated after a kexec
because the corresponding bridge is not in D0, so that
configuration space of the device is not accessible.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
CC: stable@vger.kernel.org # v3.6+
Diffstat (limited to 'drivers/pci/pci-driver.c')
| -rw-r--r-- | drivers/pci/pci-driver.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 94c6e2aa03d6..6c94fc9489e7 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -398,6 +398,8 @@ static void pci_device_shutdown(struct device *dev) 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 device *dev) * 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 |