linux-kernel - Re: [PATCH] fix ehci alignment error

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Date:	Mon, 10 Oct 2011 19:31:26 +0200
From:	Mikael Pettersson <mikpe@...uu.se>
To:	Greg KH <gregkh@...e.de>
Cc:	Måns Rullgård <mans@...sr.com>,
	Nicolas Pitre <nico@...xnic.net>, linux-usb@...r.kernel.org,
	Harro Haan <hrhaan@...il.com>, linux-kernel@...r.kernel.org,
	Alan Stern <stern@...land.harvard.edu>,
	Lennert Buytenhek <kernel@...tstofly.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] fix ehci alignment error

Greg KH writes:
 > On Mon, Oct 10, 2011 at 05:29:13PM +0100, Måns Rullgård wrote:
 > > Greg KH <gregkh@...e.de> writes:
 > > 
 > > > On Mon, Oct 10, 2011 at 02:38:27PM +0200, Harro Haan wrote:
 > > >> The Kirkwood gave an unaligned memory access error on
 > > >> line 742 of drivers/usb/host/echi-hcd.c:
 > > >> "ehci->last_periodic_enable = ktime_get_real();"
 > > >
 > > > What is "The Kirkwood"?  What size processor is this?
 > > 
 > > It's an ARM926-like CPU from Marvell.
 > 
 > 32 or 64bit?

All ARMs are 32-bit, but some have instructions for loading or
storing 2 x 32 bits at a time, but also require the corresponding
memory address to be 64-bit aligned.
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