[PATCH][Quantal][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 file changed, 4 insertions(+)

diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index e2a34b4..bec0faf 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -29,6 +29,7 @@
 #if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
 #include <acpi/video.h>
 #endif
+#include <linux/efi.h>
 
 /*
  * This driver is needed because a number of Samsung laptops do not hook
@@ -1517,6 +1518,9 @@ static int __init samsung_init(void)
 	struct samsung_laptop *samsung;
 	int ret;
 
+	if (efi_enabled)
+		return -ENODEV;
+
 	quirks = &samsung_unknown;
 	if (!force && !dmi_check_system(samsung_dmi_table))
 		return -ENODEV;
-- 
1.7.10.4