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SubjectRe: Why does printk helps PCMCIA card to initialise?
On Sun, Feb 20, 2005 at 12:44:25PM +0100, Martin Drohmann wrote:
> #ifdef CONFIG_PCI
> if (s->cb_dev) {
> ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
> min, 0, pcmcia_align, &data);
> } else
> #endif
> - printk("This line will never be printed, but it helps!!!");

If you added this, you've done much more than just adding it. Look
two lines above and realise that you've just changed what the "else"
clause conditionalises.

> ret = allocate_resource(&ioport_resource, res, num, min,
> ~0UL,
> 1, pcmcia_align, &data);

So, with your printk in place, we try pci_bus_alloc_resource. If that
succeeds or fails, we completely stomp on that with allocate_resource.
Bad. Very bad.

The first thing that needs solving is why you're getting the "odd IO
request" crap. That may explain why the resource can't be allocated.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/
maintainer of: 2.6 PCMCIA - http://pcmcia.arm.linux.org.uk/
2.6 Serial core
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