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Date:   Tue, 23 Apr 2019 15:18:40 -0500
From:   Jesse Hathaway <jesse@...ki-mvuki.org>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     Bjorn Helgaas <helgaas@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org
Subject: Re: Regression causes a hang on boot with a Comtrol PCI card

On Tue, Apr 16, 2019 at 10:00 AM Alan Stern <stern@...land.harvard.edu> wrote:
> Whatever the source of the problem, I don't think you're going to find
> it by looking at the USB code.  Perhaps the early initialization of the
> functions that _are_ present on the Comtrol card somehow messes up
> other parts of the system.

Thanks for all you help Alan,

I think at this point my Linux kernel debugging knowledge has run
aground. I would
love to crack this nut, but I doubt that will be possible with my
current knowledge base.
For now I am going to run the patched kernel even if I don't
understand precisely why
they prevent the box from hanging on boot when the Comtrol card is present.

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