Commit Graph

377515 Commits

Author SHA1 Message Date
Rafael J. Wysocki
2cc6ced132 Merge branch 'pm-cpufreq'
* pm-cpufreq:
  cpufreq: don't leave stale policy pointer in cdbs->cur_policy
  acpi-cpufreq: Add new sysfs attribute freqdomain_cpus
  cpufreq: make sure frequency transitions are serialized
2013-06-29 15:04:07 +02:00
Rafael J. Wysocki
867a420b22 Merge branch 'pm-assorted'
* pm-assorted:
  PM / Sleep: Warn about system time after resume with pm_trace
2013-06-29 15:03:51 +02:00
Rafael J. Wysocki
5c0b1b2003 Merge branch 'acpi-assorted'
* acpi-assorted:
  ACPI: implement acpi_os_get_timer() according the spec
2013-06-29 15:03:44 +02:00
Rafael J. Wysocki
d5ba5b141d Merge branch 'acpi-pm'
* acpi-pm:
  ACPI / PM: Fix possible NULL pointer deref in acpi_pm_device_sleep_state()
2013-06-29 15:03:38 +02:00
Rafael J. Wysocki
996e2569da Merge branch 'acpi-hotplug'
* acpi-hotplug:
  ACPI / processor: Drop unused variable from processor_perflib.c
  ACPI / processor: Remove unused macros in processor_driver.c
2013-06-29 15:03:26 +02:00
Rafael J. Wysocki
e52cff8bdd Merge branch 'pm-assorted'
* pm-assorted:
  PM / QoS: Add pm_qos and dev_pm_qos to events-power.txt
  PM / QoS: Add dev_pm_qos_request tracepoints
  PM / QoS: Add pm_qos_request tracepoints
  PM / QoS: Add pm_qos_update_target/flags tracepoints
  PM / QoS: Update Documentation/power/pm_qos_interface.txt
  PM / Sleep: Print last wakeup source on failed wakeup_count write
  PM / QoS: correct the valid range of pm_qos_class
  PM / wakeup: Adjust messaging for wake events during suspend
  PM / Runtime: Update .runtime_idle() callback documentation
  PM / Runtime: Rework the "runtime idle" helper routine
  PM / Hibernate: print physical addresses consistently with other parts of kernel
2013-06-28 13:01:40 +02:00
Rafael J. Wysocki
405a1086bd Merge branch 'pm-cpufreq'
* pm-cpufreq: (41 commits)
  cpufreq: tegra: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: s3c64xx: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: omap: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: imx6q: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: exynos: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: dbx500: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: powernow-k8: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: pcc: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: e_powersaver: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: ACPI: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: s3c2416: fix forgotten driver_data conversions
  cpufreq: make __cpufreq_notify_transition() static
  cpufreq: Fix minor formatting issues
  cpufreq: Fix governor start/stop race condition
  cpufreq: Simplify userspace governor
  cpufreq: X86_AMD_FREQ_SENSITIVITY: select CPU_FREQ_TABLE
  cpufreq: tegra: create CONFIG_ARM_TEGRA_CPUFREQ
  cpufreq: S3C2416/S3C64XX: select CPU_FREQ_TABLE
  ...
2013-06-28 13:01:34 +02:00
Rafael J. Wysocki
52388492ea Merge branch 'pm-omap'
* pm-omap:
  PM / AVS: SmartReflex: use devm_* API to initialize SmartReflex
  PM / AVS: SmartReflex: use omap_sr * for enable/disable interface
  PM / AVS: SmartReflex: use omap_sr * for minmax interfaces
  PM / AVS: SmartReflex: use omap_sr * for errgen interfaces
  PM / AVS: SmartReflex: fix driver name
  PM / AVS: SmartReflex: disable runtime PM on driver remove
  PM / AVS: SmartReflex: disable errgen before vpbound disable
2013-06-28 13:01:22 +02:00
Rafael J. Wysocki
ceaed1e394 Merge branch 'pm-devfreq'
* pm-devfreq:
  MAINTAINERS: update mailing list for devfreq(DVFS).
  PM / devfreq: fix typo "CPU_EXYNOS4.12" twice
  PM / devfreq: fix missing unlock on error in exynos4_busfreq_pm_notifier_event()
  PM / devfreq: add comments and Documentation
  PM / devfreq: account suspend/resume for stats
  PM / devfreq: Add Exynos5-bus devfreq driver for Exynos5250
  PM / devfreq: Move exynos4 devfreq driver into a new sub-directory
2013-06-28 13:01:13 +02:00
Rafael J. Wysocki
93bc11c3cc Merge branch 'pm-cpuidle'
* pm-cpuidle:
  cpuidle: Fix ARCH_NEEDS_CPU_IDLE_COUPLED dependency warning
  cpuidle: Comment the driver's framework code
  cpuidle: simplify multiple driver support
  ARM: zynq: Add cpuidle support
  cpuidle: improve governor Kconfig options
2013-06-28 13:01:06 +02:00
Rafael J. Wysocki
3e79a8a67d Merge branch 'pnp'
* pnp:
  pnp: restore automatic resolution of DMA conflicts
2013-06-28 13:00:57 +02:00
Rafael J. Wysocki
207bc1181b Merge branch 'freezer'
* freezer:
  af_unix: use freezable blocking calls in read
  sigtimedwait: use freezable blocking call
  nanosleep: use freezable blocking call
  futex: use freezable blocking call
  select: use freezable blocking call
  epoll: use freezable blocking call
  binder: use freezable blocking calls
  freezer: add new freezable helpers using freezer_do_not_count()
  freezer: convert freezable helpers to static inline where possible
  freezer: convert freezable helpers to freezer_do_not_count()
  freezer: skip waking up tasks with PF_FREEZER_SKIP set
  freezer: shorten freezer sleep time using exponential backoff
  lockdep: check that no locks held at freeze time
  lockdep: remove task argument from debug_check_no_locks_held
  freezer: add unsafe versions of freezable helpers for CIFS
  freezer: add unsafe versions of freezable helpers for NFS
2013-06-28 13:00:53 +02:00
Rafael J. Wysocki
e8b6cb3947 Merge branch 'acpi-doc'
* acpi-doc:
  Documentation / CPU hotplug: Rephrase the outdated description for MADT entries
  ACPI / video: update video_extension.txt for backlight control
  ACPI / video: move video_extension.txt to Documentation/acpi
  ACPI / video: add description for brightness_switch_enabled
  ACPI: Add ACPI namespace documentation
  ACPI: Add sysfs ABI documentation
  ACPI: Update MAINTAINERS file to include Documentation/acpi
2013-06-28 13:00:45 +02:00
Rafael J. Wysocki
bdc8f09685 Merge branch 'acpi-assorted'
* acpi-assorted:
  ACPI / EC: Add HP Folio 13 to ec_dmi_table in order to skip DSDT scan
  ACPI: Add CMOS RTC Operation Region handler support
  ACPI: Remove unused flags in acpi_device_flags
  ACPI: Remove useless initializers
  ACPI / battery: Make sure all spaces are in correct places
  ACPI: add _STA evaluation at do_acpi_find_child()
  ACPI / EC: access user space with get_user()/put_user()
2013-06-28 13:00:38 +02:00
Rafael J. Wysocki
f4c9f40238 Merge branch 'acpi-lpss'
* acpi-lpss:
  ACPI / LPSS: override SDIO private register space size from ACPI tables
  ACPI / LPSS: mask the UART TX completion interrupt
  ACPI / LPSS: add support for Intel BayTrail

Conflicts:
	drivers/acpi/acpi_lpss.c (with commit b9e95fc)
2013-06-28 12:59:02 +02:00
Rafael J. Wysocki
3b4550e0e0 Merge branch 'acpi-pm'
* acpi-pm:
  ACPI / PM: Rework and clean up acpi_dev_pm_get_state()
  ACPI / PM: Replace ACPI_STATE_D3 with ACPI_STATE_D3_COLD in device_pm.c
  ACPI / PM: Rename function acpi_device_power_state() and make it static
  ACPI / PM: acpi_processor_suspend() can be static
  xen / ACPI / sleep: Register an acpi_suspend_lowlevel callback.
  x86 / ACPI / sleep: Provide registration for acpi_suspend_lowlevel.
2013-06-28 12:58:30 +02:00
Rafael J. Wysocki
8e9914d5ef Merge branch 'acpi-scan'
* acpi-scan:
  ACPI / scan: Do not bind ACPI drivers to objects with scan handlers
  ACPI / ia64 / sba_iommu: Use ACPI scan handler for device discovery
  ACPI / scan: Simplify ACPI driver probing
2013-06-28 12:58:21 +02:00
Rafael J. Wysocki
80338681bb Merge branch 'acpica'
* acpica: (21 commits)
  ACPICA: Update version to 20130517
  ACPICA: _CST repair: Handle null package entries
  ACPICA: Add several repairs for _CST predefined name
  ACPICA: Move _PRT repair into the standard complex repair module
  ACPICA: Clear events initialized flag upon event component termination
  ACPICA: Fix possible memory leak in GPE init error path
  ACPICA: ACPICA Termination: Delete global lock pending lock
  ACPICA: Update interface to acpi_ut_valid_acpi_name()
  ACPICA: Do not use extended sleep registers unless HW-reduced bit is set
  ACPICA: Split table print utilities to a new a separate file
  ACPICA: Add option to disable loading of SSDTs from the RSDT/XSDT
  ACPICA: Standardize all switch() blocks
  ACPICA: Split internal error msg routines to a separate file
  ACPICA: Split buffer dump routines into separate file
  ACPICA: Update version to 20130418
  ACPICA: Update for "orphan" embedded controller _REG method support
  ACPICA: Remove unused macros, no functional change
  ACPICA: Predefined name support: Remove unused local variable
  ACPICA: Add argument typechecking for all predefined ACPI names
  ACPICA: Add BIOS error interface for predefined name validation support
  ...
2013-06-28 12:58:14 +02:00
Rafael J. Wysocki
a204dbc61b Merge branch 'acpi-hotplug'
* acpi-hotplug:
  ACPI: Do not use CONFIG_ACPI_HOTPLUG_MEMORY_MODULE
  ACPI / cpufreq: Add ACPI processor device IDs to acpi-cpufreq
  Memory hotplug: Move alternative function definitions to header
  ACPI / processor: Fix potential NULL pointer dereference in acpi_processor_add()
  Memory hotplug / ACPI: Simplify memory removal
  ACPI / scan: Add second pass of companion offlining to hot-remove code
  Driver core / MM: Drop offline_memory_block()
  ACPI / processor: Pass processor object handle to acpi_bind_one()
  ACPI: Drop removal_type field from struct acpi_device
  Driver core / memory: Simplify __memory_block_change_state()
  ACPI / processor: Initialize per_cpu(processors, pr->id) properly
  CPU: Fix sysfs cpu/online of offlined CPUs
  Driver core: Introduce offline/online callbacks for memory blocks
  ACPI / memhotplug: Bind removable memory blocks to ACPI device nodes
  ACPI / processor: Use common hotplug infrastructure
  ACPI / hotplug: Use device offline/online for graceful hot-removal
  Driver core: Use generic offline/online for CPU offline/online
  Driver core: Add offline/online device operations
2013-06-28 12:58:05 +02:00
Rafael J. Wysocki
9b5c7a5a97 ACPI / PM: Fix possible NULL pointer deref in acpi_pm_device_sleep_state()
After commit fa1675b (ACPI / PM: Rework and clean up
acpi_dev_pm_get_state()) a NULL pointer dereference will take place
if NULL is passed to acpi_pm_device_sleep_state() as the second
argument.

Fix that by avoiding to use the pointer that may be NULL until
it's necessary to store a return value at the location pointed to
by it (if not NULL).

Reported-and-tested-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-28 12:55:59 +02:00
Shuah Khan
9dceefe483 PM / Sleep: Warn about system time after resume with pm_trace
pm_trace uses the system's Real Time Clock (RTC) to save the magic
number.  The reason for this is that the RTC is the only reliably
available piece of hardware during resume operations where a value
can be set that will survive a reboot.

Consequence is that after a resume (even if it is successful) your
system clock will have a value corresponding to the magic number
instead of the correct date/time!  It is therefore advisable to use
a program like ntp-date or rdate to reset the correct date/time from
an external time source when using this trace option.

There is no run-time message to warn users of the consequences of
enabling pm_trace.  Adding a warning message to pm_trace_store()
will serve as a reminder to users to set the system date and time
after resume.

Signed-off-by: Shuah Khan <shuah.kh@samsung.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-27 22:14:46 +02:00
Jacob Shin
419e172145 cpufreq: don't leave stale policy pointer in cdbs->cur_policy
Clear ->cur_policy when stopping a governor, or the ->cur_policy
pointer may be stale on systems with have_governor_per_policy when a
new policy is allocated due to CPU hotplug offline/online.

[rjw: Changelog]
Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-27 22:02:12 +02:00
Rafael J. Wysocki
874e628f8b Merge branch 'pm-fixes' into pm-cpufreq
A subsequent commit depends on the 'pm-fixes' commits.
2013-06-27 22:01:35 +02:00
Lan Tianyu
f4fd379784 acpi-cpufreq: Add new sysfs attribute freqdomain_cpus
Commits fcf8058 (cpufreq: Simplify cpufreq_add_dev()) and aa77a52
(cpufreq: acpi-cpufreq: Don't set policy->related_cpus from .init())
changed the contents of the "related_cpus" sysfs attribute on systems
where acpi-cpufreq is used and user space can't get the list of CPUs
which are in the same hardware coordination CPU domain (provided by
the ACPI AML method _PSD) via "related_cpus" any more.

To make up for that loss add a new sysfs attribute "freqdomian_cpus"
for the acpi-cpufreq driver which exposes the list of CPUs in the
same domain regardless of whether it is coordinated by hardware or
software.

[rjw: Changelog, documentation]
References: https://bugzilla.kernel.org/show_bug.cgi?id=58761
Reported-by: Jean-Philippe Halimi <jean-philippe.halimi@exascale-computing.eu>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-27 21:51:09 +02:00
Viresh Kumar
7c30ed532c cpufreq: make sure frequency transitions are serialized
Whenever we are changing frequency of a cpu, we are calling PRECHANGE and
POSTCHANGE notifiers. They must be serialized. i.e. PRECHANGE or POSTCHANGE
shouldn't be called twice contiguously.

This can happen due to bugs in users of __cpufreq_driver_target() or actual
cpufreq drivers who are sending these notifiers.

This patch adds some protection against this. Now, we keep track of the last
transaction and see if something went wrong.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-27 21:49:55 +02:00
Rafael J. Wysocki
e11158c0c9 Merge branch 'pm-cpufreq-arm' into pm-cpufreq
* pm-cpufreq-arm:
  cpufreq: tegra: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: s3c64xx: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: omap: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: imx6q: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: exynos: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: dbx500: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: s3c2416: fix forgotten driver_data conversions
2013-06-27 21:47:03 +02:00
Rafael J. Wysocki
39a95f4861 Merge branch 'pm-cpufreq-assorted' into pm-cpufreq
* pm-cpufreq-assorted: (21 commits)
  cpufreq: powernow-k8: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: pcc: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: e_powersaver: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: ACPI: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: make __cpufreq_notify_transition() static
  cpufreq: Fix minor formatting issues
  cpufreq: Fix governor start/stop race condition
  cpufreq: Simplify userspace governor
  cpufreq: powerpc: move cpufreq driver to drivers/cpufreq
  cpufreq: kirkwood: Select CPU_FREQ_TABLE option
  cpufreq: big.LITTLE needs cpufreq table
  cpufreq: SPEAr needs cpufreq table
  cpufreq: powerpc: Add cpufreq driver for Freescale e500mc SoCs
  cpufreq: remove unnecessary cpufreq_cpu_{get|put}() calls
  cpufreq: MAINTAINERS: Add git tree path for ARM specific updates
  cpufreq: rename index as driver_data in cpufreq_frequency_table
  cpufreq: Don't create empty /sys/devices/system/cpu/cpufreq directory
  cpufreq: Move get_cpu_idle_time() to cpufreq.c
  cpufreq: governors: Move get_governor_parent_kobj() to cpufreq.c
  cpufreq: Add EXPORT_SYMBOL_GPL for have_governor_per_policy
  ...
2013-06-27 21:46:45 +02:00
Rafael J. Wysocki
7ae9b27b2a Merge branch 'pm-cpufreq-Kconfig' into pm-cpufreq
* pm-cpufreq-Kconfig:
  cpufreq: X86_AMD_FREQ_SENSITIVITY: select CPU_FREQ_TABLE
  cpufreq: tegra: create CONFIG_ARM_TEGRA_CPUFREQ
  cpufreq: S3C2416/S3C64XX: select CPU_FREQ_TABLE
  cpufreq: pxa: select CPU_FREQ_TABLE
  cpufreq: powerpc: CBE_RAS: select CPU_FREQ_TABLE
  cpufreq: imx: select CPU_FREQ_TABLE
  cpufreq: highbank: remove select CPU_FREQ_TABLE
  cpufreq: exynos: select CPU_FREQ_TABLE
  cpufreq: davinci: select CPU_FREQ_TABLE
  cpufreq: cris: select CPU_FREQ_TABLE
  cpufreq: blackfin: enable driver for CONFIG_BFIN_CPU_FREQ
2013-06-27 21:44:48 +02:00
Mika Westerberg
10619066a3 ACPI: implement acpi_os_get_timer() according the spec
ACPI Timer() opcode should return monotonically increasing clock with 100ns
granularity according the ACPI 5.0 spec.

Testing the current Timer() implementation with following ASL code (and an
additional debug print in acpi_os_sleep() to get the sleep times dumped out
to dmesg):

	// Test: 10ms
	Store(Timer, Local1)
	Sleep(10)
	Divide(Subtract(Timer, Local1), 10000,, Local1)
	Sleep(Local1)

	// Test: 200ms
	Store(Timer, Local1)
	Sleep(200)
	Divide(Subtract(Timer, Local1), 10000,, Local1)
	Sleep(Local1)

	// Test 1300ms
	Store(Timer, Local1)
	Sleep(1300)
	Divide(Subtract(Timer, Local1), 10000,, Local1)
	Sleep(Local1)

The second sleep value is calculated using Timer(). If the implementation
is good enough we should be able to get the second value pretty close to
the first.

However, the current Timer() gives pretty bad sleep times:

	[   11.488100] ACPI: acpi_os_get_timer() TBD
	[   11.492150] ACPI: Sleep(10)
	[   11.502993] ACPI: Sleep(0)
	[   11.506315] ACPI: Sleep(200)
	[   11.706237] ACPI: Sleep(0)
	[   11.709550] ACPI: Sleep(1300)
	[   13.008929] ACPI: Sleep(0)

Fix this with the help of ktime_get(). Once the fix is applied and run
against the same ASL code we get:

	[   11.486786] ACPI: Sleep(10)
	[   11.499029] ACPI: Sleep(12)
	[   11.512350] ACPI: Sleep(200)
	[   11.712282] ACPI: Sleep(200)
	[   11.912170] ACPI: Sleep(1300)
	[   13.211577] ACPI: Sleep(1300)

That is much more closer to the values we expected.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-27 21:38:15 +02:00
Lan Tianyu
eff9a4b62b ACPI / EC: Add HP Folio 13 to ec_dmi_table in order to skip DSDT scan
HP Folio 13's BIOS defines CMOS RTC Operation Region and the EC's
_REG method will access that region.  To allow the CMOS RTC region
handler to be installed before the EC _REG method is first invoked,
add ec_skip_dsdt_scan() as HP Folio 13's callback to ec_dmi_table.

References: https://bugzilla.kernel.org/show_bug.cgi?id=54621
Reported-and-tested-by: Stefan Nagy <public@stefan-nagy.at>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Cc: 3.9+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-27 21:37:18 +02:00
Lan Tianyu
2fa97feb44 ACPI: Add CMOS RTC Operation Region handler support
On HP Folio 13-2000, the BIOS defines a CMOS RTC Operation Region and
the EC's _REG methord accesses that region.  Thus an appropriate
address space handler must be registered for that region before the
EC driver is loaded.

Introduce a mechanism for adding CMOS RTC address space handlers.
Register an ACPI scan handler for CMOS RTC devices such that, when
a device of that kind is detected during an ACPI namespace scan, a
common CMOS RTC operation region address space handler will be
installed for it.

References: https://bugzilla.kernel.org/show_bug.cgi?id=54621
Reported-and-tested-by: Stefan Nagy <public@stefan-nagy.at>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Cc: 3.9+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-27 21:35:37 +02:00
Lan Tianyu
09d5ca804e ACPI / processor: Drop unused variable from processor_perflib.c
The count variable in acpi_processor_preregister_performance() is
only initalized as 1 for one CPU and incremented when another CPU
sharing the same dependency domain is found.  It isn't referenced
anywhere else, so drop it.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-25 23:05:24 +02:00
Rafael J. Wysocki
45e00374db Merge branch 'pm-fixes'
* pm-fixes:
  cpufreq: fix NULL pointer deference at od_set_powersave_bias()
2013-06-25 22:47:07 +02:00
Rafael J. Wysocki
96c9ddae03 Merge branch 'acpi-fixes'
* acpi-fixes:
  libata-acpi: add back ACPI based hotplug functionality
  ACPI / dock / PCI: Synchronous handling of dock events for PCI devices
  PCI / ACPI: Use boot-time resource allocation rules during hotplug
  ACPI / dock: Initialize ACPI dock subsystem upfront
2013-06-25 22:46:47 +02:00
Jacob Shin
c28375583b cpufreq: fix NULL pointer deference at od_set_powersave_bias()
When initializing the default powersave_bias value, we need to first
make sure that this policy is running the ondemand governor.

Reported-and-tested-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-25 22:42:37 +02:00
Aaron Lu
44521527be libata-acpi: add back ACPI based hotplug functionality
Commit 30dcf76acc "libata: migrate ACPI code over to new bindings"
mistakenly dropped the code to register hotplug notificaion handler
for ATA port/devices, causing regression for people using ATA bay,
as kernel bug #59871 shows.

Fix this by adding back the hotplug notification handler registration
code.  Since this code has to be run once and notification needs to
be installed on every ATA port/devices handle no matter if there is
actual device attached, we can't do this in binding time for ATA
device ACPI handle, as the binding only occurs when a SCSI device is
created, i.e. there is device attached.  So introduce the
ata_acpi_hotplug_init() function to loop scan all ATA ACPI handles
and if it is available, install the notificaion handler for it during
ATA init time.

With the ATA ACPI handle binding to SCSI device tree, it is possible
now that when the SCSI hotplug work removes the SCSI device, the ACPI
unbind function will find that the corresponding ACPI device has
already been deleted by dock driver, causing a scaring message like:
[  128.263966] scsi 4:0:0:0: Oops, 'acpi_handle' corrupt
Fix this by waiting for SCSI hotplug task finish in our notificaion
handler, so that the removal of ACPI device done in ACPI unbind
function triggered by the removal of SCSI device is run earlier when
ACPI device is still available.

[rjw: Rebased]
References: https://bugzilla.kernel.org/show_bug.cgi?id=59871
Reported-bisected-and-tested-by: Dirk Griesbach <spamthis@freenet.de>
Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: 3.6+ <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-25 00:51:33 +02:00
Rafael J. Wysocki
027f6d582c Merge branch 'cpufreq-fix-notification-arm' of git://git.linaro.org/people/vireshk/linux into pm-cpufreq-arm
Pull ARM cpufreq updates from Viresh Kumar.

* 'cpufreq-fix-notification-arm' of git://git.linaro.org/people/vireshk/linux:
  cpufreq: tegra: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: s3c64xx: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: omap: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: imx6q: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: exynos: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: dbx500: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases
  cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases
2013-06-24 15:08:11 +02:00
Rafael J. Wysocki
9b77df5ce6 Merge branch 'cpufreq-next' of git://git.linaro.org/people/vireshk/linux into pm-cpufreq-arm
Pull ARM cpufreq fixes from Viresh Kumar.

* 'cpufreq-next' of git://git.linaro.org/people/vireshk/linux:
  cpufreq: s3c2416: fix forgotten driver_data conversions
2013-06-24 15:07:27 +02:00
Viresh Kumar
f56cc99e3f cpufreq: tegra: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

This patch fixes it.

Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:19:01 +05:30
Viresh Kumar
6cdc9ef32c cpufreq: s3c64xx: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

This patch fixes it.

Cc: Mark Brown <broonie@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:19:01 +05:30
Viresh Kumar
44a49a23c9 cpufreq: omap: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

Omap driver was taking care of it well, but wasn't restoring freqs.new to
freqs.old in some cases. I wasn't required to add code for it as moving
PRECHANGE notifier down was a better option, so that we call it just before
starting frequency transition.

Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:19:00 +05:30
Viresh Kumar
5a571c352d cpufreq: imx6q: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

This patch fixes it.

This also moves PRECHANGE notifier down so that we call it just before starting
frequency transition.

Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:19:00 +05:30
Viresh Kumar
c3aca6b1ce cpufreq: exynos: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

This patch fixes it.

Cc: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:18:59 +05:30
Viresh Kumar
803c126af6 cpufreq: dbx500: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

This patch fixes it.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:18:59 +05:30
Viresh Kumar
f20b97d9fa cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

Davinci driver was taking care of it but frequency isn't restored to freqs.old.

This patch fixes it.

Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:18:58 +05:30
Viresh Kumar
3d69dd5051 cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we must call
POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of
calling notifiers is complete.

This patch fixes it.

This also removes code setting policy->cur as this is also done by POSTCHANGE
notifier.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2013-06-24 18:18:58 +05:30
Viresh Kumar
7f77a563f0 cpufreq: powernow-k8: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e.
either both should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we
must call POSTCHANGE notifier with freqs.new = freqs.old to guarantee
that sequence of calling notifiers is complete.

This patch fixes it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-24 13:28:57 +02:00
Viresh Kumar
f77f146599 cpufreq: pcc: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e
either both should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we
must call POSTCHANGE notifier with freqs.new = freqs.old to guarantee
that the sequence of calling notifiers is complete.

This patch fixes it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-24 13:26:39 +02:00
Viresh Kumar
567f4f6727 cpufreq: e_powersaver: call CPUFREQ_POSTCHANGE notfier in error cases
In case we have started PRECHANGE notifier and found an error, we
must call POSTCHANGE notifier with freqs.new = freqs.old.

This driver does take care of it, but the POSTCHANGE is called with
freqs.new on errors too, which is incorrect, so fix it.

[rjw: Changelog]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-24 13:19:27 +02:00
Viresh Kumar
e15d8309e9 cpufreq: ACPI: call CPUFREQ_POSTCHANGE notfier in error cases
PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both
should be called or both shouldn't be.

In case we have started PRECHANGE notifier and found an error, we
must call POSTCHANGE notifier with freqs.new = freqs.old to
guarantee that the sequence of calling notifiers is complete.

This patch fixes it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-06-24 13:14:59 +02:00