From 88447c5b93d98be847f428c39ba589779a59eb83 Mon Sep 17 00:00:00 2001 From: Rob Bradford Date: Sat, 25 May 2019 13:25:59 +0200 Subject: efi: Allow the number of EFI configuration tables entries to be zero Only try and access the EFI configuration tables if there there are any reported. This allows EFI to be continued to used on systems where there are no configuration table entries. Signed-off-by: Rob Bradford Signed-off-by: Ard Biesheuvel Cc: Gen Zhang Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/20190525112559.7917-3-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar --- drivers/firmware/efi/efi.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/firmware') diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 55b77c576c42..521a541d02ad 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -636,6 +636,9 @@ int __init efi_config_init(efi_config_table_type_t *arch_tables) void *config_tables; int sz, ret; + if (efi.systab->nr_tables == 0) + return 0; + if (efi_enabled(EFI_64BIT)) sz = sizeof(efi_config_table_64_t); else -- cgit v1.2.3