[PATCH 2/2] pciehp: wait 100 ms after Link Training check

[Kenji Kaneshige]

If the port supports Link speeds greater than 5.0 GT/s, we must wait
for 100 ms after Link training completes before sending configuration
request.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx>
---
 drivers/pci/hotplug/pciehp_hpc.c |    8 ++++++++
 1 file changed, 8 insertions(+)

Index: linux-3.1/drivers/pci/hotplug/pciehp_hpc.c
===================================================================
--- linux-3.1.orig/drivers/pci/hotplug/pciehp_hpc.c
+++ linux-3.1/drivers/pci/hotplug/pciehp_hpc.c
@@ -302,6 +302,14 @@ int pciehp_check_link_status(struct cont
 		return retval;
 	}
 
+	/*
+	 * If the port supports Link speeds greater than 5.0 GT/s, we
+	 * must wait for 100 ms after Link training completes before
+	 * sending configuration request.
+	 */
+	if (ctrl->pcie->port->subordinate->max_bus_speed > PCIE_SPEED_5_0GT)
+		msleep(100);
+
 	pcie_update_link_speed(ctrl->pcie->port->subordinate, lnk_status);
 
 	return retval;
--
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