forked from luck/tmp_suning_uos_patched
PCI PM: Simplify PCI wake-up code
Rework the PCI wake-up code so that it's easier to read without changing the functionality. Reviewed-by: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
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@ -111,12 +111,16 @@ static bool acpi_pci_can_wakeup(struct pci_dev *dev)
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static int acpi_pci_sleep_wake(struct pci_dev *dev, bool enable)
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{
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int error = acpi_pm_device_sleep_wake(&dev->dev, enable);
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int error;
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if (!acpi_pci_can_wakeup(dev))
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return 0;
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error = acpi_pm_device_sleep_wake(&dev->dev, enable);
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if (!error)
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dev_printk(KERN_INFO, &dev->dev,
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"wake-up capability %s by ACPI\n",
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dev_info(&dev->dev, "wake-up capability %s by ACPI\n",
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enable ? "enabled" : "disabled");
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return error;
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}
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@ -1220,8 +1220,7 @@ void pci_pme_active(struct pci_dev *dev, bool enable)
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*/
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int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
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{
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int error = 0;
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bool pme_done = false;
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int ret = 0;
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if (enable && !device_may_wakeup(&dev->dev))
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return -EINVAL;
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@ -1232,18 +1231,22 @@ int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable)
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* enable. To disable wake-up we call the platform first, for symmetry.
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*/
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if (!enable && platform_pci_can_wakeup(dev))
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error = platform_pci_sleep_wake(dev, false);
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if (enable) {
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int error;
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if (!enable || pci_pme_capable(dev, state)) {
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pci_pme_active(dev, enable);
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pme_done = true;
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if (pci_pme_capable(dev, state))
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pci_pme_active(dev, true);
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else
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ret = 1;
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error = platform_pci_sleep_wake(dev, true);
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if (ret)
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ret = error;
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} else {
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platform_pci_sleep_wake(dev, false);
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pci_pme_active(dev, false);
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}
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if (enable && platform_pci_can_wakeup(dev))
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error = platform_pci_sleep_wake(dev, true);
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return pme_done ? 0 : error;
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return ret;
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}
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/**
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