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* pm-cpufreq: (30 commits)
intel_pstate: Set core to min P state during core offline
cpufreq: Add stop CPU callback to cpufreq_driver interface
cpufreq: Remove unnecessary braces
cpufreq: Fix checkpatch errors and warnings
cpufreq: powerpc: add cpufreq transition latency for FSL e500mc SoCs
cpufreq: remove unused notifier: CPUFREQ_{SUSPENDCHANGE|RESUMECHANGE}
cpufreq: Do not allow ->setpolicy drivers to provide ->target
cpufreq: arm_big_little: set 'physical_cluster' for each CPU
cpufreq: arm_big_little: make vexpress driver depend on bL core driver
cpufreq: SPEAr: Instantiate as platform_driver
cpufreq: Remove unnecessary variable/parameter 'frozen'
cpufreq: Remove cpufreq_generic_exit()
cpufreq: add 'freq_table' in struct cpufreq_policy
cpufreq: Reformat printk() statements
cpufreq: Tegra: Use cpufreq_generic_suspend()
cpufreq: s5pv210: Use cpufreq_generic_suspend()
cpufreq: exynos: Use cpufreq_generic_suspend()
cpufreq: Implement cpufreq_generic_suspend()
cpufreq: suspend governors on system suspend/hibernate
cpufreq: move call to __find_governor() to cpufreq_init_policy()
...
* pm-cpuidle:
cpuidle: delay enabling interrupts until all coupled CPUs leave idle
cpuidle: poll state can measure residency
cpuidle: Move perf multiplier calculation out of the selection loop
cpuidle: Do not substract exit latency from assumed sleep length
cpuidle: Ensure menu coefficients stay within domain
cpuidle: Use actual state latency in menu governor
cpuidle: rename expected_us to next_timer_us in menu governor
rjw> Why exactly are they errors?
Geert> checkpatch.pl says: "WARNING: please, no space before tabs",
Vim (with "let c_space_errors=1") shows them in red.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Change to use the new ->stop_cpu() callback to do clean up during CPU
hotplug. The requested P state for an offline core will be used by the
hardware coordination function to select the package P state. If the
core is under load when it is offlined it will fix the package P state
floor to the requested P state of offline core.
Reported-by: Patrick Marlier <patrick.marlier@gmail.com>
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This callback allows the driver to do clean up before the CPU is
completely down and its state cannot be modified. This is used
by the intel_pstate driver to reduce the requested P state prior to
the core going away. This is required because the requested P state
of the offline core is used to select the package P state. This
effectively sets the floor package P state to the requested P state on
the offline core.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
[rjw: Minor modifications]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Remove unnecessary braces from a single statement.
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Fix 2 checkpatch errors about using assignment in if condition,
1 checkpatch error about a required space after comma
and 3 warnings about line over 80 characters.
Signed-off-by: Stratos Karafotis <stratosk@semaphore.gr>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
According to the data provided by HW Team, at least 12 internal platform
clock cycles are required to stabilize a DFS clock switch on FSL e500mc Socs.
This patch replaces the CPUFREQ_ETERNAL with appropriate HW clock transition
latency to make DFS governors work normally on Freescale e500mc boards.
Signed-off-by: Zhuoyu Zhang <Zhuoyu.Zhang@freescale.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
For a few subsystems I am the person who actually applies patches
and people don't CC me on patch submissions, because my address is
not the first one in the given MAINTAINERS item.
Reorder PM and ACPI maintainer addresses in MAINTAINERS to make
the probability of that a bit smaller.
Signed-off-by: Rafael J. Wysocki <rjw@rjwysocki.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
As of commit 45f0a85c8258 ('PM / Runtime: Rework the "runtime idle"
helper routine'), the return value of ->runtime_idle() is no longer
ignored by the PM core, but used to decide whether to suspend the
device or not.
Update the documentation to match the code.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
It was only ever used by the ACPI video driver, and that only use case
vanished over 3 years ago (see commit 677bd810, "ACPI video: remove
output switching control".) So this is dead code and I guess we can
remove it now.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The fujitsu-laptop driver includes <linux/video_output.h> but doesn't
call any of its functions. Drop the unneeded include to avoid
unnecessary driver rebuilds.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPI_VIDEO no longer depends on VIDEO_OUTPUT_CONTROL, so drivers which
want to select ACPI_VIDEO no longer have to select
VIDEO_OUTPUT_CONTROL.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: "Lee, Chun-Yi" <jlee@suse.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPI_VIDEO no longer depends on VIDEO_OUTPUT_CONTROL, so drivers which
want to select ACPI_VIDEO no longer have to select
VIDEO_OUTPUT_CONTROL.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPI_VIDEO stopped depending on VIDEO_OUTPUT_CONTROL over 3 years ago
(see commit 677bd810, "ACPI video: remove output switching control".)
So it's about time to remove the Kconfig dependency between these two
options.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Two cpufreq notifiers CPUFREQ_RESUMECHANGE and CPUFREQ_SUSPENDCHANGE have
not been used for some time, so remove them to clean up code a bit.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
[rjw: Changelog]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
cpufreq drivers that provide the ->setpolicy() callback are supposed
to have integrated governors, so they don't need to set ->target()
or ->target_index() and may confuse the core if any of these callbacks
is present.
For this reason, add a check preventing ->setpolicy cpufreq drivers
from registering if they have non-NULL ->target or ->target_index.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
We have a per-CPU variable for managing which cluster a CPU belongs to.
Currently, physical_cluster is set for policy->cpu only which leads to
the following on some SoC's:
- There are two clusters:
- Cluster 0 has four ARM Cortex A7 CPUs (slower ones): 0,1,2,3
- Cluster 1 has four ARM Cortex A15 CPUs (faster ones): 4,5,6,7
- CPUs are booted in order 0,1..7 and so initially policy->cpu for A7 cluster
would be 0 and for A15 cluster would be 4.
- Now CPU4 (i.e. A15_0) is hotplugged out and so policy->cpu for A15 cluster
becomes 5 (i.e. A15_1).
- But physical cluster is only set for CPU0 and CPU4 in ARM big LITTLE driver
and isn't updated.
- Now freq change request comes for A15 cluster and we would try to update freq
of physical_cluster of CPU5, i.e. A15_1. And it is currently set to zero
(default value of uninitialized global variables).
- And so we actually try to change freq of A7 cluster instead of A15.
- This also results in kernel crash as sometimes we might request freq above
A7's limit and CPU may behave badly..
Fix this by initializing physical_cluster for all CPUs of a policy.
Based on previous work by Xin Wang.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Currently vexpress big LITTLE driver selects ARM_BIG_LITTLE_CPUFREQ, so
if CONFIG_BIG_LITTLE isn't enabled and CONFIG_ARM_VEXPRESS_SPC_CPUFREQ
is enabled, we get the following build warnings:
warning: (ARM_VEXPRESS_SPC_CPUFREQ) selects ARM_BIG_LITTLE_CPUFREQ which has
unmet direct dependencies (ARCH_HAS_CPUFREQ && CPU_FREQ && (ARM || ARM64) && ARM
&& BIG_LITTLE && ARM_CPU_TOPOLOGY && HAVE_CLK)
To fix this, make ARM_VEXPRESS_SPC_CPUFREQ depend on ARM_BIG_LITTLE_CPUFREQ
instead of selecting it.
This also moves the entry for ARM_VEXPRESS_SPC_CPUFREQ along with other
big LITTLE config entries.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Commit 1696d9d (ACPI: Remove the old /proc/acpi/event interface)
removed ACPI Button event which originally was sent to userspace via
/proc/acpi/event. This caused ACPI shutdown regression on gentoo
in VirtualBox. Now ACPI events are sent to userspace via netlink,
so add ACPI Button event back via netlink routine.
References: https://bugzilla.kernel.org/show_bug.cgi?id=71721
Reported-and-tested-by: Richard Musil <richard.musil@gmail.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Cc: 3.11+ <stable@vger.kernel.org> # 3.11+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
We already have a macro for PREFIX of "ACPI: " in
drivers/acpi/internal.h, so remove the duplicate ones
in ACPI drivers when internal.h is included.
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
On HP Pavilion dv6-6179er there are no notifications when AC adapter
is plugged/unplugged.
However, when AC status is read (acpi_ac_get_state), and if AC status
has changed, AML code triggers the notification.
This patch solves the problem by re-reading AC adapter status upon
ACPI_BATTERY_NOTIFY_STATUS notification.
Signed-off-by: Alexander Mezin <mezin.alexander@gmail.com>
Acked-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Allow other drivers to subscribe to battery status notifications.
Just like AC driver does.
Signed-off-by: Alexander Mezin <mezin.alexander@gmail.com>
Acked-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
ACPI_BATTERY_CLASS is used in multiple places.
Also, I'll use ACPI_BATTERY_NOTIFY_STATUS inside AC driver in
one of following patches.
So, create a header file and move ACPI_BATTERY_CLASS and
ACPI_BATTERY_NOTIFY_* definitions into it.
Also, remove copy of ACPI_BATTERY_CLASS from sbs.c
Signed-off-by: Alexander Mezin <mezin.alexander@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This reverts commit aae576e5faefa8ba70647efa320d4747b6375f1e.
Push and Pop are not portable "enough", and caused problems for
some ACPICA customers.
Signed-off-by: Robert 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>
Version 20140214.
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>
This change hardens the ACPICA code to detect circular linked object
lists and prevent an infinite loop if such corruption exists.
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>
This change adds support for two missing objects, the "extra" and
"data" secondary objects, as well as adding support to traverse and
display linked lists related to ACPICA objects.
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>
Adds further information about why new _OSI strings should be
adopted by all hosts as soon as possible.
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>
Allow objects of type "reference" in the second subpackage element.
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>
This change cleans up the entire global variable mechaninism including
the related macros. Also reduces warnings from the "sparse" utility
in the Linux environment. Lv Zheng.
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Change all instances of "sub-package" to "subpackage" for consistency.
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>
* acpi-ost:
ACPI: Drop acpi_evaluate_hotplug_ost() and ACPI_HOTPLUG_OST
ACPI: use device name LNXSYBUS.xx for ACPI \_SB and \_TZ objects
ACPI / processor: use acpi_evaluate_ost() to replace open-coded version
ACPI / PAD / xen: use acpi_evaluate_ost() to replace open-coded version
ACPI / PAD: use acpi_evaluate_ost() to replace open-coded version
ACPI: rename acpi_evaluate_hotplug_ost() to acpi_evaluate_ost()
* acpi-hotplug:
ACPI / hotplug: Rework deferred execution of acpi_device_hotplug()
ACPI / dock: Update copyright notice
ACPI / dock: Drop remove_dock_dependent_devices()
ACPI / dock: Drop struct acpi_dock_ops and all code related to it
ACPI / ATA: Add hotplug contexts to ACPI companions of SATA devices
ACPI / dock: Add .uevent() callback to struct acpi_hotplug_context
ACPI / dock: Use callback pointers from devices' ACPI hotplug contexts
ACPI / dock: Use ACPI device object pointers instead of ACPI handles
ACPI / hotplug: Add .fixup() callback to struct acpi_hotplug_context
ACPI / hotplug / PCI: Do not clear event callback pointer for docks
ACPI / dock: Associate dock platform devices with ACPI device objects
ACPI / dock: Pass ACPI device pointer to acpi_device_is_battery()
ACPI / dock: Dispatch dock notifications from the global notify handler
Pull scheduler fixes from Ingo Molnar:
"Three small fixes"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/clock: Prevent tracing recursion in sched_clock_cpu()
stop_machine: Fix^2 race between stop_two_cpus() and stop_cpus()
sched/deadline: Deny unprivileged users to set/change SCHED_DEADLINE policy
Pull perf fixes from Ingo Molnar:
"Misc smaller fixes"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86: Fix leak in uncore_type_init failure paths
perf machine: Use map as success in ip__resolve_ams
perf symbols: Fix crash in elf_section_by_name
perf trace: Decode architecture-specific signal numbers
While testing and documenting the msgrcv() MSG_COPY flag that Stanislav
Kinsbursky added in commit 4a674f34ba04 ("ipc: introduce message queue
copy feature" => kernel 3.8), I discovered a couple of bugs in the
implementation. The two bugs concern MSG_COPY interactions with other
msgrcv() flags, namely:
(A) MSG_COPY + MSG_EXCEPT
(B) MSG_COPY + !IPC_NOWAIT
The bugs are distinct (and the fix for the first one is obvious),
however my fix for both is a single-line patch, which is why I'm
combining them in a single mail, rather than writing two mails+patches.
===== (A) MSG_COPY + MSG_EXCEPT =====
With the addition of the MSG_COPY flag, there are now two msgrcv()
flags--MSG_COPY and MSG_EXCEPT--that modify the meaning of the 'msgtyp'
argument in unrelated ways. Specifying both in the same call is a
logical error that is currently permitted, with the effect that MSG_COPY
has priority and MSG_EXCEPT is ignored. The call should give an error
if both flags are specified. The patch below implements that behavior.
===== (B) (B) MSG_COPY + !IPC_NOWAIT =====
The test code that was submitted in commit 3a665531a3b7 ("selftests: IPC
message queue copy feature test") shows MSG_COPY being used in
conjunction with IPC_NOWAIT. In other words, if there is no message at
the position 'msgtyp'. return immediately with the error in ENOMSG.
What was not (fully) tested is the behavior if MSG_COPY is specified
*without* IPC_NOWAIT, and there is an odd behavior. If the queue
contains less than 'msgtyp' messages, then the call blocks until the
next message is written to the queue. At that point, the msgrcv() call
returns a copy of the newly added message, regardless of whether that
message is at the ordinal position 'msgtyp'. This is clearly bogus, and
problematic for applications that might want to make use of the MSG_COPY
flag.
I considered the following possible solutions to this problem:
(1) Force the call to block until a message *does* appear at the
position 'msgtyp'.
(2) If the MSG_COPY flag is specified, the kernel should implicitly add
IPC_NOWAIT, so that the call fails with ENOMSG for this case.
(3) If the MSG_COPY flag is specified, but IPC_NOWAIT is not, generate
an error (probably, EINVAL is the right one).
I do not know if any application would really want to have the
functionality of solution (1), especially since an application can
determine in advance the number of messages in the queue using msgctl()
IPC_STAT. Obviously, this solution would be the most work to implement.
Solution (2) would have the effect of silently fixing any applications
that tried to employ broken behavior. However, it would mean that if we
later decided to implement solution (1), then user-space could not
easily detect what the kernel supports (but, since I'm somewhat doubtful
that solution (1) is needed, I'm not sure that this is much of a
problem).
Solution (3) would have the effect of informing broken applications that
they are doing something broken. The downside is that this would cause
a ABI breakage for any applications that are currently employing the
broken behavior. However:
a) Those applications are almost certainly not getting the results they
expect.
b) Possibly, those applications don't even exist, because MSG_COPY is
currently hidden behind CONFIG_CHECKPOINT_RESTORE.
The upside of solution (3) is that if we later decided to implement
solution (1), user-space could determine what the kernel supports, via
the error return.
In my view, solution (3) is mildly preferable to solution (2), and
solution (1) could still be done later if anyone really cares. The
patch below implements solution (3).
PS. For anyone out there still listening, it's the usual story:
documenting an API (and the thinking about, and the testing of the API,
that documentation entails) is the one of the single best ways of
finding bugs in the API, as I've learned from a lot of experience. Best
to do that documentation before releasing the API.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: Stanislav Kinsbursky <skinsbursky@parallels.com>
Cc: stable@vger.kernel.org
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This is a set of six fixes. Two are instant crash/null deref types (storvsc
and isci). The two qla2xxx are initialisation problems that cause MSI-X
failures and card misdetection, the isci erroneous macro is actually illegal C
that's causing a miscompile with certain gcc versions and the be2iscsi bad if
expression is a static checker fix.
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
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Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is a set of six fixes. Two are instant crash/null deref types
(storvsc and isci). The two qla2xxx are initialisation problems that
cause MSI-X failures and card misdetection, the isci erroneous macro
is actually illegal C that's causing a miscompile with certain gcc
versions and the be2iscsi bad if expression is a static checker fix"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
[SCSI] storvsc: NULL pointer dereference fix
[SCSI] qla2xxx: Poll during initialization for ISP25xx and ISP83xx
[SCSI] isci: correct erroneous for_each_isci_host macro
[SCSI] isci: fix reset timeout handling
[SCSI] be2iscsi: fix bad if expression
[SCSI] qla2xxx: Fix multiqueue MSI-X registration.
