From d320c079efd46db1be0640d00bd6723d9e738f9f Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Thu, 11 Jul 2013 07:30:33 +0100 Subject: efivars: check for EFI_RUNTIME_SERVICES The efivars code requires EFI runtime services to function, so check that they are enabled. This fixes a crash when booting with the "noefi" kernel parameter, and also when mixing kernel and firmware "bitness", e.g. 32-bit kernel with 64-bit firmware. Tested-by: Dave Young Signed-off-by: Matt Fleming --- drivers/firmware/efi/efivars.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/firmware') diff --git a/drivers/firmware/efi/efivars.c b/drivers/firmware/efi/efivars.c index 8bd1bb6dbe47..8a7432a4b413 100644 --- a/drivers/firmware/efi/efivars.c +++ b/drivers/firmware/efi/efivars.c @@ -583,6 +583,9 @@ int efivars_sysfs_init(void) struct kobject *parent_kobj = efivars_kobject(); int error = 0; + if (!efi_enabled(EFI_RUNTIME_SERVICES)) + return -ENODEV; + /* No efivars has been registered yet */ if (!parent_kobj) return 0; -- cgit v1.2.3