diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 4297a8d69..8bfada484 100755
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -654,6 +654,11 @@ MODULE_PARM_DESC(mobile_lpm_policy, "Default LPM policy for mobile chipsets");
 static void ahci_pci_save_initial_config(struct pci_dev *pdev,
 					 struct ahci_host_priv *hpriv)
 {
+	if (pdev->vendor == PCI_VENDOR_ID_ASMEDIA && pdev->device == 0x1166) {
+		dev_info(&pdev->dev, "ASM1166 has only six ports\n");
+		hpriv->saved_port_map = 0x3f;
+	}
+
 	if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361) {
 		dev_info(&pdev->dev, "JMB361 has only one port\n");
 		hpriv->force_port_map = 1;