of/fdt: Fix the len check in early_init_dt_check_for_elfcorehdr()

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[ Upstream commit bec5f6092b ]

The len value is in bytes, while `dt_root_addr_cells + dt_root_size_cells`
is in cells (4 bytes per cell). Comparing them directly is incorrect.

Use a helper function to simplify the code and address this issue.

Fixes: f7e7ce93aa ("of: fdt: Add generic support for handling elf core headers property")
Fixes: e62aaeac42 ("arm64: kdump: provide /proc/vmcore file")
Signed-off-by: Yuntao Wang <yuntao.wang@linux.dev>
Link: https://patch.msgid.link/20251115134753.179931-3-yuntao.wang@linux.dev
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Yuntao Wang 2025-11-15 21:47:47 +08:00 • committed by Greg Kroah-Hartman

parent 7045d5970e

commit f326efdcab

1 changed files with 2 additions and 8 deletions

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drivers/of/fdt.c

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