linux.git/drivers/acpi, branch v3.14-rc5

ACPI / processor: Rework processor throttling with work_on_cpu()

2014-02-26T23:21:05+00:00

acpi_processor_set_throttling() uses set_cpus_allowed_ptr() to make
sure that the (struct acpi_processor)->acpi_processor_set_throttling()
callback will run on the right CPU.  However, the function may be
called from a worker thread already bound to a different CPU in which
case that won't work.

Make acpi_processor_set_throttling() use work_on_cpu() as appropriate
instead of abusing set_cpus_allowed_ptr().

Reported-and-tested-by: Jiri Olsa 
Signed-off-by: Lan Tianyu 
Cc: All applicable 
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki

Merge branches 'acpi-pm' and 'acpi-video'

2014-02-21T00:28:12+00:00

* acpi-pm:
  ACPI / thermal: fix thermal driver compile error when CONFIG_PM_SLEEP is undefined
  ACPI / SBS: fix SBS driver compile error when CONFIG_PM_SLEEP is undefined
  ACPI / fan: fix fan driver compile error when CONFIG_PM_SLEEP is undefined
  ACPI / button: fix button driver compile error when CONFIG_PM_SLEEP is undefined
  ACPI / battery: fix battery driver compile error when CONFIG_PM_SLEEP is undefined
  ACPI / AC: fix AC driver compile error when CONFIG_PM_SLEEP is undefined

* acpi-video:
  Revert "ACPI: Blacklist Win8 OSI for some HP laptop 2013 models"
  ACPI / video: Add systems that should favour native backlight interface
  ACPI / video: Filter the _BCL table for duplicate brightness values

Merge branches 'acpi-cleanup', 'acpi-dock', 'acpi-pci' and 'acpi-dsm'

2014-02-21T00:27:48+00:00

* acpi-cleanup:
  ACPI / SBS: Fix incorrect sscanf() string

* acpi-dock:
  ACPI / dock: Make 'docked' sysfs attribute work as documented

* acpi-pci:
  ACPI / PCI: Fix memory leak in acpi_pci_irq_enable()

* acpi-dsm:
  ACPI / nouveau: fix probing regression related to _DSM

Revert "ACPI: Blacklist Win8 OSI for some HP laptop 2013 models"

2014-02-20T00:33:40+00:00

This reverts commit 2d4054d84224 (ACPI: Blacklist Win8 OSI for some HP
laptop 2013 models) that is not necessary any more after previous
commit 1811fcb029fa (ACPI / video: Add systems that should favour native
backlight interface).

Requested-by: Takashi Iwai 
Tested-by: Mika Westerberg 
Signed-off-by: Rafael J. Wysocki

ACPI / video: Add systems that should favour native backlight interface

2014-02-20T00:33:40+00:00

Some system's ACPI video backlight control interface is broken and the
native backlight control interface should be used by default. This patch
sets the use_native_backlight parameter to true for those systems so
that video backlight control interface will not be created. For detailed
models that are added here, reference the following list.

Note that the user specified kernel cmdline option will always have the
highest priority, i.e. if use_native_backlight=0 is specified and the
system is in the DMI table, the video module will not skip registering
backlight interface for it.

Thinkpad T430s:
Reported-by: Theodore Tso 
Reported-and-tested-by: Peter Weber 
References: https://bugzilla.kernel.org/show_bug.cgi?id=51231
Thinkpad X230:
Reported-and-tested-by: Igor Gnatenko 
References: https://bugzilla.kernel.org/show_bug.cgi?id=51231
ThinkPad X1 Carbon:
Reported-and-tested-by: Igor Gnatenko 
Lenovo Yoga 13:
Reported-by: Lennart Poettering 
Reported-and-tested-by: Kevin Smith 
References: https://bugzilla.kernel.org/show_bug.cgi?id=63811
Dell Inspiron 7520:
Reported-by: Rinat Ibragimov 
Acer Aspire 5733Z:
Reported-by: 
References: https://bugzilla.kernel.org/show_bug.cgi?id=62941
Acer Aspire V5-431:
Reported-by: Thomas Christensen 
References: https://bugzilla.kernel.org/show_bug.cgi?id=68751
HP ProBook 4340s:
Reported-and-tested-by: Vladimir Sherenkov 
References: http://redmine.russianfedora.pro/issues/1258
HP EliteBook/ProBook 2013 models, ZBook and some others:
Provided-by: Takashi Iwai 
Signed-off-by: Aaron Lu 
Tested-by: Mika Westerberg 
Signed-off-by: Rafael J. Wysocki

ACPI / video: Filter the _BCL table for duplicate brightness values

2014-02-20T00:33:40+00:00

Some devices have duplicate entries in there brightness levels table, ie
on my Dell Latitude E6430 the table looks like this:

[    3.686060] acpi backlight index   0, val 80
[    3.686095] acpi backlight index   1, val 50
[    3.686122] acpi backlight index   2, val 5
[    3.686147] acpi backlight index   3, val 5
[    3.686172] acpi backlight index   4, val 5
[    3.686197] acpi backlight index   5, val 5
[    3.686223] acpi backlight index   6, val 5
[    3.686248] acpi backlight index   7, val 5
[    3.686273] acpi backlight index   8, val 6
[    3.686332] acpi backlight index   9, val 7
[    3.686356] acpi backlight index  10, val 8
[    3.686380] acpi backlight index  11, val 9
etc.

Notice that brightness values 0-5 are all mapped to 5. This means that
if userspace writes any value between 0 and 5 to the brightness sysfs attribute
and then reads it, it will always return 0, which is somewhat unexpected.

This is a problem for ie gnome-settings-daemon, which uses read-modify-write
logic when the users presses the brightness up or down keys. This is done
this way to take brightness changes from other sources into account.

On this specific laptop what happens once the brightness has been set to 0,
is that gsd reads 0, adds 5, writes 5, and on the next brightness up key press
again reads 0, so things get stuck at the lowest brightness setting.

Filtering out the duplicate table entries, makes any write to brightness
read back as the written value as one would expect, fixing this.

Signed-off-by: Hans de Goede 
Reviewed-by: Aaron Lu 
Cc: All applicable 
Signed-off-by: Rafael J. Wysocki

ACPI / PCI: Fix memory leak in acpi_pci_irq_enable()

2014-02-18T14:47:23+00:00

acpi_pci_link_allocate_irq() can return negative gsi even if
entry != NULL.  For that case we have a memory leak, so free
entry before returning from acpi_pci_irq_enable() for gsi < 0.

Signed-off-by: Tomasz Nowicki 
Cc: All applicable 
[rjw: Subject and changelog]
Signed-off-by: Rafael J. Wysocki

ACPI / dock: Make 'docked' sysfs attribute work as documented

2014-02-15T00:29:06+00:00

After recent ACPI core changes acpi_bus_get_device() will always
succeed for dock station ACPI device objects, so show_docked()
should not use that function's return value as an indicator of
whether or not the dock device is present.

Make it use acpi_device_enumerated() for this purpose.

Fixes: 202317a573b2 (ACPI / scan: Add acpi_device objects for all device nodes in the namespace)
Signed-off-by: Rafael J. Wysocki

ACPI / SBS: Fix incorrect sscanf() string

2014-02-13T14:18:37+00:00

Fix incorrect sscanf() string in function acpi_battery_alarm_store().

Signed-off-by: Luis G.F 
Signed-off-by: Rafael J. Wysocki

ACPI / thermal: fix thermal driver compile error when CONFIG_PM_SLEEP is undefined

2014-02-13T14:13:45+00:00

The ACPI thermal driver defines acpi_thermal_resume() when
CONFIG_PM_SLEEP is defined. This results in the following compile
error when CONFIG_PM_SLEEP is undefined.

  CC      drivers/acpi/thermal.o
drivers/acpi/thermal.c:107:8: error: ‘acpi_thermal_resume’ undeclared here (not in a function)
make[2]: *** [drivers/acpi/thermal.o] Error 1

Signed-off-by: Shuah Khan 
Signed-off-by: Rafael J. Wysocki