Hi Linus,
Please pull from the git repository at
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git pm+acpi-fixes-3.12-rc1
to receive ACPI and power management fixes for v3.12 with top-most commit
f1728fd1599112239ed5cebc7be9810264db6792
Merge branch 'pm-cpufreq'
on top of commit a9238741987386bb549d61572973c7e62b2a4145
Merge tag 'pci-v3.12-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaa
s/pci
All of these commits are fixes that have emerged recently and some of them
fix bugs introduced during this merge window.
Specifics:
1) ACPI-based PCI hotplug (ACPIPHP) fixes related to spurious events
After the recent ACPIPHP changes we've seen some interesting breakage
on a system that triggers device check notifications during boot for
non-existing devices. Although those notifications are really
spurious, we should be able to deal with them nevertheless and that
shouldn't introduce too much overhead. Four commits to make that
work properly.
2) Memory hotplug and hibernation mutual exclusion rework
This was maent to be a cleanup, but it happens to fix a classical
ABBA deadlock between system suspend/hibernation and ACPI memory
hotplug which is possible if they are started roughly at the same
time. Three commits rework memory hotplug so that it doesn't
acquire pm_mutex and make hibernation use device_hotplug_lock
which prevents it from racing with memory hotplug.
3) ACPI Intel LPSS (Low-Power Subsystem) driver crash fix
The ACPI LPSS driver crashes during boot on Apple Macbook Air with
Haswell that has slightly unusual BIOS configuration in which one
of the LPSS device's _CRS method doesn't return all of the information
expected by the driver. Fix from Mika Westerberg, for stable.
4) ACPICA fix related to Store->ArgX operation
AML interpreter fix for obscure breakage that causes AML to be
executed incorrectly on some machines (observed in practice). From
Bob Moore.
5) ACPI core fix for PCI ACPI device objects lookup
There still are cases in which there is more than one ACPI device
object matching a given PCI device and we don't choose the one that
the BIOS expects us to choose, so this makes the lookup take more
criteria into account in those cases.
6) Fix to prevent cpuidle from crashing in some rare cases
If the result of cpuidle_get_driver() is NULL, which can happen on
some systems, cpuidle_driver_ref() will crash trying to use that
pointer and the Daniel Fu's fix prevents that from happening.
7) cpufreq fixes related to CPU hotplug
Stephen Boyd reported a number of concurrency problems with cpufreq
related to CPU hotplug which are addressed by a series of fixes
from Srivatsa S Bhat and Viresh Kumar.
8) cpufreq fix for time conversion in time_in_state attribute
Time conversion carried out by cpufreq when user space attempts to
read /sys/devices/system/cpu/cpu*/cpufreq/stats/time_in_state won't
work correcty if cputime_t doesn't map directly to jiffies. Fix
from Andreas Schwab.
9) Revert of a troublesome cpufreq commit
Commit 7c30ed5 (cpufreq: make sure frequency transitions are
serialized) was intended to address some known concurrency problems
in cpufreq related to the ordering of transitions, but unfortunately
it introduced several problems of its own, so I decided to revert it
now and address the original problems later in a more robust way.
10) Intel Haswell CPU models for intel_pstate from Nell Hardcastle.
11) cpufreq fixes related to system suspend/resume
The recent cpufreq changes that made it preserve CPU sysfs attributes
over suspend/resume cycles introduced a possible NULL pointer
dereference that caused it to crash during the second attempt to
suspend. Three commits from Srivatsa S Bhat fix that problem and a
couple of related issues.
12) cpufreq locking fix
cpufreq_policy_restore() should acquire the lock for reading, but
it acquires it for writing. Fix from Lan Tianyu.
Thanks!
---------------
Andreas Schwab (1):
cpufreq: Fix wrong time unit conversion
Bob Moore (1):
ACPICA: Fix for a Store->ArgX when ArgX contains a reference to a field.
Daniel Fu (1):
cpuidle: Check the result of cpuidle_get_driver() against NULL
Lan Tianyu (1):
cpufreq: Acquire the lock in cpufreq_policy_restore() for reading
Mika Westerberg (1):
ACPI / LPSS: don't crash if a device has no MMIO resources
Nell Hardcastle (1):
intel_pstate: Add Haswell CPU models
Rafael J. Wysocki (9):
ACPI / scan: Change ordering of locks for device hotplug
PM / hibernate: Create memory bitmaps after freezing user space
PM / hibernate / memory hotplug: Rework mutual exclusion
ACPI / hotplug / PCI: Don't trim devices before scanning the namespace
ACPI / hotplug / PCI: Avoid doing too much for spurious notifies
ACPI / hotplug / PCI: Use _OST to notify firmware about notify status
ACPI / hotplug / PCI: Avoid parent bus rescans on spurious device checks
ACPI / bind: Prefer device objects with _STA to those without it
Revert "cpufreq: make sure frequency transitions are serialized"
Srivatsa S. Bhat (8):
cpufreq: Split __cpufreq_remove_dev() into two parts
cpufreq: Invoke __cpufreq_remove_dev_finish() after releasing cpu_hotplug.lock
cpufreq: Synchronize the cpufreq store_*() routines with CPU hotplug
cpufreq: Remove temporary fix for race between CPU hotplug and sysfs-writes
cpufreq: Use signed type for 'ret' variable, to store negative error values
cpufreq: Fix crash in cpufreq-stats during suspend/resume
cpufreq: Restructure if/else block to avoid unintended behavior
cpufreq: Prevent problems in update_policy_cpu() if last_cpu == new_cpu
Viresh Kumar (2):
cpufreq: don't allow governor limits to be changed when it is disabled
cpufreq: serialize calls to __cpufreq_governor()
---------------
drivers/acpi/acpi_lpss.c | 3 +-
drivers/acpi/acpica/exstore.c | 166 ++++++++++++++++++++++--------------
drivers/acpi/glue.c | 35 +++++---
drivers/acpi/scan.c | 15 ++--
drivers/cpufreq/cpufreq.c | 152 ++++++++++++++++++++++-----------
drivers/cpufreq/cpufreq_stats.c | 2 +-
drivers/cpufreq/intel_pstate.c | 5 ++
drivers/cpuidle/driver.c | 3 +-
drivers/pci/hotplug/acpiphp_glue.c | 61 ++++++++++---
include/linux/cpufreq.h | 1 -
kernel/power/hibernate.c | 45 +++++-----
kernel/power/user.c | 24 +++---
mm/memory_hotplug.c | 4 -
13 files changed, 328 insertions(+), 188 deletions(-)
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