diff options
| author | Rob Bradford <robert.bradford@intel.com> | 2019-05-25 13:25:59 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-05-25 13:48:17 +0200 |
| commit | 88447c5b93d98be847f428c39ba589779a59eb83 (patch) | |
| tree | cee45ba436e2cd3dda721a76d23a2e8c8ef4ecf7 /drivers/firmware | |
| parent | efi/x86/Add missing error handling to old_memmap 1:1 mapping code (diff) | |
| download | linux-88447c5b93d98be847f428c39ba589779a59eb83.tar.xz linux-88447c5b93d98be847f428c39ba589779a59eb83.zip | |
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 <robert.bradford@intel.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Gen Zhang <blackgod016574@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20190525112559.7917-3-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/efi.c | 3 |
1 files changed, 3 insertions, 0 deletions
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 |