Re: PNP parallel&serial ports: module reload fails (2.6.11)?

Dmitry Torokhov
2005-06-10T16:20:52Z

On 6/10/05, Bjorn Helgaas <bjorn.helgaas@hp.com> wrote:
> On Thursday 09 June 2005 3:16 pm, Russell King wrote:
> > The reason that 8250 first detects your ports is that they're found
> > via the legacy method which is independent of PnP. As you correctly
> > sumise, when you unload 8250_pnp, it disables the device so when you
> > re-load 8250, it's unable to detect your ports using the legacy method.
> >
> > But the legacy method needs to continue to exist for systems which
> > don't have PnP enabled.
>
> But shouldn't we someday move the legacy probing from 8250
> into an 8250_platform and only do it if we don't have 8250_pnp?
>

Given how much pain PNP/ACPI probing of i8042 was causing to everyone
I'd be cautious. BIOS writers are extremely creative. Maybe ia64 only
while x86 should default to legacy probing.

--
Dmitry