linux/drivers
Chen Yu c4a3fa261b cpufreq: Bring CPUs up even if cpufreq_online() failed
There is a report that after commit 27622b061e ("cpufreq: Convert
to hotplug state machine"), the normal CPU offline/online cycle
fails on some platforms.

According to the ftrace result, this problem was triggered on
platforms using acpi-cpufreq as the default cpufreq driver,
and due to the lack of some ACPI freq method (eg. _PCT),
cpufreq_online() failed and returned a negative value, so the CPU
hotplug state machine rolled back the CPU online process.  Actually,
from the user's perspective, the failure of cpufreq_online() should
not prevent that CPU from being brought up, although cpufreq might
not work on that CPU.

BTW, during system startup cpufreq_online() is not invoked via CPU
online but by the cpufreq device creation process, so the APs can be
brought up even though cpufreq_online() fails in that stage.

This patch ignores the return value of cpufreq_online/offline() and
lets the cpufreq framework deal with the failure.  cpufreq_online()
itself will do a proper rollback in that case and if _PCT is missing,
the ACPI cpufreq driver will print a warning if the corresponding
debug options have been enabled.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=194581
Fixes: 27622b061e ("cpufreq: Convert to hotplug state machine")
Reported-and-tested-by: Tomasz Maciej Nowak <tmn505@gmail.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: 4.9+ <stable@vger.kernel.org> # 4.9+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-04-13 03:38:44 +02:00
..
accessibility
acpi Merge branch 'acpi-scan-fixes' 2017-04-07 13:48:26 +02:00
amba
android sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
ata ahci: qoriq: correct the sata ecc setting error 2017-03-09 11:55:23 -05:00
atm sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
auxdisplay auxdisplay: img-ascii-lcd: add missing sentinel entry in img_ascii_lcd_matches 2017-03-16 16:59:55 +09:00
base drivers core: remove assert_held_device_hotplug() 2017-03-16 16:56:19 -07:00
bcma
block nbd: replace kill_bdev() with __invalidate_device() 2017-03-24 15:42:47 -06:00
bluetooth Bluetooth: btqcomsmd: fix compile-test dependency 2017-03-22 19:22:04 -07:00
bus ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
cdrom Merge branch 'for-4.11/next' into for-4.11/linus-merge 2017-02-17 14:08:19 -07:00
char Char/Misc driver fixes for 4.11-rc4 2017-03-26 11:15:54 -07:00
clk Allwinner clock fixes for 4.11 2017-03-23 16:08:46 -07:00
clocksource Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-04-02 09:22:03 -07:00
connector
cpufreq cpufreq: Bring CPUs up even if cpufreq_online() failed 2017-04-13 03:38:44 +02:00
cpuidle cpuidle: powernv: Pass correct drv->cpumask for registration 2017-03-29 22:55:36 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2017-03-31 12:11:32 -07:00
dax device-dax: fix debug output typo 2017-03-10 19:56:56 -08:00
dca
devfreq scripts/spelling.txt: add "followings" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
dio
dma dmaengine: Fix array index out of bounds warning in __get_unmap_pool() 2017-03-14 10:11:27 +05:30
dma-buf sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
edac EDAC, pnd2_edac: Fix reported DIMM number 2017-03-26 09:36:28 +02:00
eisa
extcon extcon: int3496: Set the id pin to direction-input if necessary 2017-03-22 18:29:48 +09:00
firewire Merge branch 'idr-4.11' of git://git.infradead.org/users/willy/linux-dax 2017-02-28 20:29:41 -08:00
firmware efi/esrt: Cleanup bad memory map log messages 2017-03-17 18:53:12 +00:00
fmc
fpga fpga zynq: Use the scatterlist interface 2017-02-10 15:20:44 +01:00
fsi drivers/fsi: add driver to device matches 2017-02-10 15:19:48 +01:00
gpio ACPI / gpio: do not fall back to parsing _CRS when we get a deferral 2017-03-30 11:08:46 +02:00
gpu Merge branch 'msm-fixes-4.11-rc6' of git://people.freedesktop.org/~robclark/linux into drm-fixes 2017-04-04 10:13:40 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2017-03-31 11:50:31 -07:00
hsi sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
hv Drivers: hv: vmbus: Don't leak memory when a channel is rescinded 2017-03-16 16:42:33 +09:00
hwmon hwmon: (asus_atk0110) fix uninitialized data access 2017-03-23 12:01:57 -07:00
hwspinlock
hwtracing intel_th: pci: Add Gemini Lake support 2017-03-15 14:55:18 +02:00
i2c i2c: mux: pca954x: Add missing pca9546 definition to chip_desc 2017-03-24 12:22:18 +01:00
ide sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h> 2017-03-02 08:42:36 +01:00
idle Power management turbostat utility updates for v4.11-rc1 2017-03-02 17:41:27 -08:00
iio iio: hid-sensor-attributes: Fix sensor property setting failure. 2017-04-02 11:44:03 +01:00
infiniband IB/qib: fix false-postive maybe-uninitialized warning 2017-03-24 22:44:29 -04:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2017-03-23 19:51:06 -07:00
iommu Merge branch 'for-joerg/arm-smmu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into iommu/fixes 2017-03-22 23:59:56 +01:00
ipack
irqchip irqchip fixes for 4.11-rc5 2017-03-31 16:54:48 +02:00
isdn isdn: kcapi: avoid uninitialized data 2017-03-28 17:59:33 -07:00
leds sched/headers: Prepare for new header dependencies before moving code to <linux/sched/loadavg.h> 2017-03-02 08:42:27 +01:00
lguest sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
lightnvm lightnvm: set default lun range when no luns are specified 2017-02-15 08:27:21 -07:00
macintosh powerpc/pmac: Fix crash in dma-mapping.h with NULL dma_ops 2017-03-10 14:17:23 +11:00
mailbox sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
mcb
md Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2017-04-08 11:56:58 -07:00
media media fixes for v4.11-rc4 2017-03-24 13:34:16 -07:00
memory Linux 4.11-rc1 2017-03-06 08:37:53 -08:00
memstick Merge branch 'for-4.11/next' into for-4.11/linus-merge 2017-02-17 14:08:19 -07:00
message SCSI misc on 20170220 2017-02-21 11:51:42 -08:00
mfd staging/iio driver patches for 4.11-rc1 2017-02-22 12:14:01 -08:00
misc Char/Misc driver fixes for 4.11-rc4 2017-03-26 11:15:54 -07:00
mmc mmc: sdhci-of-at91: fix MMC_DDR_52 timing selection 2017-03-30 21:10:29 +02:00
mtd scripts/spelling.txt: add "disble(d)" pattern and fix typo instances 2017-03-09 17:01:09 -08:00
net nfp: fix potential use after free on xdp prog 2017-04-05 18:46:40 -07:00
nfc scripts/spelling.txt: add "omited" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
ntb ntb: ntb_hw_intel: link_poll isn't clearing the pending status properly 2017-02-16 23:11:26 -05:00
nubus
nvdimm nfit, libnvdimm: fix interleave set cookie calculation 2017-03-01 00:49:42 -08:00
nvme nvmet: fix byte swap in nvmet_parse_io_cmd 2017-04-02 10:24:15 +03:00
nvmem
of DeviceTree updates for 4.11: 2017-02-22 19:23:14 -08:00
oprofile sched/headers: Prepare to move the get_task_struct()/put_task_struct() and related APIs from <linux/sched.h> to <linux/sched/task.h> 2017-03-02 08:42:40 +01:00
parisc Merge branch 'parisc-4.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux 2017-03-03 16:20:06 -08:00
parport parport: fix attempt to write duplicate procfiles 2017-03-16 17:32:21 +09:00
pci PCI: dwc: Fix dw_pcie_ops NULL pointer dereference 2017-04-04 08:24:25 -05:00
pcmcia
perf sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h> 2017-03-02 08:42:27 +01:00
phy phy: qcom-usb-hs: Add depends on EXTCON 2017-03-09 15:29:57 +05:30
pinctrl pinctrl: core: Fix pinctrl_register_and_init() with pinctrl_enable() 2017-04-07 01:08:08 +02:00
platform platform-drivers-x86 for v4.11-2 2017-03-13 13:23:43 -07:00
pnp
power scripts/spelling.txt: add "intialization" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
powercap
pps
ps3 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
ptp PTP: fix ptr_ret.cocci warnings 2017-03-20 16:25:06 +01:00
pwm pwm: Changes for v4.11-rc1 2017-03-01 09:46:02 -08:00
rapidio drivers/rapidio/devices/tsi721.c: make module parameter variable name unique 2017-03-31 17:13:30 -07:00
ras
regulator regulator: Updates for v4.11 2017-02-20 17:23:57 -08:00
remoteproc remoteproc: qcom: fix QCOM_SMD dependencies 2017-03-20 14:45:44 -07:00
reset ARM: SoC driver updates 2017-02-23 15:57:04 -08:00
rpmsg virtio, vhost: optimizations, fixes 2017-03-02 13:53:13 -08:00
rtc sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-04-05 20:17:38 -07:00
sbus
scsi Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2017-04-08 11:56:58 -07:00
sfi
sh
sn
soc sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
spi sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h> 2017-03-02 08:42:27 +01:00
spmi
ssb
staging staging: android: ashmem: lseek failed due to no FMODE_LSEEK. 2017-04-08 12:13:11 +02:00
target tcmu: Convert cmd_time_out into backend device attribute 2017-03-18 16:32:30 -07:00
tc
thermal thermal: cpu_cooling: Check OPP for errors 2017-03-13 10:06:55 +08:00
thunderbolt
tty Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-04-02 09:25:10 -07:00
uio sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
usb usb: phy: isp1301: Fix build warning when CONFIG_OF is disabled 2017-03-29 12:13:50 +02:00
uwb uwb: i1480-dfu: fix NULL-deref at probe 2017-03-14 17:07:31 +08:00
vfio VFIO fixes for v4.11-rc4 2017-03-24 14:39:36 -07:00
vhost vhost-vsock: add pkt cancel capability 2017-03-21 14:41:46 -07:00
video sched/headers: Remove the <linux/mm_types.h> dependency from <linux/sched.h> 2017-03-03 01:45:16 +01:00
virt
virtio virtio_balloon: prevent uninitialized variable use 2017-03-28 20:41:28 +03:00
vlynq
vme
w1 sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h> 2017-03-02 08:42:29 +01:00
watchdog watchdog: retu: restore MFD dependency 2017-03-01 06:15:10 -08:00
xen xenbus: remove transaction holder from list before freeing 2017-04-04 10:11:06 -04:00
zorro
Kconfig drivers/fsi: Add empty fsi bus definitions 2017-02-10 15:19:48 +01:00
Makefile pci-v4.11-changes 2017-02-23 11:53:22 -08:00