This is a note to let you know that I've just added the patch titled
samsung-laptop: Disable on EFI hardware
to the 3.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
samsung-laptop-disable-on-efi-hardware.patch
and it can be found in the queue-3.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From e0094244e41c4d0c7ad69920681972fc45d8ce34 Mon Sep 17 00:00:00 2001
From: Matt Fleming <[email protected]>
Date: Thu, 3 Jan 2013 09:02:37 +0000
Subject: samsung-laptop: Disable on EFI hardware
From: Matt Fleming <[email protected]>
commit e0094244e41c4d0c7ad69920681972fc45d8ce34 upstream.
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.
Signed-off-by: Matt Fleming <[email protected]>
Cc: Corentin Chary <[email protected]>
Cc: Matthew Garrett <[email protected]>
Cc: Colin Ian King <[email protected]>
Cc: Steve Langasek <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/platform/x86/samsung-laptop.c | 4 ++++
1 file changed, 4 insertions(+)
--- 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;
Patches currently in stable-queue which might be from [email protected] are
queue-3.7/efi-make-efi_enabled-a-function-to-query-efi-facilities.patch
queue-3.7/samsung-laptop-disable-on-efi-hardware.patch
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