[Quantal] [PATCH 0/3] Prevent samsung-laptop bricking when using UEFI

[Brad Figg]

SRU Justification:

Impact:
With the existing code there is still the chance that the samsung-laptop driver can run if the given system is booting a 32-bit kernel with 64-bit EFI firmware (or vice versa). This
can lead to a system that is "bricked" and can not be recovered.

Fix:
First, we will need to revert the existing commit we have for the samsung-laptop/EFI
issue:
    2fe5d5c565ad7ed16d5a01eee1f03dfd91dfa6a0 (Quantal tree)

Then we need to cherry-pick/backport the following two commits from Linus' tree
    83e68189745ad931c2afd45d8ee3303929233e7f
    e0094244e41c4d0c7ad69920681972fc45d8ce34


The following patches do exactly that, they revert the previous Ubuntu Sauce
patch to the samsung-laptop driver, backport the "Make 'efi_enabled' a function"
commit and cherry-pick a new commit to the samsung-laptop driver.

Brad Figg (1):
  Revert "UBUNTU: SAUCE: samsung-laptop: disable in UEFI mode"

Matt Fleming (2):
  efi: Make 'efi_enabled' a function to query EFI facilities
  samsung-laptop: Disable on EFI hardware

 arch/x86/include/asm/efi.h             |    1 +
 arch/x86/kernel/reboot.c               |    2 +-
 arch/x86/kernel/setup.c                |   28 ++++++++--------
 arch/x86/platform/efi/efi.c            |   57 +++++++++++++++++++-------------
 drivers/acpi/osl.c                     |    2 +-
 drivers/firmware/dmi_scan.c            |    2 +-
 drivers/firmware/efivars.c             |    4 +--
 drivers/firmware/iscsi_ibft_find.c     |    2 +-
 drivers/gpu/drm/radeon/radeon_device.c |    3 +-
 drivers/platform/x86/ibm_rtl.c         |    2 +-
 drivers/platform/x86/samsung-laptop.c  |    4 +--
 drivers/scsi/isci/init.c               |    2 +-
 include/linux/efi.h                    |   24 ++++++++++----
 init/main.c                            |    4 +--
 14 files changed, 81 insertions(+), 56 deletions(-)

-- 
1.7.9.5