From: Johan Hovold <johan@kernel.org>
Date: Thu, 12 Jan 2017 13:56:23 +0000 (+0100)
Subject: USB: serial: ti_usb_3410_5052: fix control-message error handling
X-Git-Tag: v3.2.89~86
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=132021a64919146cee0ed35b796e11f78136309e;p=pandora-kernel.git

USB: serial: ti_usb_3410_5052: fix control-message error handling

commit 39712e8bfa8d3aa6ce1e60fc9d62c9b076c17a30 upstream.

Make sure to detect and return an error on zero-length control-message
transfers when reading from the device.

This addresses a potential failure to detect an empty transmit buffer
during close.

Also remove a redundant check for short transfer when sending a command.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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