PCI: pciehp: Implement runtime PM callbacks

Basically we need to do the same thing when runtime suspending than with
system sleep so re-use those operations here. This makes sure hotplug
interrupt does not trigger immediately when the link goes down.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index df5ae02f4e12..fc5366b50e95 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -288,6 +288,22 @@ static int pciehp_resume(struct pcie_device *dev)
 
         return 0;
 }
+
+static int pciehp_runtime_resume(struct pcie_device *dev)
+{
+        struct controller *ctrl = get_service_data(dev);
+
+        /* pci_restore_state() just wrote to the Slot Control register */
+        ctrl->cmd_started = jiffies;
+        ctrl->cmd_busy = true;
+
+        /* clear spurious events from rediscovery of inserted card */
+        if ((ctrl->state == ON_STATE || ctrl->state == BLINKINGOFF_STATE) &&
+             pme_is_native(dev))
+                pcie_clear_hotplug_events(ctrl);
+
+        return pciehp_resume(dev);
+}
 #endif /* PM */
 
 static struct pcie_port_service_driver hpdriver_portdrv = {
@@ -302,6 +318,8 @@ static struct pcie_port_service_driver hpdriver_portdrv = {
         .suspend        = pciehp_suspend,
         .resume_noirq   = pciehp_resume_noirq,
         .resume         = pciehp_resume,
+        .runtime_suspend = pciehp_suspend,
+        .runtime_resume = pciehp_runtime_resume,
 #endif  /* PM */
 };