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

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Message-ID: <1475049117-12201-1-git-send-email-Mark_Craske@mentor.com>
Date:   Wed, 28 Sep 2016 08:51:55 +0100
From:   Mark Craske <Mark_Craske@...tor.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
CC:     <linux-kernel@...r.kernel.org>,
        "George G. Davis" <George_Davis@...tor.com>,
        Jiada Wang <Jiada_Wang@...tor.com>
Subject: [PATCH v2 0/2] Two small dma-coherent bug fixes

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.
-- 
1.7.9.5