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

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Message-ID: <20091007221001.7628c9aa@lxorguk.ukuu.org.uk>
Date:	Wed, 7 Oct 2009 22:10:01 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Kay Sievers <kay.sievers@...y.org>
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, 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.
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