linux-kernel - Re: [BUG] No ttyS0 - Strange udev 8250

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Message-ID: <ac3eb2510910071415k5f6311d6y4d5119d16fbbc679@mail.gmail.com>
Date:	Wed, 7 Oct 2009 23:15:45 +0200
From:	Kay Sievers <kay.sievers@...y.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Michael Guntsche <mike@...loops.com>,
	Alan Jenkins <sourcejedi.lkml@...glemail.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-hotplug <linux-hotplug@...r.kernel.org>
Subject: Re: [BUG] No ttyS0 - Strange udev 8250_pnp interaction

On Wed, Oct 7, 2009 at 23:10, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> On Wed, 7 Oct 2009 22:53:12 +0200
> Kay Sievers <kay.sievers@...y.org> wrote:
>
>> On Wed, Oct 7, 2009 at 22:31, Michael Guntsche <mike@...loops.com> wrote:
>> > add      /module/8250_pnp (module)
>> > remove /devices/platform/serial8250/tty/ttyS0 (tty)
>> > add      /devices/pnp0/00:05/tty/ttyS0 (tty)
>>
>> That's pretty odd, that the loading of a module removes pre-existing
>> devices created by other code, and creates new ones with the same name
>> and major/minor.
>
> Quite normal. The serial code has always done this.

Heh, I hope you don't tell people to look at floppy.c if they want to see
something "normal". :)

Kay
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