1 files changed, 24 insertions, 5 deletions

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 81d19d5683ac..27c0e6eb7136 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -368,8 +368,9 @@ static void __devinit quirk_io_region(struct pci_dev *dev, unsigned region,
                 bus_region.end = res->end;
                 pcibios_bus_to_resource(dev, res, &bus_region);
 
-                pci_claim_resource(dev, nr);
-                dev_info(&dev->dev, "quirk: %pR claimed by %s\n", res, name);
+                if (pci_claim_resource(dev, nr) == 0)
+                        dev_info(&dev->dev, "quirk: %pR claimed by %s\n",
+                                 res, name);
         }
 }       
 
@@ -1977,11 +1978,25 @@ static void __devinit quirk_via_cx700_pci_parking_caching(struct pci_dev *dev)
         /*
          * Disable PCI Bus Parking and PCI Master read caching on CX700
          * which causes unspecified timing errors with a VT6212L on the PCI
-         * bus leading to USB2.0 packet loss. The defaults are that these
-         * features are turned off but some BIOSes turn them on.
+         * bus leading to USB2.0 packet loss.
+         *
+         * This quirk is only enabled if a second (on the external PCI bus)
+         * VT6212L is found -- the CX700 core itself also contains a USB
+         * host controller with the same PCI ID as the VT6212L.
          */
 
+        /* Count VT6212L instances */
+        struct pci_dev *p = pci_get_device(PCI_VENDOR_ID_VIA,
+                PCI_DEVICE_ID_VIA_8235_USB_2, NULL);
         uint8_t b;
+
+        /* p should contain the first (internal) VT6212L -- see if we have
+           an external one by searching again */
+        p = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8235_USB_2, p);
+        if (!p)
+                return;
+        pci_dev_put(p);
+
         if (pci_read_config_byte(dev, 0x76, &b) == 0) {
                 if (b & 0x40) {
                         /* Turn off PCI Bus Parking */
@@ -2008,7 +2023,7 @@ static void __devinit quirk_via_cx700_pci_parking_caching(struct pci_dev *dev)
                 }
         }
 }
-DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0x324e, quirk_via_cx700_pci_parking_caching);
 
 /*
  * For Broadcom 5706, 5708, 5709 rev. A nics, any read beyond the
@@ -2108,6 +2123,10 @@ static void __devinit quirk_disable_msi(struct pci_dev *dev)
         }
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8131_BRIDGE, quirk_disable_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AMD, 0x9602, quirk_disable_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ASUSTEK, 0x9602, quirk_disable_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_AI, 0x9602, quirk_disable_msi);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, 0xa238, quirk_disable_msi);
 
 /* Go through the list of Hypertransport capabilities and
  * return 1 if a HT MSI capability is found and enabled */