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List: linux-api
Subject: [PATCH v5 0/2] staging: ion: get one device per heap
From: Benjamin Gaignard <benjamin.gaignard () linaro ! org>
Date: 2017-09-27 13:20:07
Message-ID: 1506518409-16887-1-git-send-email-benjamin.gaignard () linaro ! org
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version 5:
- create a configuration flag to keep legacy Ion misc device
version 4:
- add a configuration flag to switch between legacy Ion misc device
and one device per heap version.
This change has been suggested after Laura talks at XDC 2017.
version 3:
- change ion_device_add_heap prototype to return a possible error.
version 2:
- simplify ioctl check like propose by Dan
- make sure that we don't register more than ION_DEV_MAX heaps.
Until now all ion heaps are addressing using the same device "/dev/ion".
This way of working doesn't allow to give access rights (for example with
SElinux rules) per heap.
This series propose to have one device "/dev/ionX" per heap.
Query heaps informations will be possible on each device node but
allocation request will only be possible if heap_mask_id match with device minor number.
Using legacy Ion misc device is still by setting ION_LEGACY_DEVICE_API
configuration flag.
Benjamin Gaignard (2):
staging: ion: simplify ioctl args checking function
staging: ion: create one device entry per heap
drivers/staging/android/TODO | 1 -
drivers/staging/android/ion/Kconfig | 7 +++++++
drivers/staging/android/ion/ion-ioctl.c | 29 +++++++++++++++++++++--------
drivers/staging/android/ion/ion.c | 31 ++++++++++++++++++++++++++++++-
drivers/staging/android/ion/ion.h | 15 +++++++++++++--
5 files changed, 71 insertions(+), 12 deletions(-)
--
2.7.4
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