path: root/drivers/platform/x86/samsung-laptop.c
diff options
authorMatt Fleming <matt.fleming@intel.com>2013-01-03 09:02:37 (GMT)
committerH. Peter Anvin <hpa@linux.intel.com>2013-01-30 19:52:11 (GMT)
commite0094244e41c4d0c7ad69920681972fc45d8ce34 (patch)
tree1908d5420877a04429d68d1e091b6b1eefb11185 /drivers/platform/x86/samsung-laptop.c
parent83e68189745ad931c2afd45d8ee3303929233e7f (diff)
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>
Diffstat (limited to 'drivers/platform/x86/samsung-laptop.c')
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/platform/x86/samsung-laptop.c b/drivers/platform/x86/samsung-laptop.c
index 71623a2..d1f03005 100644
--- a/drivers/platform/x86/samsung-laptop.c
+++ b/drivers/platform/x86/samsung-laptop.c
@@ -26,6 +26,7 @@
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <linux/ctype.h>
+#include <linux/efi.h>
#include <acpi/video.h>
@@ -1544,6 +1545,9 @@ static int __init samsung_init(void)
struct samsung_laptop *samsung;
int ret;
+ if (efi_enabled(EFI_BOOT))
+ return -ENODEV;
quirks = &samsung_unknown;
if (!force && !dmi_check_system(samsung_dmi_table))
return -ENODEV;

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