From e6ebd01ffd7b79678dfdda1d3b5653e8aea3eb41 Mon Sep 17 00:00:00 2001
From: Jay Fenlason <fenlason@redhat.com>
Date: Fri, 11 Dec 2009 14:23:58 -0500
Subject: [PATCH] firewire: ohci: handle receive packets with a data length of
 zero

commit 8c0c0cc2d9f4c523fde04bdfe41e4380dec8ee54 upstream.

Queueing to receive an ISO packet with a payload length of zero
silently does nothing in dualbuffer mode, and crashes the kernel in
packet-per-buffer mode.  Return an error in dualbuffer mode, because
the DMA controller won't let us do what we want, and work correctly in
packet-per-buffer mode.

Signed-off-by: Jay Fenlason <fenlason@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
Reading git-format-patch failed