linux-kernel - Re: [34-stable regression] USB delay init quirk causes device events loss

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Message-ID: <Pine.LNX.4.44L0.1009131219490.1315-100000@iolanthe.rowland.org>
Date:	Mon, 13 Sep 2010 12:24:46 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Phil Dibowitz <phil@...m.com>
cc:	Greg KH <gregkh@...e.de>, Jiri Slaby <jslaby@...e.cz>,
	<stable@...nel.org>, USB list <linux-usb@...r.kernel.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: [34-stable regression] USB delay init quirk causes device events
 loss

On Mon, 13 Sep 2010, Phil Dibowitz wrote:

> Thanks for figuring this out Alan. I think this is reasonable. However, I
> think this also went into .32-stable and should probably be reverted there
> as well.

I think kernels earlier than .34 will be okay.  The changeover to the
runtime-PM framework occurred during the .33-.35 timeframe, and so .34
was in an intermediate state.

Jiri, as a workaround for people using the current 3.6.34.stable, you
can ask them to do:

	echo on >/sys/bus/usb/devices/.../power/level

with the "..." filled in appropriately.

> I'll advise my users to make sure they have at least .35.

That probably isn't necessary.

Alan Stern

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