linux-kernel - Re: Serial ports rearranged in 2.6.22?

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Date:	Fri, 10 Aug 2007 21:54:02 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	"Bjorn Helgaas" <bjorn.helgaas@...com>
Subject: Re: Serial ports rearranged in 2.6.22?

On 8/10/07, Michael Mauch <michael.mauch@....de> wrote:
> Hi,
>
> until 2.6.21, I had the normal assignments for ttyS0 and ttyS1:
>
> 00:08: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> 00:09: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
>
> With 2.6.22 I get the names <-> ports/irqs the other way around:
>
> 00:08: ttyS0 at I/O 0x2f8 (irq = 3) is a 16550A
> 00:09: ttyS1 at I/O 0x3f8 (irq = 4) is a 16550A
>
> Is this supposed to be that way? Should we reassign these names with
> udev? udev-114 doesn't seem to have built-in rules to assign the
> traditional names.
>
> Or could it be related to some brokeness in my BIOS (ACPI/PNP)?
>
> I'm using the 8250_pnp module (and it's the same with builtin serial
> modules). I made sure that I did not accidentally change the BIOS
> settings for the serial ports.
>
> I'm using Gentoo, but on the lirc list was a Fedora user with the same
> symptoms.

http://lkml.org/lkml/2007/7/25/455

YH
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