tree e81dfaa7f9347ed4b15d0dc1897acda838c0a8c9
parent e7604239c1c56430f1b40ebad161b23d44485c30
author George G. Davis <george_davis@mentor.com> 1475049116 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1475077996 +0200

drivers: dma-coherent: Fix DMA coherent size for less than page

We fix a bug in dma_mmap_from_coherent() that appears when we map non page
aligned DMA memory. It cuts off the non aligned part (this is different to
dma_alloc_coherent() that always rounds up to full pages). So for mappings
of less than a page we get -ENXIO as dma_mmap_from_coherent() assumes we
want to map zero pages.

Signed-off-by: George G. Davis <george_davis@mentor.com>
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
Signed-off-by: Mark Craske <Mark_Craske@mentor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>