lkml.org 
[lkml]   [2018]   [Feb]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH v2 0/4] of: change overlay apply input data from unflattened
Date
From: Frank Rowand <frank.rowand@sony.com>

Move duplicating and unflattening of an overlay flattened devicetree
(FDT) into the overlay application code. To accomplish this,
of_overlay_apply() is replaced by of_overlay_fdt_apply().

The copy of the FDT (aka "duplicate FDT") now belongs to devicetree
code, which is thus responsible for freeing the duplicate FDT. The
caller of of_overlay_fdt_apply() remains responsible for freeing the
original FDT.

The unflattened devicetree now belongs to devicetree code, which is
thus responsible for freeing the unflattened devicetree.

These ownership changes prevent early freeing of the duplicated FDT
or the unflattened devicetree, which could result in use after free
errors.

These changes led to migrating some unittest overlay data into
their own devicetree source files, and then converting most of
them to use sugar syntax instead of hand coding fragments.

Changes from v1:
- rebase on v4.16-rc1
- update documentation
- split out error message to a separate patch

Frank Rowand (4):
of: change overlay apply input data from unflattened to FDT
of: Documentation: of_overlay_apply() replaced by
of_overlay_fdt_apply()
of: convert unittest overlay devicetree source to sugar syntax
of: improve reporting invalid overlay target path

Documentation/devicetree/overlay-notes.txt | 4 +-
drivers/of/of_private.h | 1 +
drivers/of/overlay.c | 124 +++++++++-
drivers/of/resolver.c | 6 -
drivers/of/unittest-data/Makefile | 28 ++-
drivers/of/unittest-data/overlay.dts | 101 ++++----
drivers/of/unittest-data/overlay_0.dts | 14 ++
drivers/of/unittest-data/overlay_1.dts | 14 ++
drivers/of/unittest-data/overlay_10.dts | 27 +++
drivers/of/unittest-data/overlay_11.dts | 28 +++
drivers/of/unittest-data/overlay_12.dts | 14 ++
drivers/of/unittest-data/overlay_13.dts | 14 ++
drivers/of/unittest-data/overlay_15.dts | 30 +++
drivers/of/unittest-data/overlay_2.dts | 9 +
drivers/of/unittest-data/overlay_3.dts | 9 +
drivers/of/unittest-data/overlay_4.dts | 18 ++
drivers/of/unittest-data/overlay_5.dts | 9 +
drivers/of/unittest-data/overlay_6.dts | 10 +
drivers/of/unittest-data/overlay_7.dts | 10 +
drivers/of/unittest-data/overlay_8.dts | 10 +
drivers/of/unittest-data/overlay_9.dts | 10 +
drivers/of/unittest-data/overlay_bad_phandle.dts | 23 +-
drivers/of/unittest-data/overlay_bad_symbol.dts | 25 +-
drivers/of/unittest-data/tests-overlay.dtsi | 217 +----------------
drivers/of/unittest.c | 294 +++++++++++------------
include/linux/of.h | 7 -
26 files changed, 571 insertions(+), 485 deletions(-)
create mode 100644 drivers/of/unittest-data/overlay_0.dts
create mode 100644 drivers/of/unittest-data/overlay_1.dts
create mode 100644 drivers/of/unittest-data/overlay_10.dts
create mode 100644 drivers/of/unittest-data/overlay_11.dts
create mode 100644 drivers/of/unittest-data/overlay_12.dts
create mode 100644 drivers/of/unittest-data/overlay_13.dts
create mode 100644 drivers/of/unittest-data/overlay_15.dts
create mode 100644 drivers/of/unittest-data/overlay_2.dts
create mode 100644 drivers/of/unittest-data/overlay_3.dts
create mode 100644 drivers/of/unittest-data/overlay_4.dts
create mode 100644 drivers/of/unittest-data/overlay_5.dts
create mode 100644 drivers/of/unittest-data/overlay_6.dts
create mode 100644 drivers/of/unittest-data/overlay_7.dts
create mode 100644 drivers/of/unittest-data/overlay_8.dts
create mode 100644 drivers/of/unittest-data/overlay_9.dts

--
Frank Rowand <frank.rowand@sony.com>

\
 
 \ /
  Last update: 2018-02-12 09:52    [W:0.056 / U:0.064 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site