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Diffstat (limited to 'drivers/base/power/suspend.c')
-rw-r--r--drivers/base/power/suspend.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/base/power/suspend.c b/drivers/base/power/suspend.c
index a0b5cf689e6..0ec44ef840b 100644
--- a/drivers/base/power/suspend.c
+++ b/drivers/base/power/suspend.c
@@ -39,12 +39,25 @@ int suspend_device(struct device * dev, pm_message_t state)
{
int error = 0;
- dev_dbg(dev, "suspending\n");
+ if (dev->power.power_state) {
+ dev_dbg(dev, "PM: suspend %d-->%d\n",
+ dev->power.power_state, state);
+ }
+ if (dev->power.pm_parent
+ && dev->power.pm_parent->power.power_state) {
+ dev_err(dev,
+ "PM: suspend %d->%d, parent %s already %d\n",
+ dev->power.power_state, state,
+ dev->power.pm_parent->bus_id,
+ dev->power.pm_parent->power.power_state);
+ }
dev->power.prev_state = dev->power.power_state;
- if (dev->bus && dev->bus->suspend && !dev->power.power_state)
+ if (dev->bus && dev->bus->suspend && !dev->power.power_state) {
+ dev_dbg(dev, "suspending\n");
error = dev->bus->suspend(dev, state);
+ }
return error;
}