PM / wakeup: Adjust messaging for wake events during suspend

This adds in a new message to the wakeup code which adds an
indication to the log that suspend was cancelled due to a wake event
occouring during the suspend sequence. It also adjusts the message
printed in suspend.c to reflect the potential that a suspend was
aborted, as opposed to a device failing to suspend.

Without these message adjustments one can end up with a kernel log
that says that a device failed to suspend with no actual device
suspend failures, which can be confusing to the log examiner.

Signed-off-by: Bernie Thompson <bhthompson@chromium.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/base/power/wakeup.c

@@ -707,8 +707,10 @@ bool pm_wakeup_pending(void)
 	}
 	spin_unlock_irqrestore(&events_lock, flags);
 
-	if (ret)
+	if (ret) {
+		pr_info("PM: Wakeup pending, aborting suspend\n");
 		print_active_wakeup_sources();
+	}
 
 	return ret;
 }

kernel/power/suspend.c

@@ -269,7 +269,7 @@ int suspend_devices_and_enter(suspend_state_t state)
 	suspend_test_start();
 	error = dpm_suspend_start(PMSG_SUSPEND);
 	if (error) {
-		printk(KERN_ERR "PM: Some devices failed to suspend\n");
+		pr_err("PM: Some devices failed to suspend, or early wake event detected\n");
 		goto Recover_platform;
 	}
 	suspend_test_finish("suspend devices");