media: dvb: i2c transfers over usb cannot be done from stack

media: dvb: i2c transfers over usb cannot be done from stack

BugLink: http://bugs.launchpad.net/bugs/1731951
commit b4756707152700c96acdfe149cb1ca4cec306c7a upstream.

Since commit 29d2fef8be11 ("usb: catch attempts to submit urbs
with a vmalloc'd transfer buffer"), the AverMedia AverTV DVB-T
USB 2.0 (a800) fails to probe.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>