[PATCH v2 0/2] Two small dma-coherent bug fixes

From: Mark Craske
Date: Wed Sep 28 2016 - 03:52:28 EST

This patchset contains the following commits:

Bastian Hecht (1):
drivers: dma-coherent: Move spinlock in dma_alloc_from_coherent()

George G. Davis (1):
drivers: dma-coherent: Fix DMA coherent size for less than page

drivers/base/dma-coherent.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

Background information
These 2 commits were originally developed and validated on an ARM i.MX6 based
commercial project running a highly modified 3.14 Linux kernel.
The commits were needed to amend dma_mmap_from_coherent() to deal correctly
with mappings of less than one page, and to improve latency on SMP systems
where large DMA buffers are used.

The commits have been forward-ported to driver-core repo driver-core-next
branch HEAD (6ee6d1c carl9170: fix debugfs crashes)

Commit details
This patchset fixes a couple of problems with dma-coherent seen
on a commercial i.MX6 based system.

Note: Testing has only been done on an ARM i.MX6 based platform.