On Tue, May 31, 2016 at 11:58:05AM +0300, Mika Westerberg wrote:

quoted

To summarize the next steps. I will send new version of the
PCI PM patches with following changes.

  - Drop this 50ms patch, we should have the PCIe 100ms delay already
    covered.

  - Increase runtime PM autosuspend time from 10ms to 500ms (or whatever
    is the prefered default).

I did some tests, turns out the autosuspend delay need not be increased
to prevent the Thunderbolt hotplug ports from suspending between
"enabling device" and loading the pciehp driver, however the following
is needed:

diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
index 7860ab3..1d1fb1c 100644
--- a/drivers/pci/pcie/portdrv_pci.c
+++ b/drivers/pci/pcie/portdrv_pci.c

@@ -238,6 +238,7 @@ static int pcie_portdrv_probe(struct pci_dev *dev,
 		pm_runtime_set_autosuspend_delay(&dev->dev, 10);
 		pm_runtime_use_autosuspend(&dev->dev);
 		pm_runtime_put_autosuspend(&dev->dev);
+		pm_runtime_mark_last_busy(&dev->dev);
 		pm_runtime_allow(&dev->dev);
 	}