From: Mauro Carvalho Chehab <m.chehab@samsung.com>
Date: Wed, 3 Sep 2014 23:44:04 +0000 (-0300)
Subject: [media] ngene: properly handle __user ptr
X-Git-Tag: fixes-against-v3.18-rc2~130^2^2~229
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04da2daee383391954b34e7d0fe0281d75447d61;p=pandora-kernel.git

[media] ngene: properly handle __user ptr

Sparse is complaining about ngene's bad usage of a __user ptr:

>> drivers/media/pci/ngene/ngene-dvb.c:62:48: sparse: incorrect type in argument 2 (different address spaces)
   drivers/media/pci/ngene/ngene-dvb.c:62:48:    expected unsigned char const [usertype] *buf
   drivers/media/pci/ngene/ngene-dvb.c:62:48:    got char const [noderef] <asn:1>*buf

As this is intercepting a .write() file ops, we can't just memcpy. We need to use
copy_from_user.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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