linux-kernel - [PATCH 1/4] include/linux/suspend.h: Only show pm_pr

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Date:   Thu, 18 May 2023 12:27:49 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     <rafael@...nel.org>, <hdegoede@...hat.com>,
        <linus.walleij@...aro.org>
CC:     <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>,
        <platform-driver-x86@...r.kernel.org>, <linux-pm@...r.kernel.org>,
        <Shyam-sundar.S-k@....com>, <Basavaraj.Natikar@....com>,
        Mario Limonciello <mario.limonciello@....com>
Subject: [PATCH 1/4] include/linux/suspend.h: Only show pm_pr_dbg messages at suspend/resume

All uses in the kernel are currently already oriented around
suspend/resume. As some other parts of the kernel may also use these
messages in functions that could also be used outside of
suspend/resume, only enable in suspend/resume path.

Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
 include/linux/suspend.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/linux/suspend.h b/include/linux/suspend.h
index d0d4598a7b3f..a40f2e667e09 100644
--- a/include/linux/suspend.h
+++ b/include/linux/suspend.h
@@ -564,7 +564,8 @@ static inline int pm_dyn_debug_messages_on(void)
 #endif
 #define __pm_pr_dbg(fmt, ...)					\
 	do {							\
-		if (pm_debug_messages_on)			\
+		if (pm_debug_messages_on &&			\
+		    pm_suspend_target_state != PM_SUSPEND_ON)	\
 			printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__);	\
 		else if (pm_dyn_debug_messages_on())		\
 			pr_debug(fmt, ##__VA_ARGS__);	\
@@ -589,7 +590,8 @@ static inline int pm_dyn_debug_messages_on(void)
 /**
  * pm_pr_dbg - print pm sleep debug messages
  *
- * If pm_debug_messages_on is enabled, print message.
+ * If pm_debug_messages_on is enabled and the system is entering/leaving
+ *      suspend, print message.
  * If pm_debug_messages_on is disabled and CONFIG_DYNAMIC_DEBUG is enabled,
  *	print message only from instances explicitly enabled on dynamic debug's
  *	control.
-- 
2.34.1