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path: root/drivers/pci/pcie/portdrv_pci.c
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Diffstat (limited to 'drivers/pci/pcie/portdrv_pci.c')
-rw-r--r--drivers/pci/pcie/portdrv_pci.c20
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