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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 25 Aug 2014 14:48:56 +0200
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Subject: Re: [Qemu-devel] [PATCH 1/2] usb: Fix bootindex for portnr > 9
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To: Markus Armbruster <armbru@redhat.com>
Cc: kwolf@redhat.com, lersek@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com

On Fr, 2014-08-15 at 13:32 +0200, Markus Armbruster wrote:
> We identify devices by their Open Firmware device paths.  The encoding
> of the host controller and hub port numbers is incorrect:
> usb_get_fw_dev_path() formats them in decimal, while SeaBIOS uses
> hexadecimal.  When some port number > 9, SeaBIOS will miss the
> bootindex (lucky case), or apply it to another device (unlucky case).
> 
> The relevant spec[*] agrees with SeaBIOS (and OVMF, for that matter).
> Change %d to %x.
> 
> Bug can bite only with host controllers or hubs sporting more than ten
> ports.  I'm not aware of any.

fyi: xhci can be configured with up to 15 ports (default is 4 ports
though).

Applied to usb patch queue.

thanks,
  Gerd