---

yaml --- r: 121976 b: refs/heads/master c: 005cbdf h: refs/heads/master v: v3
git-mirror · Nov 22, 2008 · e0bcfdf · e0bcfdf
1 parent 688492f
commit e0bcfdf
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Showing 2 changed files with 22 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7e3aab4a9cd7d37f80eee75bebb6a71347f82476
+refs/heads/master: 005cbdfc29cfc23b8faadd3619eed43e6550bfc1
diff --git a/trunk/drivers/net/e1000e/netdev.c b/trunk/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;
 }