kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-24 19:10:26 +00:00
Code Issues Releases Packages Activity
linux/drivers/base/power
History
Charan Teja Kalla c272bafb0a PM: runtime: fix denying of auto suspend in pm_suspend_timer_fn() 
[ Upstream commit 40d3b40dce ]

pm_runtime_put_autosuspend() schedules a hrtimer to expire
at "dev->power.timer_expires". If the hrtimer's callback,
pm_suspend_timer_fn(), observes that the current time equals
"dev->power.timer_expires", it unexpectedly bails out instead of
proceeding with runtime suspend.

pm_suspend_timer_fn():

 if (expires > 0 && expires < ktime_get_mono_fast_ns()) {
 	dev->power.timer_expires = 0;
 	rpm_suspend(..)
 }

Additionally, as ->timer_expires is not cleared, all the future auto
suspend requests will not schedule hrtimer to perform auto suspend.

rpm_suspend():

 if ((rpmflags & RPM_AUTO) &&...) {
 	if (!(dev->power.timer_expires && ...) { <-- this will fail.
 		hrtimer_start_range_ns(&dev->power.suspend_timer,...);
 	}
 }

Fix this by as well checking if current time reaches the set expiration.

Co-developed-by: Patrick Daly <quic_pdaly@quicinc.com>
Signed-off-by: Patrick Daly <quic_pdaly@quicinc.com>
Signed-off-by: Charan Teja Kalla <quic_charante@quicinc.com>
Link: https://patch.msgid.link/20250515064125.1211561-1-quic_charante@quicinc.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-06-27 11:07:32 +01:00
..
clock_ops.c PM: runtime: add devm_pm_clk_create helper 2021-08-26 11:28:07 -07:00
common.c PM: domains: Extend dev_pm_domain_detach() doc 2022-04-13 17:07:58 +02:00
domain.c pmdomain: core: Fix error checking in genpd_dev_pm_attach_by_id() 2025-06-27 11:07:20 +01:00
domain_governor.c PM: domains: Allocate governor data dynamically based on a genpd governor 2022-05-19 20:16:05 +02:00
generic_ops.c drivers: base: power: add proper SPDX identifiers on files that did not have them. 2019-04-04 20:03:40 +02:00
main.c PM: sleep: Fix power.is_suspended cleanup for direct-complete devices 2025-06-27 11:07:18 +01:00
Makefile PM / QoS: Initial kunit test 2019-11-29 12:04:49 +01:00
power.h PM: sleep: wakeirq: fix wake irq arming 2023-08-03 10:24:16 +02:00
qos-test.c kunit: allow kunit tests to be loaded as a module 2020-01-09 16:42:29 -07:00
qos.c PM / QoS: Restore DEV_PM_QOS_MIN/MAX_FREQUENCY 2019-11-29 12:04:50 +01:00
runtime.c PM: runtime: fix denying of auto suspend in pm_suspend_timer_fn() 2025-06-27 11:07:32 +01:00
sysfs.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
trace.c rtc: Extend timeout for waiting for UIP to clear to 1s 2024-01-31 16:17:01 -08:00
wakeirq.c PM: sleep: wakeirq: fix wake irq warning in system suspend 2024-04-03 15:19:30 +02:00
wakeup.c PM: wakeup: Add extra debugging statement for multiple active IRQs 2022-09-03 20:04:33 +02:00
wakeup_stats.c PM: wakeup: remove redundant assignment to variable retval 2021-04-22 15:22:38 +02:00