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7ca380f606
linux/drivers/acpi
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Bartlomiej Zolnierkiewicz 7ca380f606 ACPI / cpuidle: fix max idle state handling with hotplug CPU support 
acpi_processor_hotplug() calls acpi_processor_setup_cpuidle_cx()
without calling acpi_processor_setup_cpuidle_states() first so it
is possible that dev->state_count becomes different from
drv->state_count (in case of SMP system with unsupported C2/C3
states + enabled CPU hotplug and num_online_cpus() becoming > 1).

The driver code assumes that cpuidle core will handle such cases
but currently this is untrue (dev->state_count is used only for
handling cpuidle state sysfs entries and drv->state_count is used
for all other cases) and will not be fixed in the future as
dev->state_count is planned to be removed.

Fix the issue by checking for the max supported idle state in
C2/C3 state's ->enter handler (acpi_idle_enter_simple() for C2/C3
and acpi_idle_enter_bm() for C3 + bm_check flag set) and setting
the C1 state (instead of higher states) when needed.

Also remove no longer needed max idle state checks from
acpi_processor_setup_cpuidle_[states,cx]().

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-01-11 01:26:49 +01:00
..
acpica Merge branch 'acpica' 2013-11-27 01:03:27 +01:00
apei Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-12-29 13:35:04 -08:00
ac.c ACPI / AC: Remove struct acpi_device pointer from struct acpi_ac 2013-11-14 23:23:14 +01:00
acpi_cmos_rtc.c ACPI: Add CMOS RTC Operation Region handler support 2013-06-27 21:35:37 +02:00
acpi_extlog.c ACPI, x86: Extended error log driver for x86 platform 2013-10-23 10:09:07 -07:00
acpi_ipmi.c ACPI / IPMI: Cleanup coding styles 2013-09-30 19:46:13 +02:00
acpi_lpss.c ACPI: Add BayTrail SoC GPIO and LPSS ACPI IDs 2013-11-30 15:07:36 +01:00
acpi_memhotplug.c Merge branch 'acpi-hotplug' 2013-10-28 01:12:41 +01:00
acpi_pad.c PTR_RET() is a weird name, and led to some confusing usage. We ended 2013-09-04 17:31:11 -07:00
acpi_platform.c ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node 2013-11-14 23:14:43 +01:00
acpi_processor.c Merge branch 'acpi-processor' 2013-10-28 01:11:24 +01:00
battery.c ACPI / Battery: Remove battery's proc directory 2013-10-12 00:19:44 +02:00
bgrt.c acpi: bgrt: fix build error due to attribute change 2013-08-22 08:34:39 -07:00
blacklist.c Merge branch 'acpi-config' 2013-11-16 15:45:00 +01:00
bus.c ACPIPHP / radeon / nouveau: Fix VGA switcheroo problem related to hotplug 2013-12-31 13:39:42 +01:00
button.c ACPI / button: Using input_set_capability() to mark device's event capability 2013-09-25 17:11:57 +02:00
container.c Merge branch 'acpi-assorted' 2013-04-28 01:54:08 +02:00
custom_method.c The sweeping change is to make add_taint() explicitly indicate whether to disable 2013-02-25 15:41:43 -08:00
debugfs.c acpi: add export.h to files using THIS_MODULE/EXPORT_SYMBOL 2011-10-31 19:30:34 -04:00
device_pm.c ACPI: Eliminate the DEVICE_ACPI_HANDLE() macro 2013-11-14 23:17:21 +01:00
dock.c Merge branch 'acpi-hotplug' 2013-11-07 19:31:15 +01:00
ec_sys.c ACPI / EC: access user space with get_user()/put_user() 2013-06-19 23:29:20 +02:00
ec.c Merge branch 'acpi-ec' 2013-11-19 01:06:06 +01:00
event.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-11-19 15:50:47 -08:00
fan.c ACP / fan: trivial style cleanup 2013-09-24 01:40:38 +02:00
glue.c ACPI / bind: Use (put|get)_device() on ACPI device objects too 2013-11-14 23:18:32 +01:00
hed.c ACPI: Remove useless type argument of driver .remove() operation 2013-01-26 00:37:24 +01:00
internal.h Merge branch 'acpi-hotplug' 2013-11-07 19:31:15 +01:00
Kconfig x86/efi: Don't select EFI from certain special ACPI drivers 2013-12-19 21:32:46 +01:00
Makefile ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
numa.c ACPI / mm: use NUMA_NO_NODE 2013-09-24 01:40:38 +02:00
nvs.c ACPI: Clean up incorrect inclusions of ACPICA headers 2013-11-26 00:27:10 +01:00
osl.c Merge branch 'acpi-hotplug' 2013-11-07 19:31:15 +01:00
pci_irq.c PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers 2013-02-16 11:58:34 -07:00
pci_link.c ACPI: Set length even for TYPE_END_TAG acpi resource 2013-03-24 01:00:38 +01:00
pci_root.c Merge branches 'acpi-hotplug', 'acpi-sysfs' and 'acpi-sleep' 2013-11-25 22:30:30 +01:00
pci_slot.c ACPI / PCI: Make bus registration and unregistration symmetric 2013-07-23 03:58:42 +02:00
power.c ACPI / power: Drop automaitc resume of power resource dependent devices 2013-10-16 23:05:42 +02:00
proc.c ACPI / proc: Remove alarm proc file 2013-10-12 00:19:45 +02:00
processor_core.c ACPI / processor: Introduce apic_id in struct processor to save parsed APIC id 2013-09-24 01:39:39 +02:00
processor_driver.c ACPI / processor: Do not request ACPI cpufreq module directly 2013-10-30 00:00:30 +01:00
processor_idle.c ACPI / cpuidle: fix max idle state handling with hotplug CPU support 2014-01-11 01:26:49 +01:00
processor_perflib.c ACPI / processor: Do not request ACPI cpufreq module directly 2013-10-30 00:00:30 +01:00
processor_thermal.c ACPI / processor: Remove acpi_processor_get_limit_info() 2013-08-13 12:11:22 +02:00
processor_throttling.c ACPI: suppress compiler warnings in processor_throttling.c 2013-03-25 00:05:48 +01:00
reboot.c Revert "ACPI: ignore FADT reset-reg-sup flag" 2012-04-20 11:19:35 -07:00
resource.c ACPI: introduce helper function acpi_has_method() 2013-07-15 01:33:10 +02:00
sbs.c ACPI / SBS: Remove SBS's proc directory 2013-10-12 00:19:44 +02:00
sbshc.c ACPI: Remove useless type argument of driver .remove() operation 2013-01-26 00:37:24 +01:00
sbshc.h
scan.c Merge branches 'acpi-hotplug', 'acpi-sysfs' and 'acpi-sleep' 2013-11-25 22:30:30 +01:00
sleep.c ACPI / sleep: clean up compiler warning about uninitialized field 2013-11-21 01:44:43 +01:00
sleep.h ACPI: Drop power resources driver 2013-01-17 14:11:06 +01:00
sysfs.c ACPI / sysfs: Fix incorrect ACPI tables walk in acpi_tables_sysfs_init() 2013-11-21 14:19:33 +01:00
tables.c ACPICA: Cleanup table handler naming conflicts. 2013-01-11 13:10:16 +01:00
thermal.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2013-11-14 14:42:31 +09:00
utils.c ACPI: Fix spelling mistake in error messages 2013-10-30 00:02:42 +01:00
video_detect.c ACPI / video: Add Lenovo IdeaPad Yoga 13 to acpi video detect blacklist 2013-10-16 01:27:33 +02:00
video.c ACPI / video: clean up DMI table for initial black screen problem 2013-11-15 23:23:17 +01:00
wakeup.c ACPI / Wakeup: Enable button GPEs unconditionally during initialization 2011-02-12 01:39:53 +01:00