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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPICA fixes from Rafael Wysocki:
- _INI regression fix from Tomasz Nowicki.
- Fix for a possible memory leak in _OSI support routine from Jung-uk
Kim.
- Fix for a possible buffer overflow during field unit read operation
from Bob Moore.
* tag 'acpi-fixes-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPICA: ACPICA: Fix for _INI regression
ACPICA: _OSI support: Fix possible memory leak
ACPICA: Fix possible buffer overflow during a field unit read operation
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This change fixes a problem introduced by recent commit c34c82b
(ACPICA: Predefine names: Add allowed argument types to master info
table) in 20130328 where _INI methods are no longer executed properly
because of a memory block that is not initialized properly. ACPICA
BZ1016. Tomasz Nowicki <tomasz.nowicki@linaro.org>
References: https://bugs.acpica.org/show_bug.cgi?id=1016
Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Fixes a possible memory leak in the error exit path introduced by
recent commit 388a990 ("ACPICA: _OSI Support: handle any errors from
acpi_os_acquire_mutex()").
[rjw: Changelog]
Signed-off-by: Jung-uk Kim <jkim@FreeBSD.org>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Can only happen under these conditions: 1) The DSDT version is 1,
meaning integers are 32-bits. 2) The field is between 33 and 64
bits long.
It applies cleanly back to ACPICA 20100806+ (Linux v2.6.37+).
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: 2.6.37+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS updates from Al Viro,
Misc cleanups all over the place, mainly wrt /proc interfaces (switch
create_proc_entry to proc_create(), get rid of the deprecated
create_proc_read_entry() in favor of using proc_create_data() and
seq_file etc).
7kloc removed.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (204 commits)
don't bother with deferred freeing of fdtables
proc: Move non-public stuff from linux/proc_fs.h to fs/proc/internal.h
proc: Make the PROC_I() and PDE() macros internal to procfs
proc: Supply a function to remove a proc entry by PDE
take cgroup_open() and cpuset_open() to fs/proc/base.c
ppc: Clean up scanlog
ppc: Clean up rtas_flash driver somewhat
hostap: proc: Use remove_proc_subtree()
drm: proc: Use remove_proc_subtree()
drm: proc: Use minor->index to label things, not PDE->name
drm: Constify drm_proc_list[]
zoran: Don't print proc_dir_entry data in debug
reiserfs: Don't access the proc_dir_entry in r_open(), r_start() r_show()
proc: Supply an accessor for getting the data from a PDE's parent
airo: Use remove_proc_subtree()
rtl8192u: Don't need to save device proc dir PDE
rtl8187se: Use a dir under /proc/net/r8180/
proc: Add proc_mkdir_data()
proc: Move some bits from linux/proc_fs.h to linux/{of.h,signal.h,tty.h}
proc: Move PDE_NET() to fs/proc/proc_net.c
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Supply a function (proc_remove()) to remove a proc entry (and any subtree
rooted there) by proc_dir_entry pointer rather than by name and (optionally)
root dir entry pointer. This allows us to eliminate all remaining pde->name
accesses outside of procfs.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Grant Likely <grant.likely@linaro.or>
cc: linux-acpi@vger.kernel.org
cc: openipmi-developer@lists.sourceforge.net
cc: devicetree-discuss@lists.ozlabs.org
cc: linux-pci@vger.kernel.org
cc: netdev@vger.kernel.org
cc: netfilter-devel@vger.kernel.org
cc: alsa-devel@alsa-project.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The only part of proc_dir_entry the code outside of fs/proc
really cares about is PDE(inode)->data. Provide a helper
for that; static inline for now, eventually will be moved
to fs/proc, along with the knowledge of struct proc_dir_entry
layout.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management and ACPI updates from Rafael J Wysocki:
- ARM big.LITTLE cpufreq driver from Viresh Kumar.
- exynos5440 cpufreq driver from Amit Daniel Kachhap.
- cpufreq core cleanup and code consolidation from Viresh Kumar and
Stratos Karafotis.
- cpufreq scalability improvement from Nathan Zimmer.
- AMD "frequency sensitivity feedback" powersave bias for the ondemand
cpufreq governor from Jacob Shin.
- cpuidle code consolidation and cleanups from Daniel Lezcano.
- ARM OMAP cpuidle fixes from Santosh Shilimkar and Daniel Lezcano.
- ACPICA fixes and other improvements from Bob Moore, Jung-uk Kim, Lv
Zheng, Yinghai Lu, Tang Chen, Colin Ian King, and Linn Crosetto.
- ACPI core updates related to hotplug from Toshi Kani, Paul Bolle,
Yasuaki Ishimatsu, and Rafael J Wysocki.
- Intel Lynxpoint LPSS (Low-Power Subsystem) support improvements from
Rafael J Wysocki and Andy Shevchenko.
* tag 'pm+acpi-3.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (192 commits)
cpufreq: Revert incorrect commit 5800043
cpufreq: MAINTAINERS: Add co-maintainer
cpuidle: add maintainer entry
ACPI / thermal: do not always return THERMAL_TREND_RAISING for active trip points
ARM: s3c64xx: cpuidle: use init/exit common routine
cpufreq: pxa2xx: initialize variables
ACPI: video: correct acpi_video_bus_add error processing
SH: cpuidle: use init/exit common routine
ARM: S5pv210: compiling issue, ARM_S5PV210_CPUFREQ needs CONFIG_CPU_FREQ_TABLE=y
ACPI: Fix wrong parameter passed to memblock_reserve
cpuidle: fix comment format
pnp: use %*phC to dump small buffers
isapnp: remove debug leftovers
ARM: imx: cpuidle: use init/exit common routine
ARM: davinci: cpuidle: use init/exit common routine
ARM: kirkwood: cpuidle: use init/exit common routine
ARM: calxeda: cpuidle: use init/exit common routine
ARM: tegra: cpuidle: use init/exit common routine for tegra3
ARM: tegra: cpuidle: use init/exit common routine for tegra2
ARM: OMAP4: cpuidle: use init/exit common routine
...
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* pm-cpuidle: (51 commits)
cpuidle: add maintainer entry
ARM: s3c64xx: cpuidle: use init/exit common routine
SH: cpuidle: use init/exit common routine
cpuidle: fix comment format
ARM: imx: cpuidle: use init/exit common routine
ARM: davinci: cpuidle: use init/exit common routine
ARM: kirkwood: cpuidle: use init/exit common routine
ARM: calxeda: cpuidle: use init/exit common routine
ARM: tegra: cpuidle: use init/exit common routine for tegra3
ARM: tegra: cpuidle: use init/exit common routine for tegra2
ARM: OMAP4: cpuidle: use init/exit common routine
ARM: shmobile: cpuidle: use init/exit common routine
ARM: tegra: cpuidle: use init/exit common routine
ARM: OMAP3: cpuidle: use init/exit common routine
ARM: at91: cpuidle: use init/exit common routine
ARM: ux500: cpuidle: use init/exit common routine
cpuidle: make a single register function for all
ARM: ux500: cpuidle: replace for_each_online_cpu by for_each_possible_cpu
cpuidle: remove en_core_tk_irqen flag
ARM: OMAP3: remove cpuidle_wrap_enter
...
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The en_core_tk_irqen flag is set in all the cpuidle driver which
means it is not necessary to specify this flag.
Remove the flag and the code related to it.
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org> # for mach-omap2/*
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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* acpi-assorted:
PCI / ACPI: Don't query OSC support with all possible controls
ACPI / processor_thermal: avoid null pointer deference error
ACPI / fan: avoid null pointer deference error
ACPI / video: Fix applying indexed initial brightness value.
ACPI / video: Make logic a little easier to understand.
ACPI / video: Fix brightness control initialization for some laptops.
ACPI: Use resource_size() in osl.c
ACPI / acpi_pad: Used PTR_RET
ACPI: suppress compiler warning in container.c
ACPI: suppress compiler warning in battery.c
ACPI: suppress compiler warnings in processor_throttling.c
ACPI: suppress compiler warnings in button.c
ACPI: replace kmalloc+memcpy with kmemdup
ACPI: Remove acpi_pci_bind_root() definition
ACPI video: ignore BIOS backlight value for HP dm4
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* acpi-pm:
ACPI / PM: Fix potential problem in acpi_device_get_power()
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* acpica: (22 commits)
ACPI: Set length even for TYPE_END_TAG acpi resource
ACPICA: Update version to 20130214
ACPICA: Object repair: Allow 0-length packages for variable-length packages
ACPICA: Disassembler: Add warnings for unresolved control methods
ACPICA: Return object repair: Add resource template repairs
ACPICA: Return object repair: Add string-to-unicode conversion
ACPICA: Split object conversion functions to a new file
ACPICA: Add mechanism for early object repairs on a per-name basis
ACPICA: Remove trailing comma in enum declarations
ACPICA: Add exception descriptions to exception info table
ACPICA: Add macros to exception code definitions
ACPICA: Regression fix: reinstate safe exit macros
ACPICA: Update for ACPI 5 hardware-reduced feature
ACPICA: Add parens within macros around parameter names
ACPICA: Add macros to access pointer to next object in the descriptor list
ACPICA: Update error/debug messages for fixed events
ACPICA: Fix a long-standing bug in local cache
ACPICA: iASL/Disassembler: Add support for MTMR table
ACPICA: iASL/Disassembler: Add support for VRTC table
ACPICA: Update RASF table definition
...
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* acpi-lpss:
ACPI / LPSS: make code less confusing for reader
ACPI / LPSS: Add support for exposing LTR registers to user space
ACPI / scan: Add special handler for Intel Lynxpoint LPSS devices
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* acpi-hotplug:
ACPI / memhotplug: Remove info->failed bit
ACPI / memhotplug: set info->enabled for memory present at boot time
ACPI: Verify device status after eject
acpi: remove reference to ACPI_HOTPLUG_IO
ACPI: Update _OST handling for notify
ACPI: Update PNPID match handling for notify
ACPI: Update PNPID set/free interfaces
ACPI: Remove acpi_device dependency in acpi_device_set_id()
ACPI / hotplug: Make acpi_hotplug_profile_ktype static
ACPI / scan: Make memory hotplug driver use struct acpi_scan_handler
ACPI / container: Use hotplug profile user space interface
ACPI / hotplug: Introduce user space interface for hotplug profiles
ACPI / scan: Introduce acpi_scan_handler_matching()
ACPI / container: Use common hotplug code
ACPI / scan: Introduce common code for ACPI-based device hotplug
ACPI / scan: Introduce acpi_scan_match_handler()
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* acpi-assorted: (21 commits)
ACPI / thermal: do not always return THERMAL_TREND_RAISING for active trip points
ACPI: video: correct acpi_video_bus_add error processing
ACPI: Fix wrong parameter passed to memblock_reserve
acpi: video: enhance the quirk detect logic of _BQC
ACPI: update comments for acpi_event_status
ACPI: remove "config ACPI_DEBUG_FUNC_TRACE"
PCI / ACPI: Don't query OSC support with all possible controls
ACPI / processor_thermal: avoid null pointer deference error
ACPI / fan: avoid null pointer deference error
ACPI / video: Fix applying indexed initial brightness value.
ACPI / video: Make logic a little easier to understand.
ACPI / video: Fix brightness control initialization for some laptops.
ACPI: Use resource_size() in osl.c
ACPI / acpi_pad: Used PTR_RET
ACPI: suppress compiler warning in container.c
ACPI: suppress compiler warning in battery.c
ACPI: suppress compiler warnings in processor_throttling.c
ACPI: suppress compiler warnings in button.c
ACPI: replace kmalloc+memcpy with kmemdup
ACPI: Remove acpi_pci_bind_root() definition
...
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points
Commit 4ae46be "Thermal: Introduce thermal_zone_trip_update()"
introduced a regression causing the fan to be always on even when
the system is idle.
My original idea in that commit is that:
- when the current temperature is above the trip point,
keep the fan on, even if the temperature is dropping.
- when the current temperature is below the trip point,
turn on the fan when the temperature is raising,
turn off the fan when the temperature is dropping.
But this is what the code actually does:
- when the current temperature is above the trip point,
the fan keeps on.
- when the current temperature is below the trip point,
the fan is always on because thermal_get_trend()
in driver/acpi/thermal.c returns THERMAL_TREND_RAISING.
Thus the fan keeps running even if the system is idle.
Fix this in drivers/acpi/thermal.c.
[rjw: Changelog]
References: https://bugzilla.kernel.org/show_bug.cgi?id=56591
References: https://bugzilla.kernel.org/show_bug.cgi?id=56601
References: https://bugzilla.kernel.org/show_bug.cgi?id=50041#c45
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Matthias <morpheusxyz123@yahoo.de>
Tested-by: Ville Syrjälä <syrjala@sci.fi>
Cc: 3.7+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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acpi_video_bus_get_devices() may fail due to some video output device
doesn't have the _ADR method, and in this case, the error processing
is to simply free the video structure in acpi_video_bus_add(), while
leaving those already registered video output devices in the wild,
which means for some video output device, we have already registered
a backlight interface and installed a notification handler for it.
So it can happen when user is using this system, on hotkey pressing,
the notification handler will send a keycode through a non-existing
input device, causing kernel freeze.
To solve this problem, free all those already registered video output
devices once something goes wrong in acpi_video_bus_get_devices(), so
that no wild backlight interfaces and notification handlers exist.
References: https://bugzilla.kernel.org/show_bug.cgi?id=51731
Reported-and-tested-by: <i-tek@web.de>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Commit 53aac44 (ACPI: Store valid ACPI tables passed via early initrd
in reserved memblock areas) introduced acpi_initrd_override() that
passes a wrong value as the second argument to memblock_reserve().
Namely, the second argument of memblock_reserve() is the size of the
region, not the address of the top of it, so make
acpi_initrd_override() pass the size in there as appropriate.
[rjw: Changelog]
Signed-off-by: Wang YanQing <udknight@gmail.com>
Acked-by: Yinghai Lu <yinghai@kernel.org>
Cc: 3.8+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Currently we decide if the _BQC is using index by first setting the
level to maximum, and then check if _BQC returned maximum; if not, we
say it is using index.
This is not true for some buggy systems, where the _BQC method will
always return a constant value(e.g. 0 or 100 for the two broken system)
and thus break the current logic. So this patch tries to enhance the
quirk detect logic for _BQC: we do this by picking a test_level, it can
be the maximum level or the mininum one based on some condition. And we
don't make the assumption that if _BQC returned a value that is not what
we just set, it must be using an index. Instead, we will compare the
value returned from _BQC and if it doesn't match, see if the returned
value is an index. And if still no, clear the capability of _BQC.
References: https://bugzilla.kernel.org/show_bug.cgi?id=42861
References: https://bugzilla.kernel.org/show_bug.cgi?id=56011
Reported-and-tested-by: Artem Savkov <artem.savkov@gmail.com>
Reported-by: Luis Medinas <lmedinas@gmail.com>
Reported-by: Cheppes <cheppes@mailinator.com>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Kconfig symbol ACPI_DEBUG_FUNC_TRACE was only used (through its
corresponding macro) in drivers/acpi/acpica/acmacros.h. That macro
was removed from that header in v3.8, with commit
86ff0e508f88eda6e479a897476026055831d2d8 ("ACPICA: Fix unmerged
acmacros.h divergences."), so ACPI_DEBUG_FUNC_TRACE can now be
removed too, as it is unused.
[rjw: Changelog]
Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Found problem on system that firmware that could handle pci aer.
Firmware get error reporting after pci injecting error, before os boots.
But after os boots, firmware can not get report anymore, even pci=noaer
is passed.
Root cause: BIOS _OSC has problem with query bit checking.
It turns out that BIOS vendor is copying example code from ACPI Spec.
In ACPI Spec 5.0, page 290:
If (Not(And(CDW1,1))) // Query flag clear?
{ // Disable GPEs for features granted native control.
If (And(CTRL,0x01)) // Hot plug control granted?
{
Store(0,HPCE) // clear the hot plug SCI enable bit
Store(1,HPCS) // clear the hot plug SCI status bit
}
...
}
When Query flag is set, And(CDW1,1) will be 1, Not(1) will return 0xfffffffe.
So it will get into code path that should be for control set only.
BIOS acpi code should be changed to "If (LEqual(And(CDW1,1), 0)))"
Current kernel code is using _OSC query to notify firmware about support
from OS and then use _OSC to set control bits.
During query support, current code is using all possible controls.
So will execute code that should be only for control set stage.
That will have problem when pci=noaer or aer firmware_first is used.
As firmware have that control set for os aer already in query support stage,
but later will not os aer handling.
We should avoid passing all possible controls, just use osc_control_set
instead.
That should workaround BIOS bugs with affected systems on the field
as more bios vendors are copying sample code from ACPI spec.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Fix a null pointer deference by acpi_driver_data() if device is
null. We should only set pr and check this is OK after we are
sure device is not null.
Smatch analysis:
drivers/acpi/processor_thermal.c:223 processor_get_max_state() warn:
variable dereferenced before check 'device' (see line 221)
drivers/acpi/processor_thermal.c:237 processor_get_cur_state() warn:
variable dereferenced before check 'device' (see line 235)
drivers/acpi/processor_thermal.c:255 processor_set_cur_state() warn:
variable dereferenced before check 'device' (see line 251)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Fix a null pointer deference by acpi_driver_data() if device is
null. We should only set cdev and check this is OK after we are
sure device is not null.
Smatch analysis:
drivers/acpi/fan.c:179 acpi_fan_remove() warn: variable dereferenced
before check 'device' (see line 177)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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The value initially read via _BQC also needs to be offset by 2 to
compensate for the first 2 special items in _BCL. Introduce a helper
function that does the BQC-value-to-level conversion in order to not
needlessly duplicate code.
Signed-off-by: Danny Baumann <dannybaumann@web.de>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Make code paths a little easier to follow, and don't needlessly continue
list iteration.
Signed-off-by: Danny Baumann <dannybaumann@web.de>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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In particular, this fixes brightness control initialization for all
devices that return index values from _BQC and don't happen to have the
initial index set by the BIOS in their _BCL table. One example for that
is the Dell Inspiron 15R SE (model number 7520).
What happened for those devices is that acpi_init_brightness queried the
initial brightness by calling acpi_video_device_lcd_get_level_current.
This called _BQC, which returned e.g. 13. As _BQC_use_index isn't
determined at this point (and thus has its initial value of 0), the
index isn't converted into the actual level. As '13' isn't present in
the _BCL list, *level is later overwritten with brightness->curr, which
was initialized to max_level (100) before. Later in
acpi_init_brightness, level_old (with the value 100) is used as an index
into the _BCL table, which causes a value outside of the actual table to
be used as input into acpi_video_device_lcd_set_level(). Depending on
the (undefined) value of that location, this call will fail, causing the
brightness control for the device in question not to be enabled.
Fix that by returning the raw value returned by the _BQC call in the
initialization case.
Signed-off-by: Danny Baumann <dannybaumann@web.de>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Use the resource_size() function instead of explicit computation.
[rjw: Subject and changelog]
Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Use PTR_RET instead of explicit checking with IS_ERR.
Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This patch fixes following compiler warning when build via make W=1:
drivers/acpi/container.c:183:116: warning: no previous prototype for ‘acpi_container_init’ [-Wmissing-prototypes]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This patch fixes following compiler warning when build via make W=1:
drivers/acpi/battery.c:149:52: warning: no previous prototype for ‘acpi_battery_present’ [-Wmissing-prototypes]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This patch fixes following compiler warnings when build via make W=1:
drivers/acpi/processor_throttling.c: In function ‘acpi_processor_throttling_init’:
drivers/acpi/processor_throttling.c:216:40: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This patch fixes following compiler warnings when build via make W=1:
drivers/acpi/button.c:220:5: warning: no previous prototype for ‘acpi_lid_notifier_register’ [-Wmissing-prototypes]
drivers/acpi/button.c:226:5: warning: no previous prototype for ‘acpi_lid_notifier_unregister’ [-Wmissing-prototypes]
drivers/acpi/button.c:232:5: warning: no previous prototype for ‘acpi_lid_open’ [-Wmissing-prototypes]
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Replace the combination of kmalloc() and memcpy() in acpi_run_osc()
with a single call to kmemdup().
[rjw: Changelog]
Signed-off-by: Andrei Epure <epure.andrei@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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On a HP Pavilion dm4 laptop the BIOS sets minimum backlight on boot,
completely dimming the screen. Ignore this initial value for this
machine.
Signed-off-by: Gustavo Maciel Dias Vieira <gustavo@sagui.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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* acpi-pm:
ACPI / PM: Expose lists of device wakeup power resources to user space
ACPI / PM: Fix potential problem in acpi_device_get_power()
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Commit 18a3870 (ACPI / PM: Expose lists of device power resources
to user space) exposed the lists of ACPI power resources associated
with power states of ACPI devices, but it didn't expose the lists
of ACPI wakeup power resources, which also is necessary to get the
full picture of dependencies between ACPI devices and power
resources.
For this reason, for every ACPI device node having a list of ACPI
wakeup power resources associated with it, expose that list to user
space in analogy with commit 18a3870.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Theoretically, in some situations acpi_device_get_power() may return
an incorrect result, because the settings of the power resources
depended on by the device may indicate a power state shallower than
the actual power state of the device.
Say that two devices, A and B, depend on two power resources, X and
Y, in such a way that _PR0 for both A and B list both X and Y and
_PR3 for both A and B list power resource Y alone. Also suppose
that _PS0 and _PS3 are present for both A and B. Then, if devices
A and B are initially in D0, power resources X and Y are initially
"on" and their reference counters are equal to 2. To put device A
into power state D3hot the kernel will decrement the reference
counter of power resource X, but that power resource won't be turned
off, because it is still in use by device B (its reference counter is
equal to 1). Next, _PS3 will be executed for device A. Afterward
the configuration of the power resources will indicate that device
A is in power state D0 (both X and Y are "on"), but in fact it is
in D3hot (because _PS3 has been executed for it).
In that situation, if acpi_device_get_power() is called to get the
power state of device A, it will first execute _PSC for it which
should return 3. That will cause acpi_device_get_power() to run
acpi_power_get_inferred_state() for device A and the resultant power
state will be D0, which is incorrect.
To fix that change acpi_device_get_power() to first execute
acpi_power_get_inferred_state() for the given device (if it
depends on power resources) and to evaluate _PSC for it subsequently,
so that the result inferred from the power resources configuration
can be amended by the _PSC return value.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Aaron Lu <aaron.lu@intel.com>
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* acpica: (33 commits)
ACPICA: Update version to 20130328
ACPICA: Add a lock to the internal object reference count mechanism
ACPICA: Fix a format string for 64-bit generation
ACPICA: Remove FORCE_DELETE option for global reference count mechanism
ACPICA: Improve error message for Index() operator
ACPICA: FADT: Remove extraneous warning for very large GPE registers
ACPICA: Fix a typo in a function header, no functional change
ACPICA: Fix a typo in an error message
ACPICA: Fix for some comments/headers
ACPICA: _OSI Support: handle any errors from acpi_os_acquire_mutex()
ACPICA: Predefine names: Add allowed argument types to master info table
ACPI: Set length even for TYPE_END_TAG acpi resource
ACPICA: Update version to 20130214
ACPICA: Object repair: Allow 0-length packages for variable-length packages
ACPICA: Disassembler: Add warnings for unresolved control methods
ACPICA: Return object repair: Add resource template repairs
ACPICA: Return object repair: Add string-to-unicode conversion
ACPICA: Split object conversion functions to a new file
ACPICA: Add mechanism for early object repairs on a per-name basis
ACPICA: Remove trailing comma in enum declarations
...
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Certain external interfaces need to update object references
without holding the interpreter or namespace mutex objects. To
prevent race conditions, add a spinlock around the increment
and decrement of the reference counts for internal ACPI
objects. Reported by Andriy Gapon (avg@FreeBSD.org).
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Andriy Gapon <avg@FreeBSD.org>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Fix a warning on 64-bit for a length value. Cast to 32-bit since
the length is related to an ACPI table.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This option is not used and is obsolete.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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For the case where an attempt is made to take an Index() beyond
the end of a String, Buffer, or Package, emit the actual length
of the object to the error message. Helpful for debugging.
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This change removes a size mismatch warning if the legacy
length field for a GPE register set is larger than the 64-bit
GAS structure can accomodate. GPE register sets can be larger
than the 255 bit limitation of the GAS structure. Linn Crosetto
(linn@hp.com).
Signed-off-by: Linn Crosetto <linn@hp.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Reported by Colin King.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Remove an extraneous minus/dash. Reported by Colin Ian King.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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No functional change. Includes parameter rename from Tang Chen.
Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Check for any errors. Handles possible timeout case if
ACPI_WAIT_FOREVER is changed to be less than "forever".
Jung-uk Kim.
Signed-off-by: Jung-uk Kim <jkim@FreeBSD.org>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This change adds the infrastructure to enable typechecking
on incoming arguments for the predefined methods/objects. It
does not actually contain the code that will fully utilize this
information. Also condenses some duplicate code for the predefined
names into a new module, utilities/utpredef.c
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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Found with a network device in QEMU/KVM guest not working anymore.
Bisected to commit c13085e5
ACPICA: Resource Mgr: Prevent infinite loops in resource walks
That commit will check acpi_resource length strictly which causes
acpi_set_current_resources to return failure and IRQ for PCI
devices is not set properly.
Set length for all those TYPE_END_TAG acpi_resources.
[rjw: Changelog]
Bisected-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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