linux-stable/drivers/of
Herve Codina 3ee2424107 of: dynamic: Synchronize of_changeset_destroy() with the devlink removals
commit 8917e73853 upstream.

In the following sequence:
  1) of_platform_depopulate()
  2) of_overlay_remove()

During the step 1, devices are destroyed and devlinks are removed.
During the step 2, OF nodes are destroyed but
__of_changeset_entry_destroy() can raise warnings related to missing
of_node_put():
  ERROR: memory leak, expected refcount 1 instead of 2 ...

Indeed, during the devlink removals performed at step 1, the removal
itself releasing the device (and the attached of_node) is done by a job
queued in a workqueue and so, it is done asynchronously with respect to
function calls.
When the warning is present, of_node_put() will be called but wrongly
too late from the workqueue job.

In order to be sure that any ongoing devlink removals are done before
the of_node destruction, synchronize the of_changeset_destroy() with the
devlink removals.

Fixes: 80dd33cf72 ("drivers: base: Fix device link removal")
Cc: stable@vger.kernel.org
Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Reviewed-by: Saravana Kannan <saravanak@google.com>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240325152140.198219-3-herve.codina@bootlin.com
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2024-04-10 16:19:42 +02:00
..
unittest-data of: Fix double free in of_parse_phandle_with_args_map 2024-01-25 14:52:46 -08:00
Kconfig
Makefile
address.c of/address: Return an error when no valid dma-ranges are found 2023-02-14 19:17:57 +01:00
base.c of: Fix double free in of_parse_phandle_with_args_map 2024-01-25 14:52:46 -08:00
device.c of: Fix modalias string generation 2023-05-11 23:00:32 +09:00
dynamic.c of: dynamic: Synchronize of_changeset_destroy() with the devlink removals 2024-04-10 16:19:42 +02:00
fdt.c of: fdt: fix off-by-one error in unflatten_dt_nodes() 2022-09-23 14:15:46 +02:00
fdt_address.c
irq.c
kexec.c of: kexec: Mark ima_{free,stable}_kexec_buffer() as __init 2023-09-19 12:22:30 +02:00
kobj.c
of_numa.c
of_private.h
of_reserved_mem.c of: reserved_mem: Have kmemleak ignore dynamically allocated reserved mem 2023-02-22 12:57:07 +01:00
overlay.c of: overlay: Reorder struct fragment fields kerneldoc 2023-10-19 23:05:32 +02:00
pdt.c
platform.c
property.c of: property: fix typo in io-channels 2024-02-23 08:55:10 +01:00
resolver.c
unittest.c of: unittest: Fix compile in the non-dynamic case 2024-02-23 08:55:01 +01:00