Re: fix/workaround for usb probe lockups on nForce2 mbs

From: Brandon Fos*** (bfoz_at_terrandev.com)
Date: 09/26/03

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    Date: Thu, 25 Sep 2003 21:31:43 -0700
To: Andrew Atrens <atrens@nortelnetworks.com>

    Andrew Atrens wrote:
    >
    > All,
    >
    > The attached patch fixes the boot lockups I've been experiencing on my
    > nForce2 (A7N8X-Deluxe) motherboards when usb devices are on the bus at
    > boot time.
    >
    > Looks like something in usb_explore is (inadvertently?) enabling
    > interrupts if it detects a device on a port. The fix is, during hub
    > attach, to not assume that interrupts are off when we access the hub in
    > 'polling' mode.
    >
    > Not sure if this is a fix or a workaround. I'll leave that to the usb
    > gods to decide ...
    >
    > At any rate, I'd appreciate some feedback ... nForce2 users, does this
    > work for you ?

    It worked for me. I had to do a full buildworld, just doing buildkernel
    wasn't enough. Thanks for the patch.

    At this point I'm not sure if I want to try the patch from Ian Dowse
    since its working now and my USB hub is showing up as an OHCI.

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