linux-kernel - [PATCH 2/2] ACPI / PM: Add debug statements to acpi_pm_notify

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Date:   Fri, 11 Aug 2017 01:32:40 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Linux ACPI <linux-acpi@...r.kernel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Linux PM <linux-pm@...r.kernel.org>
Subject: [PATCH 2/2] ACPI / PM: Add debug statements to acpi_pm_notify_handler()

From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Add statements to trace invocations of the ACPI PM notify handler
and the work functions called by it.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/device_pm.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Index: linux-pm/drivers/acpi/device_pm.c
===================================================================
--- linux-pm.orig/drivers/acpi/device_pm.c
+++ linux-pm/drivers/acpi/device_pm.c
@@ -401,6 +401,8 @@ static void acpi_pm_notify_handler(acpi_
 	if (val != ACPI_NOTIFY_DEVICE_WAKE)
 		return;
 
+	acpi_handle_debug(handle, "Wake notify\n");
+
 	adev = acpi_bus_get_acpi_device(handle);
 	if (!adev)
 		return;
@@ -409,8 +411,12 @@ static void acpi_pm_notify_handler(acpi_
 
 	if (adev->wakeup.flags.notifier_present) {
 		pm_wakeup_ws_event(adev->wakeup.ws, 0, acpi_s2idle_wakeup());
-		if (adev->wakeup.context.func)
+		if (adev->wakeup.context.func) {
+			acpi_handle_debug(handle, "Running %pF for %s\n",
+					  adev->wakeup.context.func,
+					  dev_name(adev->wakeup.context.dev));
 			adev->wakeup.context.func(&adev->wakeup.context);
+		}
 	}
 
 	mutex_unlock(&acpi_pm_notifier_lock);