dtc/tests/overlay_overlay_no_fixups.dts
Uwe Kleine-König 61e88fdcec libfdt: overlay: Fix phandle overwrite check for new subtrees
If the overlay's target is only created in a previous fragment, it
doesn't exist in the unmodified base device tree. For the phandle
overwrite check this can be ignored because in this case the base tree
doesn't contain a phandle that could be overwritten.

Adapt the corresponding check to not error out if that happens but just
continue with the next fragment.

This is currently triggered by
arch/arm64/boot/dts/renesas/salvator-panel-aa104xd12.dtso in the kernel
repository which creates /panel in its first fragment and modifies it in
its second.

Reported-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/all/CAL_JsqL9MPycDjqQfPNAuGfC6EMrdzUivr+fuOS7YgU3biGd4A@mail.gmail.com/
Fixes: 1fad065080 ("libfdt: overlay: ensure that existing phandles are not overwritten")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Message-ID: <20240626075551.2493048-2-u.kleine-koenig@baylibre.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2024-07-05 21:53:18 +10:00

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/*
* Copyright (c) 2016 NextThing Co
* Copyright (c) 2016 Free Electrons
*
* SPDX-License-Identifier: GPL-2.0+
*/
/dts-v1/;
/ {
fragment@0 {
target-path = "/test-node";
__overlay__ {
test-int-property = <43>;
};
};
/* Test that we can replace a string by a longer one */
fragment@1 {
target-path = "/test-node";
__overlay__ {
test-str-property = "foobar";
};
};
/* Test that we add a new property */
fragment@2 {
target-path = "/test-node";
__overlay__ {
test-str-property-2 = "foobar2";
};
};
fragment@3 {
target-path = "/test-node";
__overlay__ {
new-node {
new-property;
};
};
};
fragment@4 {
target-path = "/";
__overlay__ {
local: new-local-node {
new-property;
};
};
};
fragment@5 {
target-path = "/";
__overlay__ {
test-several-phandle = <&local>, <&local>;
};
};
fragment@6 {
target-path = "/test-node";
__overlay__ {
sub-test-node {
new-sub-test-property;
};
};
};
fragment@7 {
target-path = "/new-local-node";
__overlay__ {
another-new-property;
};
};
__local_fixups__ {
fragment@5 {
__overlay__ {
test-several-phandle = <0 4>;
};
};
};
};