From: Geoff Levand <geoff@infradead.org>
Date: Wed, 9 Nov 2011 00:01:18 +0000 (-0800)
Subject: usb: PS3 EHCI QH read work-around
X-Git-Tag: v3.2.21~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5f081af6cbb83e72194ad3a82623ca42eeb0e662;p=pandora-kernel.git

usb: PS3 EHCI QH read work-around

commit aaa0ef289afe9186f81e2340114ea413eef0492a upstream.

PS3 EHCI HC errata fix 244.  The SCC EHCI HC will not correctly perform QH
reads that occur near or span a micro-frame boundry.  This is due to a problem
in the Nak Count Reload Control logic (EHCI Specification 1.0 Section 4.9.1).

The work-around for this problem is for the HC driver to set I=1 (inactive) for
QHs with H=1 (list head).

Signed-off-by: Geoff Levand <geoff@infradead.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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