Re: Interesting tidbit: NetMos 9835 card, IRQ, and ACPI

[Bjorn Helgaas <bjorn.helgaas@hp.com>]

On Thursday 24 March 2005 12:54 pm, Michael Tokarev wrote:
> Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing enabled
> ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> ACPI: PCI interrupt 0000:01:00.0[A] -> GSI 18 (level, low) -> IRQ 193
> ttyS4 at I/O 0xa400 (irq = 193) is a 16550A
> ttyS5 at I/O 0xa000 (irq = 193) is a 16550A
> 
> And oh.. now the ports are at ttyS[45], I used for them
> to be at ttyS[23]... Oh well...

Someday maybe we should make serial rely on PNP, and only
use the compiled-in table when PNP isn't available or is
turned off.  Then ports would just be numbered sequentially
as they're discovered.  And it would also help with the
current situation where ttyS0/1 are often discovered two
or three times.

> The patch does not apply to 2.6.11 - several hunks, notable
> all the parport stuff, fails.  I'll dig into this a bit
> later today (hopefully).  8250 changes are enouth for the
> serial port to work, parallel port still does not work --
> without the missing patch hunks.

My patch was against the -mm tree, and I think one of the
differences between 2.5.11 and the -mm tree was the
removal of 9835 from parport_pc.  Sounds like you've
figured that out already :-)