Comment 12 for bug 296710

"This patch (as1139) adds a warning to the system log whenever ehci-hcd
is loaded after ohci-hcd or uhci-hcd. Nowadays most distributions are
pretty good about not doing this; maybe the warning will help convince
anyone still doing it wrong."

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=9beeee6584b9aa4f9192055512411484a2a624df;hp=2b70f07343389cb474235def00b021a645ede916