8139too: Force usage of PIO on OQO2

The OQO model 2 has an RTL8139 from Atheros that doesn't like MMIO.
It fails on modprobe, with a 'PCI Bus error' message.

Force it to always use polled IO.

Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/net/8139too.c b/drivers/net/8139too.c
index f172b5d822d7..f62ac64e98fe 100644
--- a/drivers/net/8139too.c
+++ b/drivers/net/8139too.c
@@ -949,6 +949,14 @@ static int __devinit rtl8139_init_one (struct pci_dev *pdev,
                            "Use the \"8139cp\" driver for improved performance and stability.\n");
         }
 
+        if (pdev->vendor == PCI_VENDOR_ID_REALTEK &&
+            pdev->device == PCI_DEVICE_ID_REALTEK_8139 &&
+            pdev->subsystem_vendor == PCI_VENDOR_ID_ATHEROS &&
+            pdev->subsystem_device == PCI_DEVICE_ID_REALTEK_8139) {
+                printk(KERN_INFO "8139too: OQO Model 2 detected. Forcing PIO\n");
+                use_io = 1;
+        }
+
         i = rtl8139_init_board (pdev, &dev);
         if (i < 0)
                 return i;