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| author | Jiaxun Yang <jiaxun.yang@flygoat.com> | 2024-06-03 10:45:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-16 14:51:02 +0300 |
| commit | 63a48912792cdeadf53a4934eba66ccb1d3cb0fa (patch) | |
| tree | 6e8e39078652bde89c3be7d16397b781b3baac0d /arch | |
| parent | 750d0844591894b97aaa2b61b7ab1fb67d169798 (diff) | |
| download | linux-63a48912792cdeadf53a4934eba66ccb1d3cb0fa.tar.xz | |
LoongArch: Fix built-in DTB detection
commit b56f67a6c748bb009f313f91651c8020d2338d63 upstream.
fdt_check_header(__dtb_start) will always success because kernel
provides a dummy dtb, and by coincidence __dtb_start clashed with
entry of this dummy dtb. The consequence is fdt passed from firmware
will never be taken.
Fix by trying to utilise __dtb_start only when CONFIG_BUILTIN_DTB is
enabled.
Cc: stable@vger.kernel.org
Fixes: 7b937cc243e5 ("of: Create of_root if no dtb provided by firmware")
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/kernel/setup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/setup.c b/arch/loongarch/kernel/setup.c index 60e0fe97f61a..e8f7a54ff67c 100644 --- a/arch/loongarch/kernel/setup.c +++ b/arch/loongarch/kernel/setup.c @@ -282,7 +282,7 @@ static void __init fdt_setup(void) return; /* Prefer to use built-in dtb, checking its legality first. */ - if (!fdt_check_header(__dtb_start)) + if (IS_ENABLED(CONFIG_BUILTIN_DTB) && !fdt_check_header(__dtb_start)) fdt_pointer = __dtb_start; else fdt_pointer = efi_fdt_pointer(); /* Fallback to firmware dtb */ |