[PATCH][Precise][SRU] UBUNTU: SAUCE: samsung-laptop: disable in UEFI mode

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

BugLink: https://launchpad.net/bugs/1040557

Disable this driver if we've booted in UEFI mode as some Samsungs
seem to get bricked and are rendered unbootable when this driver
tries to poke around the BIOS controls when in UEFI.

Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 drivers/platform/x86/samsung-laptop.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index 1782cea..2b6560c 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 #include <linux/rfkill.h>
 #include <linux/acpi.h>
+#include <linux/efi.h>
 
 /*
  * This driver is needed because a number of Samsung laptops do not hook
@@ -824,6 +825,9 @@ static int __init samsung_init(void)
 	int loca;
 	int retval;
 
+	if (efi_enabled)
+		return -ENODEV;
+
 	mutex_init(&sabi_mutex);
 	handle_backlight = true;
 
-- 
1.7.5.4