kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-16 22:39:48 +00:00
Code Issues Releases Packages Activity
linux/drivers/base/power
History
Hsin-Yi Wang f0762b6a3a PM: domains: Ensure genpd_debugfs_dir exists before remove 
[ Upstream commit 37101d3c71 ]

Both genpd_debug_add() and genpd_debug_remove() may be called
indirectly by other drivers while genpd_debugfs_dir is not yet
set. For example, drivers can call pm_genpd_init() in probe or
pm_genpd_init() in probe fail/cleanup path:

pm_genpd_init()
 --> genpd_debug_add()

pm_genpd_remove()
 --> genpd_remove()
   --> genpd_debug_remove()

At this time, genpd_debug_init() may not yet be called.

genpd_debug_add() checks that if genpd_debugfs_dir is NULL, it
will return directly. Make sure this is also checked
in pm_genpd_remove(), otherwise components under debugfs root
which has the same name as other components under pm_genpd may
be accidentally removed, since NULL represents debugfs root.

Fixes: 718072ceb2 ("PM: domains: create debugfs nodes when adding power domains")
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2022-08-17 15:14:17 +02:00
..
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 PM: domains: Ensure genpd_debugfs_dir exists before remove 2022-08-17 15:14:17 +02:00
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 Merge branches 'pm-sleep', 'pm-domains' and 'pm-docs' 2022-03-18 18:29:21 +01:00
Makefile PM / QoS: Initial kunit test 2019-11-29 12:04:49 +01:00
power.h PM / wakeirq: support enabling wake-up irq after runtime_suspend called 2021-10-27 20:49:32 +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 supplier device management during consumer probe 2022-07-01 21:04:15 +02:00
sysfs.c drivers core: Miscellaneous changes for sysfs_emit 2020-10-02 13:12:07 +02:00
trace.c rtc: Check return value from mc146818_get_time() 2021-12-16 21:50:06 +01:00
wakeirq.c PM: sleep: wakeup: Fix typos in comments 2022-03-01 16:17:32 +01:00
wakeup.c PM: wakeup: expose pm_wakeup_pending to modules 2022-05-19 19:40:25 +02:00
wakeup_stats.c PM: wakeup: remove redundant assignment to variable retval 2021-04-22 15:22:38 +02:00