8139too: Fall back to PIO when MMIO fails.

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

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/net/8139too.c b/drivers/net/8139too.c
index f62ac64e98f..8a5b0d293f7 100644
--- a/drivers/net/8139too.c
+++ b/drivers/net/8139too.c
@@ -788,6 +788,7 @@ static int __devinit rtl8139_init_board (struct pci_dev *pdev,
         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)) {
@@ -836,9 +837,10 @@ static int __devinit rtl8139_init_board (struct pci_dev *pdev,
                 /* 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;