diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index e12f579..dcb6d4f 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -1717,41 +1717,92 @@
 	.agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 };
 
-static int find_i810(u16 device)
+
+static int find_gmch(u16 device)
 {
-	struct pci_dev *i810_dev;
+	struct pci_dev *gmch_device;
 
-	i810_dev = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL);
-	if (!i810_dev)
-		return 0;
-	intel_private.pcidev = i810_dev;
-	return 1;
-}
-
-static int find_i830(u16 device)
-{
-	struct pci_dev *i830_dev;
-
-	i830_dev = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL);
-	if (i830_dev && PCI_FUNC(i830_dev->devfn) != 0) {
-		i830_dev = pci_get_device(PCI_VENDOR_ID_INTEL,
-				device, i830_dev);
+	gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL, device, NULL);
+	if (gmch_device && PCI_FUNC(gmch_device->devfn) != 0) {
+		gmch_device = pci_get_device(PCI_VENDOR_ID_INTEL,
+                                device, gmch_device);
 	}
 
-	if (!i830_dev)
+	if (!gmch_device)
 		return 0;
 
-	intel_private.pcidev = i830_dev;
+	intel_private.pcidev = gmch_device;
 	return 1;
 }
 
+/* Table to describe Intel GMCH and AGP/PCIE GART drivers.  At least one of
+ * driver and gmch_driver must be non-null, and find_gmch will determine
+ * which one should be used if a gmch_chip_id is present.
+ */
+static const struct intel_driver_description {
+	unsigned int chip_id;
+	unsigned int gmch_chip_id;
+	char *name;
+	const struct agp_bridge_driver *driver;
+	const struct agp_bridge_driver *gmch_driver;
+} intel_agp_chipsets[] = {
+	{ PCI_DEVICE_ID_INTEL_82443LX_0, 0, "440LX", &intel_generic_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82443BX_0, 0, "440BX", &intel_generic_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82443GX_0, 0, "440GX", &intel_generic_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82810_MC1, PCI_DEVICE_ID_INTEL_82810_IG1, "i810",
+		NULL, &intel_810_driver },
+	{ PCI_DEVICE_ID_INTEL_82810_MC3, PCI_DEVICE_ID_INTEL_82810_IG3, "i810",
+		NULL, &intel_810_driver },
+	{ PCI_DEVICE_ID_INTEL_82810E_MC, PCI_DEVICE_ID_INTEL_82810E_IG, "i810",
+		NULL, &intel_810_driver },
+	{ PCI_DEVICE_ID_INTEL_82815_MC, PCI_DEVICE_ID_INTEL_82815_CGC, "i815",
+		&intel_810_driver, &intel_815_driver },
+	{ PCI_DEVICE_ID_INTEL_82820_HB, 0, "i820", &intel_820_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82820_UP_HB, 0, "i820", &intel_820_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82830_HB, PCI_DEVICE_ID_INTEL_82830_CGC, "830M",
+		&intel_830mp_driver, &intel_830_driver },
+	{ PCI_DEVICE_ID_INTEL_82840_HB, 0, "i840", &intel_840_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82845_HB, 0, "845G", &intel_845_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82845G_HB, PCI_DEVICE_ID_INTEL_82845G_IG, "830M",
+		&intel_845_driver, &intel_830_driver },
+	{ PCI_DEVICE_ID_INTEL_82850_HB, 0, "i850", &intel_850_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82855PM_HB, 0, "855PM", &intel_845_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82855GM_HB, PCI_DEVICE_ID_INTEL_82855GM_IG, "855GM",
+		&intel_845_driver, &intel_830_driver },
+	{ PCI_DEVICE_ID_INTEL_82860_HB, 0, "i860", &intel_860_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82865_HB, PCI_DEVICE_ID_INTEL_82865_IG, "865",
+		&intel_845_driver, &intel_830_driver },
+	{ PCI_DEVICE_ID_INTEL_82875_HB, 0, "i875", &intel_845_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_82915G_HB, PCI_DEVICE_ID_INTEL_82915G_IG, "915G",
+		&intel_845_driver, &intel_915_driver },
+	{ PCI_DEVICE_ID_INTEL_82915GM_HB, PCI_DEVICE_ID_INTEL_82915GM_IG, "915GM",
+		&intel_845_driver, &intel_915_driver },
+	{ PCI_DEVICE_ID_INTEL_82945G_HB, PCI_DEVICE_ID_INTEL_82945G_IG, "945G",
+		&intel_845_driver, &intel_915_driver },
+	{ PCI_DEVICE_ID_INTEL_82945GM_HB, PCI_DEVICE_ID_INTEL_82945GM_IG, "945GM",
+		&intel_845_driver, &intel_915_driver },
+	{ PCI_DEVICE_ID_INTEL_82946GZ_HB, PCI_DEVICE_ID_INTEL_82946GZ_IG, "946GZ",
+		&intel_845_driver, &intel_i965_driver },
+	{ PCI_DEVICE_ID_INTEL_82965G_1_HB, PCI_DEVICE_ID_INTEL_82965G_1_IG, "965G",
+		&intel_845_driver, &intel_i965_driver },
+	{ PCI_DEVICE_ID_INTEL_82965Q_HB, PCI_DEVICE_ID_INTEL_82965Q_IG, "965Q",
+		&intel_845_driver, &intel_i965_driver },
+	{ PCI_DEVICE_ID_INTEL_82965G_HB, PCI_DEVICE_ID_INTEL_82965G_IG, "965G",
+		&intel_845_driver, &intel_i965_driver },
+	{ PCI_DEVICE_ID_INTEL_82965GM_HB, PCI_DEVICE_ID_INTEL_82965GM_IG, "965GM",
+		&intel_845_driver, &intel_i965_driver },
+	{ PCI_DEVICE_ID_INTEL_7505_0, 0, "E7505", &intel_7505_driver, NULL },
+	{ PCI_DEVICE_ID_INTEL_7205_0, 0, "E7205", &intel_7505_driver, NULL },
+	{ 0, 0, NULL, NULL, NULL }
+};
+
 static int __devinit agp_intel_probe(struct pci_dev *pdev,
 				     const struct pci_device_id *ent)
 {
 	struct agp_bridge_data *bridge;
-	char *name = "(unknown)";
 	u8 cap_ptr = 0;
 	struct resource *r;
+	int i;
 
 	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 
@@ -1759,191 +1810,42 @@
 	if (!bridge)
 		return -ENOMEM;
 
-	switch (pdev->device) {
-	case PCI_DEVICE_ID_INTEL_82443LX_0:
-		bridge->driver = &intel_generic_driver;
-		name = "440LX";
-		break;
-	case PCI_DEVICE_ID_INTEL_82443BX_0:
-		bridge->driver = &intel_generic_driver;
-		name = "440BX";
-		break;
-	case PCI_DEVICE_ID_INTEL_82443GX_0:
-		bridge->driver = &intel_generic_driver;
-		name = "440GX";
-		break;
-	case PCI_DEVICE_ID_INTEL_82810_MC1:
-		name = "i810";
-		if (!find_i810(PCI_DEVICE_ID_INTEL_82810_IG1))
-			goto fail;
-		bridge->driver = &intel_810_driver;
-		break;
-	case PCI_DEVICE_ID_INTEL_82810_MC3:
-		name = "i810 DC100";
-		if (!find_i810(PCI_DEVICE_ID_INTEL_82810_IG3))
-			goto fail;
-		bridge->driver = &intel_810_driver;
-		break;
-	case PCI_DEVICE_ID_INTEL_82810E_MC:
-		name = "i810 E";
-		if (!find_i810(PCI_DEVICE_ID_INTEL_82810E_IG))
-			goto fail;
-		bridge->driver = &intel_810_driver;
-		break;
-	 case PCI_DEVICE_ID_INTEL_82815_MC:
-		/*
-		 * The i815 can operate either as an i810 style
-		 * integrated device, or as an AGP4X motherboard.
-		 */
-		if (find_i810(PCI_DEVICE_ID_INTEL_82815_CGC))
-			bridge->driver = &intel_810_driver;
-		else
-			bridge->driver = &intel_815_driver;
-		name = "i815";
-		break;
-	case PCI_DEVICE_ID_INTEL_82820_HB:
-	case PCI_DEVICE_ID_INTEL_82820_UP_HB:
-		bridge->driver = &intel_820_driver;
-		name = "i820";
-		break;
-	case PCI_DEVICE_ID_INTEL_82830_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82830_CGC))
-			bridge->driver = &intel_830_driver;
-		else
-			bridge->driver = &intel_830mp_driver;
-		name = "830M";
-		break;
-	case PCI_DEVICE_ID_INTEL_82840_HB:
-		bridge->driver = &intel_840_driver;
-		name = "i840";
-		break;
-	case PCI_DEVICE_ID_INTEL_82845_HB:
-		bridge->driver = &intel_845_driver;
-		name = "i845";
-		break;
-	case PCI_DEVICE_ID_INTEL_82845G_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82845G_IG))
-			bridge->driver = &intel_830_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "845G";
-		break;
-	case PCI_DEVICE_ID_INTEL_82850_HB:
-		bridge->driver = &intel_850_driver;
-		name = "i850";
-		break;
-	case PCI_DEVICE_ID_INTEL_82855PM_HB:
-		bridge->driver = &intel_845_driver;
-		name = "855PM";
-		break;
-	case PCI_DEVICE_ID_INTEL_82855GM_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82855GM_IG)) {
-			bridge->driver = &intel_830_driver;
-			name = "855";
-		} else {
-			bridge->driver = &intel_845_driver;
-			name = "855GM";
-		}
-		break;
-	case PCI_DEVICE_ID_INTEL_82860_HB:
-		bridge->driver = &intel_860_driver;
-		name = "i860";
-		break;
-	case PCI_DEVICE_ID_INTEL_82865_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82865_IG))
-			bridge->driver = &intel_830_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "865";
-		break;
-	case PCI_DEVICE_ID_INTEL_82875_HB:
-		bridge->driver = &intel_845_driver;
-		name = "i875";
-		break;
-	case PCI_DEVICE_ID_INTEL_82915G_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82915G_IG))
-			bridge->driver = &intel_915_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "915G";
-		break;
-	case PCI_DEVICE_ID_INTEL_82915GM_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82915GM_IG))
-			bridge->driver = &intel_915_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "915GM";
-		break;
-	case PCI_DEVICE_ID_INTEL_82945G_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82945G_IG))
-			bridge->driver = &intel_915_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "945G";
-		break;
-	case PCI_DEVICE_ID_INTEL_82945GM_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82945GM_IG))
-			bridge->driver = &intel_915_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "945GM";
-		break;
-	case PCI_DEVICE_ID_INTEL_82946GZ_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82946GZ_IG))
-			bridge->driver = &intel_i965_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "946GZ";
-		break;
-	case PCI_DEVICE_ID_INTEL_82965G_1_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82965G_1_IG))
-			bridge->driver = &intel_i965_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "965G";
-		break;
-	case PCI_DEVICE_ID_INTEL_82965Q_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82965Q_IG))
-			bridge->driver = &intel_i965_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "965Q";
-		break;
-	case PCI_DEVICE_ID_INTEL_82965G_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82965G_IG))
-			bridge->driver = &intel_i965_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "965G";
-		break;
-	case PCI_DEVICE_ID_INTEL_82965GM_HB:
-		if (find_i830(PCI_DEVICE_ID_INTEL_82965GM_IG))
-			bridge->driver = &intel_i965_driver;
-		else
-			bridge->driver = &intel_845_driver;
-		name = "965GM";
-		break;
-	case PCI_DEVICE_ID_INTEL_7505_0:
-		bridge->driver = &intel_7505_driver;
-		name = "E7505";
-		break;
-	case PCI_DEVICE_ID_INTEL_7205_0:
-		bridge->driver = &intel_7505_driver;
-		name = "E7205";
-		break;
-	default:
+	for (i = 0; intel_agp_chipsets[i].name != NULL; i++) {
+		/* In case that multiple models of gfx chip may
+		   stand on same host bridge type, this can be
+		   sure we detect the right IGD. */
+		if ((pdev->device == intel_agp_chipsets[i].chip_id) &&
+			((intel_agp_chipsets[i].gmch_chip_id == 0) ||
+				find_gmch(intel_agp_chipsets[i].gmch_chip_id)))
+			break;
+	}
+
+	if (intel_agp_chipsets[i].name == NULL) {
 		if (cap_ptr)
-			printk(KERN_WARNING PFX "Unsupported Intel chipset (device id: %04x)\n",
-			    pdev->device);
+			printk(KERN_WARNING PFX "Unsupported Intel chipset"
+                               "(device id: %04x)\n", pdev->device);
 		agp_put_bridge(bridge);
 		return -ENODEV;
-	};
+	}
+
+	if (intel_agp_chipsets[i].gmch_chip_id != 0)
+	    bridge->driver = intel_agp_chipsets[i].gmch_driver;
+	else
+	    bridge->driver = intel_agp_chipsets[i].driver;
+
+	if (bridge->driver == NULL) {
+		printk(KERN_WARNING PFX "Failed to find bridge device "
+			"(chip_id: %04x)\n", intel_agp_chipsets[i].gmch_chip_id);
+		agp_put_bridge(bridge);
+		return -ENODEV;
+        }
 
 	bridge->dev = pdev;
 	bridge->capndx = cap_ptr;
 	bridge->dev_private_data = &intel_private;
 
-	printk(KERN_INFO PFX "Detected an Intel %s Chipset.\n", name);
+	printk(KERN_INFO PFX "Detected an Intel %s Chipset.\n",
+		intel_agp_chipsets[i].name);
 
 	/*
 	* The following fixes the case where the BIOS has "forgotten" to
@@ -1979,12 +1881,6 @@
 
 	pci_set_drvdata(pdev, bridge);
 	return agp_add_bridge(bridge);
-
-fail:
-	printk(KERN_ERR PFX "Detected an Intel %s chipset, "
-		"but could not find the secondary device.\n", name);
-	agp_put_bridge(bridge);
-	return -ENODEV;
 }
 
 static void __devexit agp_intel_remove(struct pci_dev *pdev)