From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kay Sievers <kay.sievers@vrfy.org>
Date: Wed, 07 Oct 2009 20:53:12 +0000
Subject: Re: [BUG] No ttyS0 - Strange udev 8250_pnp interaction
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To: Michael Guntsche <mike@it-loops.com>
Cc: Alan Jenkins <sourcejedi.lkml@googlemail.com>, linux-kernel <linux-kernel@vger.kernel.org>, linux-hotplug <linux-hotplug@vger.kernel.org>

On Wed, Oct 7, 2009 at 22:31, Michael Guntsche <mike@it-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.

As Alan mentioned, we could serialize events which carry the the same
major/minor number, that should work around such behavior.

Thanks,
Kay