From: Johan Hovold <johan@kernel.org>
Date: Thu, 12 Jan 2017 13:56:13 +0000 (+0100)
Subject: USB: serial: io_edgeport: fix epic-descriptor handling
X-Git-Tag: v3.2.89~90
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dc73ec04b254210670f913e8150e38b59191db65;p=pandora-kernel.git

USB: serial: io_edgeport: fix epic-descriptor handling

commit e4457d9798adb96272468e93da663de9bd0a4198 upstream.

Use a dedicated buffer for the DMA transfer and make sure to detect
short transfers to avoid parsing a corrupt descriptor.

Fixes: 6e8cf7751f9f ("USB: add EPIC support to the io_edgeport driver")
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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