netdev - [3/3] 8139too: Fall back to PIO when MMIO fails.

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Message-Id: <200807152354.m6FNsqCd026936@gelk.kernelslacker.org>
Date:	Tue, 15 Jul 2008 19:54:52 -0400
From:	Dave Jones <davej@...hat.com>
To:	netdev@...r.kernel.org
Subject: [3/3] 8139too: Fall back to PIO when MMIO fails.

Signed-off-by: Dave Jones <davej@...hat.com>

--- linux-2.6.26.noarch/drivers/net/8139too.c~	2008-07-15 18:49:02.000000000 -0400
+++ linux-2.6.26.noarch/drivers/net/8139too.c	2008-07-15 18:53:07.000000000 -0400
@@ -784,6 +784,7 @@ static int __devinit rtl8139_init_board 
 	DPRINTK("PIO region size == 0x%02X\n", pio_len);
 	DPRINTK("MMIO region size == 0x%02lX\n", mmio_len);
 
+retry:
 	if (use_io) {
 		/* make sure PCI base addr 0 is PIO */
 		if (!(pio_flags & IORESOURCE_IO)) {
@@ -832,9 +833,10 @@ static int __devinit rtl8139_init_board 
 		/* ioremap MMIO region */
 		ioaddr = pci_iomap(pdev, 1, 0);
 		if (ioaddr == NULL) {
-			dev_err(&pdev->dev, "cannot remap MMIO, aborting\n");
-			rc = -EIO;
-			goto err_out;
+			dev_err(&pdev->dev, "cannot remap MMIO, trying PIO\n");
+			pci_release_regions(pdev);
+			use_io = 1;
+			goto retry;
 		}
 		dev->base_addr = (long) ioaddr;
 		tp->regs_len = mmio_len;
--
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