Yi Zeng ea40afb5c3 thermal: power_allocator: fix one race condition issue for thermal_instances list ... [ Upstream commit a5de11d67d ] When invoking allow_maximum_power and traverse tz->thermal_instances, we should grab thermal_zone_device->lock to avoid race condition. For example, during the system reboot, if the mali GPU device implements device shutdown callback and unregister GPU devfreq cooling device, the deleted list head may be accessed to cause panic, as the following log shows: [ 33.551070] c3 25 (kworker/3:0) Unable to handle kernel paging request at virtual address dead000000000070 [ 33.566708] c3 25 (kworker/3:0) pgd = ffffffc0ed290000 [ 33.572071] c3 25 (kworker/3:0) [dead000000000070] *pgd=00000001ed292003, *pud=00000001ed292003, *pmd=0000000000000000 [ 33.581515] c3 25 (kworker/3:0) Internal error: Oops: 96000004 [#1] PREEMPT SMP [ 33.599761] c3 25 (kworker/3:0) CPU: 3 PID: 25 Comm: kworker/3:0 Not tainted 4.4.35+ #912 [ 33.614137] c3 25 (kworker/3:0) Workqueue: events_freezable thermal_zone_device_check [ 33.620245] c3 25 (kworker/3:0) task: ffffffc0f32e4200 ti: ffffffc0f32f0000 task.ti: ffffffc0f32f0000 [ 33.629466] c3 25 (kworker/3:0) PC is at power_allocator_throttle+0x7c8/0x8a4 [ 33.636609] c3 25 (kworker/3:0) LR is at power_allocator_throttle+0x808/0x8a4 [ 33.643742] c3 25 (kworker/3:0) pc : [<ffffff8008683dd0>] lr : [<ffffff8008683e10>] pstate: 20000145 [ 33.652874] c3 25 (kworker/3:0) sp : ffffffc0f32f3bb0 [ 34.468519] c3 25 (kworker/3:0) Process kworker/3:0 (pid: 25, stack limit = 0xffffffc0f32f0020) [ 34.477220] c3 25 (kworker/3:0) Stack: (0xffffffc0f32f3bb0 to 0xffffffc0f32f4000) [ 34.819822] c3 25 (kworker/3:0) Call trace: [ 34.824021] c3 25 (kworker/3:0) Exception stack(0xffffffc0f32f39c0 to 0xffffffc0f32f3af0) [ 34.924993] c3 25 (kworker/3:0) [<ffffff8008683dd0>] power_allocator_throttle+0x7c8/0x8a4 [ 34.933184] c3 25 (kworker/3:0) [<ffffff80086807f4>] handle_thermal_trip.part.25+0x70/0x224 [ 34.941545] c3 25 (kworker/3:0) [<ffffff8008680a68>] thermal_zone_device_update+0xc0/0x20c [ 34.949818] c3 25 (kworker/3:0) [<ffffff8008680bd4>] thermal_zone_device_check+0x20/0x2c [ 34.957924] c3 25 (kworker/3:0) [<ffffff80080b93a4>] process_one_work+0x168/0x458 [ 34.965414] c3 25 (kworker/3:0) [<ffffff80080ba068>] worker_thread+0x13c/0x4b4 [ 34.972650] c3 25 (kworker/3:0) [<ffffff80080c0a4c>] kthread+0xe8/0xfc [ 34.979187] c3 25 (kworker/3:0) [<ffffff8008084e90>] ret_from_fork+0x10/0x40 [ 34.986244] c3 25 (kworker/3:0) Code: f9405e73 eb1302bf d102e273 54ffc460 (b9402a61) [ 34.994339] c3 25 (kworker/3:0) ---[ end trace 32057901e3b7e1db ]--- Signed-off-by: Yi Zeng <yizeng@asrmicro.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-04-12 12:32:12 +02:00
..
broadcom	thermal: bcm2835: constify thermal_zone_of_device_ops structures	2017-08-11 11:38:30 +08:00
int340x_thermal	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
qcom
samsung	thermal: exynos: constify thermal_zone_of_device_ops structures	2017-08-11 11:38:30 +08:00
st
tegra	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ti-soc-thermal	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
armada_thermal.c
clock_cooling.c	thermal: convert clock cooling to use an IDA	2017-01-04 12:47:28 +08:00
cpu_cooling.c	thermal: cpu_cooling: Replace kmalloc with kmalloc_array	2017-05-27 17:33:04 -07:00
da9062-thermal.c	thermal: da9062/61: Thermal junction temperature monitoring driver	2017-04-06 21:48:03 -07:00
db8500_thermal.c	thermal: db8500: Fix module autoload	2016-11-23 10:07:35 +08:00
devfreq_cooling.c	trace: thermal: add another parameter 'power' to the tracing function	2017-05-05 15:54:45 +08:00
dove_thermal.c
fair_share.c	thermal: fix source code documentation for parameters	2017-06-29 10:46:31 +08:00
gov_bang_bang.c
hisi_thermal.c	thermal/drivers/hisi: Fix multiple alarm interrupts firing	2017-12-25 14:26:31 +01:00
imx_thermal.c	thermal: imx: Handle return value of clk_prepare_enable	2017-06-30 16:41:55 -07:00
intel_bxt_pmic_thermal.c	mfd: intel_soc_pmic_bxtwc: Remove thermal second level IRQs	2017-06-19 15:44:29 +01:00
intel_pch_thermal.c	thermal: intel_pch_thermal: Fix enable check on Broadwell-DE	2017-08-15 14:32:58 +08:00
intel_powerclamp.c	sched/headers: Prepare for new header dependencies before moving code to <uapi/linux/sched/types.h>	2017-03-02 08:42:27 +01:00
intel_quark_dts_thermal.c
intel_soc_dts_iosf.c
intel_soc_dts_iosf.h
intel_soc_dts_thermal.c	Thermal: Intel SoC DTS: Change interrupt request behavior	2017-05-05 16:00:10 +08:00
Kconfig	Merge branches 'thermal-core', 'thermal-soc', 'thermal-intel' and 'const-thermal-zone-structure' into next	2017-09-08 11:20:04 +08:00
kirkwood_thermal.c
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
max77620_thermal.c	thermal: max77620: fix pinmux conflict on reprobe	2017-06-13 11:07:32 +02:00
mtk_thermal.c	thermal: mediatek: minor mtk_thermal.c cleanups	2017-08-31 21:13:53 +08:00
of-thermal.c
power_allocator.c	thermal: power_allocator: fix one race condition issue for thermal_instances list	2018-04-12 12:32:12 +02:00
qcom-spmi-temp-alarm.c
qoriq_thermal.c	thermal: qoriq: constify thermal_zone_of_device_ops structures	2017-08-11 11:38:29 +08:00
rcar_gen3_thermal.c	thermal: rcar_gen3_thermal: constify thermal_zone_of_device_ops structures	2017-08-11 11:38:29 +08:00
rcar_thermal.c
rockchip_thermal.c	thermal: rockchip: Support the RK3328 SOC in thermal driver	2017-08-11 16:21:38 +08:00
spear_thermal.c
step_wise.c	thermal/drivers/step_wise: Fix temperature regulation misbehavior	2017-12-20 10:10:28 +01:00
tango_thermal.c
thermal-generic-adc.c
thermal_core.c	thermal: core: Fix resources release in error paths in thermal_zone_device_register()	2017-08-11 11:34:07 +08:00
thermal_core.h	thermal: core: Add some new helper functions to free resources	2017-08-11 11:33:49 +08:00
thermal_helpers.c
thermal_hwmon.c	Revert "thermal: thermal_hwmon: Convert to hwmon_device_register_with_info()"	2017-01-25 09:51:08 +08:00
thermal_hwmon.h
thermal_sysfs.c	thermal: core: Add some new helper functions to free resources	2017-08-11 11:33:49 +08:00
uniphier_thermal.c	thermal: uniphier: add UniPhier thermal driver	2017-08-11 10:49:52 +08:00
user_space.c	thermal: fix source code documentation for parameters	2017-06-29 10:46:31 +08:00
x86_pkg_temp_thermal.c	thermal/x86 pkg temp: Convert to hotplug state machine	2016-11-30 10:25:47 +08:00
zx2967_thermal.c	thermal: zx2967: constify thermal_zone_of_device_ops structures	2017-08-11 11:38:30 +08:00