tree 384226573b38d21be07a3efe5a89b4348158170d
parent e04c9b50d4f50ed661f06db883e77c8b56acf386
author Tiago Vignatti <tiago.vignatti@intel.com> 1453811547 -0200
committer chrome-bot <chrome-bot@chromium.org> 1458811182 -0700

Relax the restriction and permit read/write access on dma-buf

This patch relax the restriction and permit read/write access on dma-buf. In
particular this is necessary for the userspace mmap()ing a dma-buf fd, so
Chrome could now use it for unpriviledged Renderers write into a graphics
buffer without much difficulty. This has been discussed in upstream here:

http://lists.freedesktop.org/archives/dri-devel/2015-December/097562.html

Kernel changes are needed to use this userspace feature:

Author: Daniel Thompson <daniel.thompson@linaro.org>
Date:   Fri Jun 19 14:52:28 2015 +0100

    drm: prime: Honour O_RDWR during prime-handle-to-fd

BUG=chromium:581151
TEST=test_that -b strago $DEVICE graphics_SanAngeles
     test_that -b strago $DEVICE graphics_GLBench
     test_that -b strago $DEVICE graphics_Sanity

Change-Id: I37aff88623ba6aa45797b0ccb6cd2d15c5c51f41
Reviewed-on: https://chromium-review.googlesource.com/323990
Commit-Ready: Tiago Vignatti <tiago.vignatti@intel.com>
Tested-by: Tiago Vignatti <tiago.vignatti@intel.com>
Reviewed-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Tiago Vignatti <tiago.vignatti@intel.com>
Reviewed-by: Stéphane Marchesin <marcheu@chromium.org>