diff mbox series

[v1,1/2] PM: suspend: Assign pm_suspend_target_state earlier for valid debug logs

Message ID 20250604031024.13093-2-zhangzihuan@kylinos.cn
State New
Headers show
Series [v1,1/2] PM: suspend: Assign pm_suspend_target_state earlier for valid debug logs | expand

Commit Message

Zihuan Zhang June 4, 2025, 3:10 a.m. UTC 
pm_suspend_target_state is used in debug logs inside enter_state(), but
it is only assigned inside suspend_devices_and_enter(), which is too late.

This causes early pm_pr_dbg() output to either show incorrect state or
nothing at all, making suspend debugging harder.

Assign pm_suspend_target_state at the beginning of enter_state() to ensure
early log output is meaningful.

Signed-off-by: Zihuan Zhang <zhangzihuan@kylinos.cn>
---
 kernel/power/suspend.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c
index 76b141b9aac0..16172ca22f21 100644
--- a/kernel/power/suspend.c
+++ b/kernel/power/suspend.c
@@ -584,6 +584,8 @@  static int enter_state(suspend_state_t state)
 	if (!mutex_trylock(&system_transition_mutex))
 		return -EBUSY;
 
+	pm_suspend_target_state = state;
+
 	if (state == PM_SUSPEND_TO_IDLE)
 		s2idle_begin();
 
@@ -616,6 +618,7 @@  static int enter_state(suspend_state_t state)
 	suspend_finish();
  Unlock:
 	filesystems_thaw();
+	pm_suspend_target_state = PM_SUSPEND_ON;
 	mutex_unlock(&system_transition_mutex);
 	return error;
 }