netdev - [2/3] 8139too: Force usage of PIO on OQO2

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Message-Id: <200807152354.m6FNsre3026948@gelk.kernelslacker.org>
Date:	Tue, 15 Jul 2008 19:54:53 -0400
From:	Dave Jones <davej@...hat.com>
To:	netdev@...r.kernel.org
Subject: [2/3] 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@...hat.com>

--- linux-2.6.25.noarch/drivers/net/8139too.c~	2008-05-28 21:07:36.000000000 -0400
+++ linux-2.6.25.noarch/drivers/net/8139too.c	2008-05-28 21:19:57.000000000 -0400
@@ -951,6 +951,14 @@ static int __devinit rtl8139_init_one (s
 			   "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;
--
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