PM: sleep: Print PM debug messages during hibernation

Commit cdb8c10 ("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: cdb8c10 ("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

Author: rafaeljw

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 &&

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);
 

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) \