From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Fri, 9 May 2025 12:51:47 +0000 (+0200)
Subject: PM: sleep: Print PM debug messages during hibernation
X-Git-Tag: v6.16-rc1~160^2~1^3~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1b17d4525bca3916644c41e01522df8fa0f8b90b;p=thirdparty%2Fkernel%2Flinux.git

PM: sleep: Print PM debug messages during hibernation

Commit cdb8c100d8a4 ("include/linux/suspend.h: Only show pm_pr_dbg
messages at suspend/resume") caused PM debug messages to only be
printed during system-wide suspend and resume in progress, but it
forgot about hibernation.

Address this by adding a check for hibernation in progress to
pm_debug_messages_should_print().

Fixes: cdb8c100d8a4 ("include/linux/suspend.h: Only show pm_pr_dbg messages at suspend/resume")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patch.msgid.link/4998903.GXAFRqVoOG@rjwysocki.net
---

diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index f4db2e82fd873..c503baf170aff 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -90,6 +90,11 @@ void hibernate_release(void)
 	atomic_inc(&hibernate_atomic);
 }
 
+bool hibernation_in_progress(void)
+{
+	return !atomic_read(&hibernate_atomic);
+}
+
 bool hibernation_available(void)
 {
 	return nohibernate == 0 &&
diff --git a/kernel/power/main.c b/kernel/power/main.c
index 97746f08b762b..fb20a6e26fb6a 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -613,7 +613,8 @@ bool pm_debug_messages_on __read_mostly;
 
 bool pm_debug_messages_should_print(void)
 {
-	return pm_debug_messages_on && pm_suspend_target_state != PM_SUSPEND_ON;
+	return pm_debug_messages_on && (hibernation_in_progress() ||
+		pm_suspend_target_state != PM_SUSPEND_ON);
 }
 EXPORT_SYMBOL_GPL(pm_debug_messages_should_print);
 
diff --git a/kernel/power/power.h b/kernel/power/power.h
index c352dea2f67b5..f8496f40b54fa 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -71,10 +71,14 @@ extern void enable_restore_image_protection(void);
 static inline void enable_restore_image_protection(void) {}
 #endif /* CONFIG_STRICT_KERNEL_RWX */
 
+extern bool hibernation_in_progress(void);
+
 #else /* !CONFIG_HIBERNATION */
 
 static inline void hibernate_reserved_size_init(void) {}
 static inline void hibernate_image_size_init(void) {}
+
+static inline bool hibernation_in_progress(void) { return false; }
 #endif /* !CONFIG_HIBERNATION */
 
 #define power_attr(_name) \