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8139too: Fall back to PIO when MMIO fails.
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Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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Dave Jones authored and Jeff Garzik committed Jul 22, 2008
1 parent 152151d commit 1a4dc68
Showing 1 changed file with 5 additions and 3 deletions.
8 changes: 5 additions & 3 deletions drivers/net/8139too.c
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Original file line number Diff line number Diff line change
Expand Up @@ -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)) {
Expand Down Expand Up @@ -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;
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