linux-kernel - Re: [v3.9] [v3.10] [Regression] serial: 8250_pci: add support for another kind of NetMos Technology PCI 9835 Multi-I/O Controller

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Date:	Mon, 1 Jul 2013 09:27:51 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Joseph Salisbury <joseph.salisbury@...onical.com>
Cc:	udknight@...il.com, jslaby@...e.cz, alan@...ux.intel.com,
	matts@...mtech-fastcom.com, wfp5p@...ginia.edu,
	tklauser@...tanz.ch, linux-serial@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [v3.9] [v3.10] [Regression]  serial: 8250_pci: add support for
 another kind of NetMos Technology PCI 9835 Multi-I/O Controller

On Mon, Jul 01, 2013 at 12:14:45PM -0400, Joseph Salisbury wrote:
> Hi Wang,
> 
> A bug was opened against the Ubuntu kernel[0].  After a kernel bisect,
> it was found that reverting the following commit resolved this bug:
> 
> commit 8d2f8cd424ca0b99001f3ff4f5db87c4e525f366
> Author: Wang YanQing <udknight@...il.com>
> Date:   Fri Mar 1 11:47:20 2013 +0800
> 
>     serial: 8250_pci: add support for another kind of NetMos Technology
> PCI 9835 Multi-I/O Controller
> 
> 
> The regression was introduced as of v3.9-rc3 and still exists in the
> current Mainline tree.  It was also propagated to the stable trees.
> 
> The patch causes the device to use the serial module instead of
> parport_serial.  Maybe the the quirk in ~drivers/pci/quirks.c
> quirk_netmos() needs to be modified?
> 
> I see that you are the author of this patch, so I wanted to run this by
> you.  I was thinking of requesting a revert, but I wanted to get your
> feedback first.

You missed the conversation we had about this already this weekend :)

The offending patch has already been reverted and will propagate to the
stable trees soon.

thanks,

greg k-h
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