lkml.org 
[lkml]   [2019]   [Aug]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] ACPI: PM: Print debug messages on device power state changes
Date
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add an acpi_handle_debug() statement to acpi_device_set_power() to
allow ACPI device power state changes to be tracked.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
drivers/acpi/device_pm.c | 4 ++++
1 file changed, 4 insertions(+)

Index: linux-pm/drivers/acpi/device_pm.c
===================================================================
--- linux-pm.orig/drivers/acpi/device_pm.c
+++ linux-pm/drivers/acpi/device_pm.c
@@ -166,6 +166,10 @@ int acpi_device_set_power(struct acpi_de
|| (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
return -EINVAL;

+ acpi_handle_debug(device->handle, "Power state change: %s -> %s\n",
+ acpi_power_state_string(device->power.state),
+ acpi_power_state_string(state));
+
/* Make sure this is a valid target state */

/* There is a special case for D0 addressed below. */


\
 
 \ /
  Last update: 2019-08-02 12:27    [W:0.034 / U:11.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site