linux-kernel - Re: [PATCH] tty/8250_pnp: serial port detection regression since v3.7

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Date:	Wed, 06 Mar 2013 15:42:29 +0100
From:	Vincent Deffontaines <vincent@...zor.com>
To:	Sean Young <sean@...s.org>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>, <linux-serial@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Alan Cox <alan@...ux.intel.com>,
	<stable@...r.kernel.org>
Subject: Re: [PATCH] tty/8250_pnp: serial port detection regression since v3.7

Le 2013-03-04 14:28, Sean Young a écrit :
> Greg,
>
> On Fri, Feb 22, 2013 at 04:27:19PM +0000, Sean Young wrote:
>> The InsydeH2O BIOS (version dated 09/12/2011) has the following in
>> its pnp resouces for its serial ports:
>>
>> $ cat /sys/bus/pnp/devices/00:0b/resources
>> state = active
>> io disabled
>> irq disabled
>>
>> We do not check if the resources are disabled, and create a bogus
>> ttyS* device. Since commit 835d844d1a28e (8250_pnp: do pnp probe
>> before legacy probe) we get a bogus ttyS0, which prevents the legacy
>> probe from detecting it.
>
> Would you mind accepting this patch please -- it fixes a regression I
> introduced in 3.7.


Hi Sean,

Thanks for the patch, and thanks for re-pushing it :)
This is to inform you that the BIOS update referenced :
Version: SC24 BIOS V1.01
Release Date: 01/11/2013

Seems to fix "my" tty detection problem on 3.7 (tested on a 3.7.6 
Fedora kernel, with success).
I don't think the patch will hurt anyway - I believe it still will 
prevent other users from a regression.
I also confirm that the patched 3.8.0 detects its ttys fine on a 
BIOS-updated system.

Regards,

Vincent


--
Stop chasing shadows, just enjoy the ride
Morcheeba

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