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OpenCloudOS-Kernel
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OpenCloudOS-Kernel/drivers/base
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Vincent Guittot 74fb448630 PM-runtime: Fix deadlock when canceling hrtimer 
When rpm_resume() desactivates the autosuspend timer, it should only
try to cancel hrtimer but not wait for the handler to finish, because
both rpm_resume() and pm_suspend_timer_fn() take the power.lock.

A deadlock is possible as follows:

CPU0                              CPU1
rpm_resume()
  spin_lock_irqsave
                                  pm_suspend_timer_fn()
                                    spin_lock_irqsave
  pm_runtime_deactivate_timer()
    hrtimer_cancel()

It is sufficient to call hrtimer_try_to_cancel() from
pm_runtime_deactivate_timer(), because dev->power.timer_expires
reset to 0 by it, so use that function instead of hrtimer_cancel().

Fixes: 8234f6734c ("PM-runtime: Switch autosuspend over to using hrtimers")
Reported-by: Sunzhaosheng Sun(Zhaosheng) <sunzhaosheng@hisilicon.com>
Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
[ rjw: Changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 		2019-02-21 10:29:00 +01:00
..
firmware_loader firmware: Always initialize the fw_priv list object 2018-09-30 08:49:55 -07:00
power PM-runtime: Fix deadlock when canceling hrtimer 2019-02-21 10:29:00 +01:00
regmap regmap-irq: do not write mask register if mask_base is zero 2019-01-14 22:11:22 +00:00
test driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
Kconfig firmware_loader: move kconfig FW_LOADER entries to its own file 2018-05-14 16:43:10 +02:00
Makefile drivers: base: Introducing software nodes to the firmware node framework 2018-11-26 18:19:11 +01:00
arch_topology.c sched/topology, drivers/base/arch_topology: Rebuild the sched_domain hierarchy when capacities change 2018-09-10 11:05:47 +02:00
attribute_container.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
base.h driver core: remove unnecessary function extern declare 2018-07-16 13:32:20 +02:00
bus.c sysfs: Disable lockdep for driver bind/unbind files 2018-12-19 15:58:40 +01:00
cacheinfo.c cacheinfo: Keep the old value if of_property_read_u32 fails 2019-01-22 13:50:31 +01:00
class.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
component.c component: convert to DEFINE_SHOW_ATTRIBUTE 2018-12-20 16:33:18 +01:00
container.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
core.c Driver core patches for 4.21-rc1 2018-12-28 20:44:29 -08:00
cpu.c x86/speculation/l1tf: Add sysfs reporting for l1tf 2018-06-20 19:10:00 +02:00
dd.c driver core: Add missing dev->bus->need_parent_lock checks 2018-12-19 10:08:34 +01:00
devcon.c drivers: base: Unified device connection lookup 2018-03-22 13:10:29 +01:00
devcoredump.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
devres.c devres: Align data[] to ARCH_KMALLOC_MINALIGN 2018-11-11 11:40:04 -08:00
devtmpfs.c vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled 2018-12-20 16:32:56 +00:00
driver.c driver-core: return EINVAL error instead of BUG_ON() 2018-05-25 18:18:45 +02:00
firmware.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
hypervisor.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
init.c base: fix order of OF initialization 2018-07-07 17:54:29 +02:00
isa.c Merge 4.15-rc3 into driver-core-next 2017-12-11 08:50:05 +01:00
map.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
memory.c Driver core patches for 4.21-rc1 2018-12-28 20:44:29 -08:00
module.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
node.c mm, proc: add KReclaimable to /proc/meminfo 2018-10-26 16:26:32 -07:00
pinctrl.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
platform-msi.c platform-msi: Free descriptors in platform_msi_domain_free() 2018-12-13 09:35:31 +00:00
platform.c drivers/base/platform.c: kmemleak ignore a known leak 2019-01-04 13:13:48 -08:00
property.c device property: fix fwnode_graph_get_next_endpoint() documentation 2018-12-18 23:39:45 +01:00
soc.c base: soc: use put_device() instead of kfree() 2018-03-15 14:37:03 +01:00
swnode.c drivers: base: swnode: check if swnode is NULL before dereferencing it 2018-12-26 10:50:36 +01:00
syscore.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
topology.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00
transport_class.c driver core: Remove redundant license text 2017-12-07 18:36:44 +01:00