linux-kernel - [PATCH 3/3] PM: Use pm_wakeup_pending() in device

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Message-Id: <201012030123.43786.rjw@sisk.pl>
Date:	Fri, 3 Dec 2010 01:23:43 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: [PATCH 3/3] PM: Use pm_wakeup_pending() in device_suspend()

From: Rafael J. Wysocki <rjw@...k.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@...k.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) {

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