linux-kernel - 2.6.25 -- long standing bug with usb after resume with 4GB ram

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Message-ID: <20080313110141.GA4329@elf.ucw.cz>
Date:	Thu, 13 Mar 2008 12:01:41 +0100
From:	Pavel Machek <pavel@....cz>
To:	kernel list <linux-kernel@...r.kernel.org>,
	Greg KH <greg@...ah.com>
Cc:	stern@...land.harvard.edu, linux-usb@...r.kernel.org,
	oliver@...kum.name
Subject: 2.6.25 -- long standing bug with usb after resume with 4GB ram

Hi!

There are problems with usb after suspend/resume... it works as long
as memory is limited to 3G -- probably because iommu/agpgart/something
is not used in such case.

rmmod/insmod of ehci_hcd & ohci_hcd fixes that.

For testing with 2.6.25, you'll need aperture_64.c patch that makes
iommu as nosave (or it oopses).

Problem is also present in opensuse10.3.
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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