[PATCH 7/7] PCI / PM: Use SMART_SUSPEND and LEAVE_SUSPENDED flags for PCIe ports

Rafael J. Wysocki
2018-01-03T00:40:41Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Make the PCIe port driver set DPM_FLAG_SMART_SUSPEND and
DPM_FLAG_LEAVE_SUSPENDED for the devices handled by it to benefit
from the opportunistic optimizations in the PCI layer enabled by
these flags.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/pci/pcie/portdrv_pci.c | 3 +++
1 file changed, 3 insertions(+)

Index: linux-pm/drivers/pci/pcie/portdrv_pci.c
===================================================================
--- linux-pm.orig/drivers/pci/pcie/portdrv_pci.c
+++ linux-pm/drivers/pci/pcie/portdrv_pci.c
@@ -150,6 +150,9 @@ static int pcie_portdrv_probe(struct pci

pci_save_state(dev);

+ dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_SMART_SUSPEND |
+ DPM_FLAG_LEAVE_SUSPENDED);
+
if (pci_bridge_d3_possible(dev)) {
/*
* Keep the port resumed 100ms to make sure things like