From mboxrd@z Thu Jan  1 00:00:00 1970
From: erik quanstrom <quanstro@quanstro.net>
Date: Fri,  2 May 2014 14:34:35 -0400
To: 9fans@9fans.net
Message-ID: <fbf8c2424bdbb826b2260096faf74b89@ladd.quanstro.net>
In-Reply-To: <cc8299f61d4bb42cdff9112af57eeacb@brasstown.quanstro.net>
References: <cc8299f61d4bb42cdff9112af57eeacb@brasstown.quanstro.net>
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Subject: Re: [9fans] ehci/uhci interrupts
Topicbox-Message-UUID: dc8aff1c-ead8-11e9-9d60-3106f5b1d025

On Fri May  2 11:28:41 EDT 2014, quanstro@quanstro.net wrote:
> it appears that uhci is causing spurious ehci interrupts, or at least
> ehci/uhci are causing each other to ring.  i haven't tracked down
> the fundamental issue yet.  but this appears to be related to the
> ehci/uhci subordinate issue, and the Callmine setting.

problem found.  patch appled.  if a ehci controller is 64-bit capable,
one must turn off 64-bit capabilities on all controllers before initializing
any of them.

- erik