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linux/kernel/power
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Chen Yu 148b6f4cc3 PM: hibernate: Fix the exclusive get block device in test_resume mode 
Commit 5904de0d73 ("PM: hibernate: Do not get block device exclusively
in test_resume mode") fixes a hibernation issue under test_resume mode.
That commit is supposed to open the block device in non-exclusive mode
when in test_resume. However the code does the opposite, which is against
its description.

In summary, the swap device is only opened exclusively by swsusp_check()
with its corresponding *close(), and must be in non test_resume mode.
This is to avoid the race condition that different processes scribble the
device at the same time. All the other cases should use non-exclusive mode.

Fix it by really disabling exclusive mode under test_resume.

Fixes: 5904de0d73 ("PM: hibernate: Do not get block device exclusively in test_resume mode")
Closes: https://lore.kernel.org/lkml/000000000000761f5f0603324129@google.com/
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Tested-by: Chenzhou Feng <chenzhoux.feng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2023-09-12 11:45:15 +02:00
..
autosleep.c PM: sleep: fix typos in comments 2021-04-08 19:37:21 +02:00
console.c
energy_model.c PM: EM: fix memory leak with using debugfs_lookup() 2023-02-09 20:36:10 +01:00
hibernate.c PM: hibernate: Fix the exclusive get block device in test_resume mode 2023-09-12 11:45:15 +02:00
Kconfig PM: sleep: Remove "select SRCU" 2023-01-20 17:53:07 +01:00
main.c - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
Makefile PM: sleep: Narrow down -DDEBUG on kernel/power/ files 2022-04-13 16:34:01 +02:00
power.h PM: hibernate: Rename function parameter from snapshot_test to exclusive 2023-09-12 11:45:15 +02:00
poweroff.c tty: sysrq: switch sysrq handlers from int to u8 2023-07-25 19:21:03 +02:00
process.c workqueue: Introduce show_freezable_workqueues 2023-03-23 15:55:38 -10:00
qos.c PM: QoS: Add check to make sure CPU latency is non-negative 2023-08-22 21:37:29 +02:00
snapshot.c PM: hibernate: don't store zero pages in the image file 2023-07-24 09:51:59 +02:00
suspend.c Scheduler changes for v6.1: 2022-10-10 09:10:28 -07:00
suspend_test.c PM: suspend: fix return value of __setup handler 2022-03-01 18:55:07 +01:00
swap.c PM: hibernate: Rename function parameter from snapshot_test to exclusive 2023-09-12 11:45:15 +02:00
user.c freezer: Have {,un}lock_system_sleep() save/restore flags 2022-09-07 21:53:48 +02:00
wakelock.c PM: wakeup: simplify the output logic of pm_show_wakelocks() 2022-01-25 18:27:02 +01:00