1 files changed, 21 insertions, 1 deletions

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index cc0502bbb9ff..ebbb9f061c87 100644
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -4462,7 +4462,27 @@ static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
 
         pci_disable_device(pdev);
 
-        pci_set_power_state(pdev, pci_choose_state(pdev, state));
+        /*
+         * The pci-e switch on some quad port adapters will report a
+         * correctable error when the MAC transitions from D0 to D3.  To
+         * prevent this we need to mask off the correctable errors on the
+         * downstream port of the pci-e switch.
+         */
+        if (adapter->flags & FLAG_IS_QUAD_PORT) {
+                struct pci_dev *us_dev = pdev->bus->self;
+                int pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
+                u16 devctl;
+
+                pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
+                pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
+                                      (devctl & ~PCI_EXP_DEVCTL_CERE));
+
+                pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+                pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
+        } else {
+                pci_set_power_state(pdev, pci_choose_state(pdev, state));
+        }
 
         return 0;
 }