diff options
| author | Chen Yu <yu.c.chen@intel.com> | 2023-04-14 20:10:26 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-11 23:03:38 +0900 |
| commit | 208ba216cc9020e9b94e4c601d3419bb4fb7587f (patch) | |
| tree | 53c3e24eea8fef3d92881ec2506e0adda4da46f8 | |
| parent | fc3153a91486b95f8987a849a7080e18c9baf36f (diff) | |
PM: hibernate: Turn snapshot_test into global variable
[ Upstream commit 08169a162f97819d3e5b4a342bb9cf5137787154 ]
There is need to check snapshot_test and open block device
in different mode, so as to avoid the race condition.
No functional changes intended.
Suggested-by: Pavankumar Kondeti <quic_pkondeti@quicinc.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Stable-dep-of: 5904de0d735b ("PM: hibernate: Do not get block device exclusively in test_resume mode")
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | kernel/power/hibernate.c | 7 | ||||
| -rw-r--r-- | kernel/power/power.h | 1 |
2 files changed, 7 insertions, 1 deletions
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c index 793c55a2becb..aa551b093c3f 100644 --- a/kernel/power/hibernate.c +++ b/kernel/power/hibernate.c @@ -64,6 +64,7 @@ enum { static int hibernation_mode = HIBERNATION_SHUTDOWN; bool freezer_test_done; +bool snapshot_test; static const struct platform_hibernation_ops *hibernation_ops; @@ -716,7 +717,6 @@ static int load_image_and_restore(void) */ int hibernate(void) { - bool snapshot_test = false; unsigned int sleep_flags; int error; @@ -744,6 +744,9 @@ int hibernate(void) if (error) goto Exit; + /* protected by system_transition_mutex */ + snapshot_test = false; + lock_device_hotplug(); /* Allocate memory management structures */ error = create_basic_memory_bitmaps(); @@ -940,6 +943,8 @@ static int software_resume(void) */ mutex_lock_nested(&system_transition_mutex, SINGLE_DEPTH_NESTING); + snapshot_test = false; + if (swsusp_resume_device) goto Check_image; diff --git a/kernel/power/power.h b/kernel/power/power.h index b4f433943209..b83c8d5e188d 100644 --- a/kernel/power/power.h +++ b/kernel/power/power.h @@ -59,6 +59,7 @@ asmlinkage int swsusp_save(void); /* kernel/power/hibernate.c */ extern bool freezer_test_done; +extern bool snapshot_test; extern int hibernation_snapshot(int platform_mode); extern int hibernation_restore(int platform_mode); |