linux/drivers/platform, branch v3.8

samsung-laptop: Disable on EFI hardware

2013-01-30T19:52:11Z

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 Cc: Matthew Garrett Cc: Colin Ian King Cc: Steve Langasek Cc: Signed-off-by: Matt Fleming Signed-off-by: H. Peter Anvin

efi: Make 'efi_enabled' a function to query EFI facilities

2013-01-30T19:51:59Z

Originally 'efi_enabled' indicated whether a kernel was booted from EFI firmware. Over time its semantics have changed, and it now indicates whether or not we are booted on an EFI machine with bit-native firmware, e.g. 64-bit kernel with 64-bit firmware. The immediate motivation for this patch is the bug report at, https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557 which details how running a platform driver on an EFI machine that is designed to run under BIOS can cause the machine to become bricked. Also, the following report, https://bugzilla.kernel.org/show_bug.cgi?id=47121 details how running said driver can also cause Machine Check Exceptions. Drivers need a new means of detecting whether they're running on an EFI machine, as sadly the expression, if (!efi_enabled) hasn't been a sufficient condition for quite some time. Users actually want to query 'efi_enabled' for different reasons - what they really want access to is the list of available EFI facilities. For instance, the x86 reboot code needs to know whether it can invoke the ResetSystem() function provided by the EFI runtime services, while the ACPI OSL code wants to know whether the EFI config tables were mapped successfully. There are also checks in some of the platform driver code to simply see if they're running on an EFI machine (which would make it a bad idea to do BIOS-y things). This patch is a prereq for the samsung-laptop fix patch. Cc: David Airlie Cc: Corentin Chary Cc: Matthew Garrett Cc: Dave Jiang Cc: Olof Johansson Cc: Peter Jones Cc: Colin Ian King Cc: Steve Langasek Cc: Tony Luck Cc: Konrad Rzeszutek Wilk Cc: Rafael J. Wysocki Cc: Signed-off-by: Matt Fleming Signed-off-by: H. Peter Anvin

asus-laptop: Fix potential invalid pointer dereference

2013-01-07T17:33:48Z

The 0-day build testing backend noticed that a string could be dereferenced without validation. Fix that. Signed-off-by: Matthew Garrett

asus-laptop: Do not call HWRS on init

2013-01-07T17:32:48Z

Since commit 8871e99f89b7 ('asus-laptop: HRWS/HWRS typo'), module initialisation is very slow on the Asus UL30A. The HWRS method takes about 12 seconds to run, and subsequent initialisation also seems to be delayed. Since we don't really need the result, don't bother calling it on init. Those who are curious can still get the result through the 'infos' device attribute. Update the comment about HWRS in show_infos(). Reported-by: ryan References: http://bugs.debian.org/692436 Signed-off-by: Ben Hutchings Signed-off-by: Corentin Chary Signed-off-by: Matthew Garrett

sony-laptop: fix SNC buffer calls when SN06 returns Integers

2013-01-07T17:32:38Z

SN06 in some cases returns an Integer instead of a buffer. While the code handling the return value was trying to cope with the difference, the memcpy call was not making any difference between the two types of acpi_object union. This regression was introduced in 3.5. While there also rework the return value logic to improve readability. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=48671 Cc: Cc: Fabrizio Narni Cc: Signed-off-by: Mattia Dongili Signed-off-by: Matthew Garrett

samsung-laptop: Add quirk for broken acpi_video backlight on N250P

2013-01-07T17:32:12Z

BugLink: http://bugs.launchpad.net/bugs/1086921 Cc: stable@vger.kernel.org # v3.4+ Signed-off-by: Seth Forshee Signed-off-by: Matthew Garrett

acer-wmi: add Aspire 5741G touchpad toggle key

2013-01-07T17:32:04Z

Add Aspire 5741G KEY_TOUCHPAD_TOGGLE to wmi keymap, preventing "acer_wmi: Unknown key number - 0x85" error. Signed-off-by: Sergey Senozhatsky Signed-off-by: Matthew Garrett

acer-wmi: change to emit touchpad on off key

2013-01-07T17:31:42Z

KEY_TOUCHPAD_TOOGLE key is for notice userland change touchpad state via xf86-input-synaptics on the machine that don't toggle touchpad in hardware. But, acer laptop actually toggle touchpad in hardware. So, this patch change to emit KEY_TOUCHPAD_ON/OFF key when acer-wmi grab device state of touchpad. Reference: brc#848270 https://bugzilla.redhat.com/show_bug.cgi?id=848270 Tested-by: Nathanael Noblet Cc: Carlos Corbacho Cc: Matthew Garrett Cc: Dmitry Torokhov Cc: Corentin Chary Cc: Thomas Renninger Signed-off-by: Lee, Chun-Yi Signed-off-by: Matthew Garrett

acer-wmi: fix obj is NULL but dereferenced

2013-01-07T17:31:30Z

Fengguang Wu run coccinelle and warns about: drivers/platform/x86/acer-wmi.c:1200:17-21: ERROR: obj is NULL but dereferenced. drivers/platform/x86/acer-wmi.c:891:17-21: ERROR: obj is NULL but dereferenced. drivers/platform/x86/acer-wmi.c:1953:17-21: ERROR: obj is NULL but dereferenced. It causes by the code in patch 987dfbaa65b2c3568b85e29d2598da08a011ee09 doesn't check obj variable should not be NULL. There have risk for dereference a NULL obj, so add this patch to fix. Cc: Carlos Corbacho Cc: Matthew Garrett Cc: Dmitry Torokhov Cc: Corentin Chary Cc: Thomas Renninger Signed-off-by: Lee, Chun-Yi Signed-off-by: Matthew Garrett

Drivers: platform: x86: remove __dev* attributes.

2013-01-03T23:57:03Z

CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton Cc: Joey Lee Cc: Matthew Garrett Cc: Peter Feuerer Cc: Corentin Chary Cc: Cezary Jackiewicz Cc: Robert Gerlach Cc: Ike Panhc Cc: Henrique de Moraes Holschuh Signed-off-by: Greg Kroah-Hartman