From: Changbin Du changbin.du@gmail.com
[ Upstream commit 668a84c1bfb2b3fd5a10847825a854d63fac7baa ]
setup_arch() would invoke efi_init()->efi_get_fdt_params(). If no valid fdt found then initial_boot_params will be null. So we should stop further fdt processing here. I encountered this issue on risc-v.
Signed-off-by: Changbin Du changbin.du@gmail.com Fixes: b91540d52a08b ("RISC-V: Add EFI runtime services") Signed-off-by: Ard Biesheuvel ardb@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/firmware/efi/fdtparams.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/firmware/efi/fdtparams.c b/drivers/firmware/efi/fdtparams.c index bb042ab7c2be..e901f8564ca0 100644 --- a/drivers/firmware/efi/fdtparams.c +++ b/drivers/firmware/efi/fdtparams.c @@ -98,6 +98,9 @@ u64 __init efi_get_fdt_params(struct efi_memory_map_data *mm) BUILD_BUG_ON(ARRAY_SIZE(target) != ARRAY_SIZE(name)); BUILD_BUG_ON(ARRAY_SIZE(target) != ARRAY_SIZE(dt_params[0].params));
+ if (!fdt) + return 0; + for (i = 0; i < ARRAY_SIZE(dt_params); i++) { node = fdt_path_offset(fdt, dt_params[i].path); if (node < 0)