diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 33f3f475e5c6..75b7f2c8d911 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -827,6 +827,10 @@ static int pci_pm_suspend_noirq(struct device *dev) } } + /* if d3hot is not supported bail out */ + if (pci_dev->no_d3hot) + return 0; + if (!pci_dev->state_saved) { pci_save_state(pci_dev); if (pci_power_manageable(pci_dev)) @@ -883,7 +887,8 @@ static int pci_pm_resume_noirq(struct device *dev) if (dev_pm_smart_suspend_and_suspended(dev)) pm_runtime_set_active(dev); - pci_pm_default_resume_early(pci_dev); + if (!pci_dev->no_d3hot) + pci_pm_default_resume_early(pci_dev); if (pci_has_legacy_pm_support(pci_dev)) return pci_legacy_resume_early(dev); @@ -1281,6 +1286,10 @@ static int pci_pm_runtime_suspend(struct device *dev) return 0; } + /* if d3hot is not supported bail out */ + if (pci_dev->no_d3hot) + return 0; + if (!pci_dev->state_saved) { pci_save_state(pci_dev); pci_finish_runtime_suspend(pci_dev); @@ -1295,6 +1304,10 @@ static int pci_pm_runtime_resume(struct device *dev) struct pci_dev *pci_dev = to_pci_dev(dev); const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + /* we skipped d3hot processing so skip re-init */ + if (pci_dev->no_d3hot) + goto skip_restore; + /* * Restoring config space is necessary even if the device is not bound * to a driver because although we left it in D0, it may have gone to @@ -1309,6 +1322,7 @@ static int pci_pm_runtime_resume(struct device *dev) pci_enable_wake(pci_dev, PCI_D0, false); pci_fixup_device(pci_fixup_resume, pci_dev); +skip_restore: if (pm && pm->runtime_resume) rc = pm->runtime_resume(dev); diff --git a/include/linux/pci.h b/include/linux/pci.h index 6925828f9f25..61bfac3ff9af 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -333,6 +333,7 @@ struct pci_dev { unsigned int d2_support:1; /* Low power state D2 is supported */ unsigned int no_d1d2:1; /* D1 and D2 are forbidden */ unsigned int no_d3cold:1; /* D3cold is forbidden */ + unsigned int no_d3hot:1; /* D3hot is forbidden */ unsigned int bridge_d3:1; /* Allow D3 for bridge */ unsigned int d3cold_allowed:1; /* D3cold is allowed by user */ unsigned int mmio_always_on:1; /* Disallow turning off io/mem