From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH v2 3/9] xen/arm: io: Support sign-extension
 for every read access
Date: Tue, 6 Oct 2015 14:47:00 +0100
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On Mon, 2015-10-05 at 13:51 +0100, Julien Grall wrote:
> [...]
> +    /*
> +     * Sign extend if required.
> +     * Note that we expect the read handler to have zeroed the bit
> +     * unused in the register.

You were (correctly) going to change this to 
    Note that we expect the read handler to have zeroed the bits outside the
    requested access size.

Apart from that (which I can fix on commit):
Acked-by: Ian Campbell <ian.campbell@citrix.com>