[AGPGART] Don't waffle about unsupported serverworks chipsets if they don't do AGP.

From: Matt Domsch
Signed-off-by: Dave Jones <davej@redhat.com>

drivers/char/agp/sworks-agp.c

@@ -447,6 +447,7 @@ static int __devinit agp_serverworks_probe(struct pci_dev *pdev,
 	struct agp_bridge_data *bridge;
 	struct pci_dev *bridge_dev;
 	u32 temp, temp2;
+	u8 cap_ptr = 0;
 
 	/* Everything is on func 1 here so we are hardcoding function one */
 	bridge_dev = pci_find_slot((unsigned int)pdev->bus->number,
@@ -457,6 +458,8 @@ static int __devinit agp_serverworks_probe(struct pci_dev *pdev,
 		return -ENODEV;
 	}
 
+	cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
+
 	switch (pdev->device) {
 	case 0x0006:
 		/* ServerWorks CNB20HE
@@ -470,6 +473,7 @@ static int __devinit agp_serverworks_probe(struct pci_dev *pdev,
 		break;
 
 	default:
+		if (cap_ptr)
 			printk(KERN_ERR PFX "Unsupported Serverworks chipset "
 					"(device id: %04x)\n", pdev->device);
 		return -ENODEV;