From: Jay Fenlason <fenlason@redhat.com>
Date: Fri, 11 Dec 2009 19:23:58 +0000 (-0500)
Subject: firewire: ohci: handle receive packets with a data length of zero
X-Git-Tag: v2.6.27.42~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e6ebd01ffd7b79678dfdda1d3b5653e8aea3eb41;p=pandora-kernel.git

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>
---

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