of: overlay: Stop leaking resources on overlay removal
Only the overlay notifier callbacks have a chance to potentially get
hold of references to those two resources, but they are not supposed to
store them beyond OF_OVERLAY_POST_REMOVE.
Document the overlay notifier API, its constraint regarding pointer
lifetime, and then remove intentional leaks of ovcs->overlay_tree and
ovcs->fdt from free_overlay_changeset.
See also https://lkml.org/lkml/2018/4/23/1063 and following.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
(cherry picked from commit 83ef4777f5ff3689e6e52d3913a13d79aa25f1b5)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2 files changed
