1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index d4824cb78b49..08c243ab034e 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c
@@ -134,10 +134,28 @@ static int pcie_port_runtime_resume(struct device *dev)
         return 0;
 }
 
+static int pci_dev_pme_poll(struct pci_dev *pdev, void *data)
+{
+        bool *pme_poll = data;
+
+        if (pdev->pme_poll)
+                *pme_poll = true;
+        return 0;
+}
+
 static int pcie_port_runtime_idle(struct device *dev)
 {
+        struct pci_dev *pdev = to_pci_dev(dev);
+        bool pme_poll = false;
+
+        /*
+         * If any subordinate device needs pme poll, we should keep
+         * the port in D0, because we need port in D0 to poll it.
+         */
+        pci_walk_bus(pdev->subordinate, pci_dev_pme_poll, &pme_poll);
         /* Delay for a short while to prevent too frequent suspend/resume */
-        pm_schedule_suspend(dev, 10);
+        if (!pme_poll)
+                pm_schedule_suspend(dev, 10);
         return -EBUSY;
 }
 #else