From 7b4eeed174b71c325705ff8c53f333bc79d0ee7a Mon Sep 17 00:00:00 2001
From: James Harper <james.harper@ejbdigital.com.au>
Date: Thu, 12 Jun 2014 06:53:38 -0300
Subject: [PATCH] [media] vmalloc_sg: make sure all pages in vmalloc area are
 really DMA-ready

Patch originally written by Konrad. Rebased on current linux media tree.

Under Xen, vmalloc_32() isn't guaranteed to return pages which are really
under 4G in machine physical addresses (only in virtual pseudo-physical
addresses).  To work around this, implement a vmalloc variant which
allocates each page with dma_alloc_coherent() to guarantee that each
page is suitable for the device in question.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: James Harper <james.harper@ejbdigital.com.au>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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Reading git-format-patch failed