linux

iv/linux

History

Guenter Roeck f806238667 of/fdt: Add mutex protection for calls to __unflatten_device_tree()

__unflatten_device_tree() calls unflatten_dt_node(), which declares
a static variable. It is therefore not reentrant.

One of the callers of __unflatten_device_tree(), unflatten_device_tree(),
is only called once during early initialization and does not need to be
protected. The other caller, of_fdt_unflatten_tree(), can be called at
any time, possibly multiple times in parallel. This can happen, for
example, if multiple devicetree overlays have to be loaded and installed.

Without this protection, errors such as the following may be seen.

kernel: End of tree marker overwritten: e6a3a458
kernel: find_target_node:
	Failed to find target-indirect node at /fragment@0
kernel: __of_overlay_create: of_build_overlay_info() failed for tree@/

Add a mutex to of_fdt_unflatten_tree() to make the call reentrant.

Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable@vger.kernel.org # v4.1+
Signed-off-by: Rob Herring <robh@kernel.org>

2015-12-08 09:50:42 -06:00

unittest-data

of/unittest: replace 'selftest' with 'unittest'

2015-03-25 00:53:29 -05:00

address.c

of/address: fix typo in comment block of of_translate_one()

2015-11-30 17:57:01 -06:00

base.c

of: simplify arch_find_n_match_cpu_physical_id() function

2015-10-30 13:04:19 -05:00

device.c

of: to support binding numa node to specified device in devicetree