libfdt: overlay_merge: Fix incorrect reference to nodes

local_fixups node could have incorrect references to nodes
when merging two overlay blobs. Consider this example:

ol1.dtbo:
	/fragment@0 {
		__overlay__ {
			soc: soc {

			}

			tlmm: tlmm {
			}
		}

	}

ol2.dtbo:
	/fragment@0 {
		target = "&soc";

		__overlay__ {
			abc: abc {
				prop1 = <&tlmm>;
			}
		}
	}

	/fragment@1 {
		target = "&soc";

		__overlay__ {
			def: def {
				prop0 = <&abc>;
			}
		}
	}

	__fixups__ {
		tlmm = "/fragment@0/__overlay__/abc:prop1:0";

	}

	__local_fixups__ {
		fragment@1 {
			__overlay__ {
				def {
					prop0 = <0x0>;
				}
			}
		}
	}

Merging ol2.dtbo with ol1.dtbo currently results in:

	__local_fixups__ {
		fragment@1 {
			__overlay__ {
				abc {
					prop1 = <0x0>; // WRONG1
				}

			}
		}

		fragment@2 {
			__overlay__ {
				def {
					prop0 = <0x0>; // WRONG2
				}
			}
		}
	}

WRONG1: prop1 should be listed under
/__local_fixups__/fragment@0/__overlay__/soc/abc

WRONG2: prop0 should be listed under
/__local_fixups__/fragment@0/__overlay__/soc/def

Change-Id: If7aae9b285d0e6f78bb8ad4e9fbade2fc1e503be
Signed-off-by: Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>
Signed-off-by: Wasim Nazir <quic_wasimn@quicinc.com>

0 files changed, 0 insertions, 0 deletions