From: George Spelvin <linux@horizon.com>
Date: Sun, 11 May 2014 11:12:09 +0000 (-0300)
Subject: [media] ati_remote: Check the checksum
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~155^2~100
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=20d7e3ca1be76a13fb4ea22246bb9d0c4c365809;p=pandora-kernel.git

[media] ati_remote: Check the checksum

An input report is 4 bytes long, but there are only 12 bits
of actual payload.  The 4 bytes are:
data[0] = 0x14
data[1] = data[2] + data[3] + 0xd5 (a checksum byte)
data[2] = the raw scancode (plus toggle bit in msbit)
data[3] = channel << 4 (the low 4 bits must be zero)

Ignore reports with a bad checksum.

Signed-off-by: George Spelvin <linux@horizon.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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