[PATCH 3/3] PM: Use pm_wakeup_pending() in device_suspend()

["Rafael J. Wysocki" <rjw@sisk.pl>]

From: Rafael J. Wysocki <rjw@sisk.pl>

Before starting to suspend a device in device_suspend() check if
there's a request to abort the power transition and return -EBUSY
in that case.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
---
 drivers/base/power/main.c |    5 +++++
 1 file changed, 5 insertions(+)

Index: linux-2.6/drivers/base/power/main.c
===================================================================
--- linux-2.6.orig/drivers/base/power/main.c
+++ linux-2.6/drivers/base/power/main.c
@@ -935,6 +935,11 @@ static void async_suspend(void *data, as
 
 static int device_suspend(struct device *dev)
 {
+	if (pm_wakeup_pending()) {
+		async_error = -EBUSY;
+		return async_error;
+	}
+
 	INIT_COMPLETION(dev->power.completion);
 
 	if (pm_async_enabled && dev->power.async_suspend) {