Commit d320c079 authored Jul 11, 2013 by Matt Fleming

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 <dyoung@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>

parent 6d128e1e

drivers/firmware/efi/efivars.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;