From 7f8d73f9e71d58187f42d26088578be5d2d70859 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Thu, 3 Jan 2013 09:02:37 +0000 Subject: [PATCH] samsung-laptop: Disable on EFI hardware 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 Cc: Corentin Chary Cc: Matthew Garrett Cc: Colin Ian King Cc: Steve Langasek Signed-off-by: H. Peter Anvin Signed-off-by: Greg Kroah-Hartman --- 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 1afbe5e..de9f432 100644 --- a/drivers/platform/x86/samsung-laptop.c +++ b/drivers/platform/x86/samsung-laptop.c @@ -26,6 +26,7 @@ #include #include #include +#include #if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE) #include #endif @@ -1527,6 +1528,9 @@ 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; -- 2.7.4