samsung-laptop: Disable on EFI hardware
authorMatt Fleming <matt.fleming@intel.com>
Thu, 3 Jan 2013 09:02:37 +0000 (09:02 +0000)
committerH. Peter Anvin <hpa@linux.intel.com>
Wed, 30 Jan 2013 19:52:11 +0000 (11:52 -0800)
commite0094244e41c4d0c7ad69920681972fc45d8ce34
tree1908d5420877a04429d68d1e091b6b1eefb11185
parent83e68189745ad931c2afd45d8ee3303929233e7f
samsung-laptop: Disable on EFI hardware

It has been reported that running this driver on some Samsung laptops
with EFI can cause those machines to become bricked as detailed in the
following report,

https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557

There have also been reports of this driver causing Machine Check
Exceptions on recent EFI-enabled Samsung laptops,

https://bugzilla.kernel.org/show_bug.cgi?id=47121

So disable it if booting from EFI since this driver relies on
grovelling around in the BIOS memory map which isn't going to work.

Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Steve Langasek <steve.langasek@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
drivers/platform/x86/samsung-laptop.c