[POWERPC] powermac: disallow pmu sleep notifiers from aborting sleep

Tracing through the code, no current PMU sleep notifier can abort sleep.
Since no new PMU sleep notifiers should be added, this patch simplifies the
code and removes the ability to abort sleep.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

drivers/macintosh/via-pmu.c

@@ -1769,35 +1769,21 @@ EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
 #if defined(CONFIG_PM) && defined(CONFIG_PPC32)
 
 /* Sleep is broadcast last-to-first */
-static int
-broadcast_sleep(int when, int fallback)
+static void broadcast_sleep(int when)
 {
-	int ret = PBOOK_SLEEP_OK;
 	struct list_head *list;
 	struct pmu_sleep_notifier *notifier;
 
 	for (list = sleep_notifiers.prev; list != &sleep_notifiers;
 	     list = list->prev) {
 		notifier = list_entry(list, struct pmu_sleep_notifier, list);
-		ret = notifier->notifier_call(notifier, when);
-		if (ret != PBOOK_SLEEP_OK) {
-			printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
-			       when, notifier, notifier->notifier_call);
-			for (; list != &sleep_notifiers; list = list->next) {
-				notifier = list_entry(list, struct pmu_sleep_notifier, list);
-				notifier->notifier_call(notifier, fallback);
-			}
-			return ret;
-		}
+		notifier->notifier_call(notifier, when);
 	}
-	return ret;
 }
 
 /* Wake is broadcast first-to-last */
-static int
-broadcast_wake(void)
+static void broadcast_wake(void)
 {
-	int ret = PBOOK_SLEEP_OK;
 	struct list_head *list;
 	struct pmu_sleep_notifier *notifier;
 
@@ -1806,7 +1792,6 @@ broadcast_wake(void)
 		notifier = list_entry(list, struct pmu_sleep_notifier, list);
 		notifier->notifier_call(notifier, PBOOK_WAKE);
 	}
-	return ret;
 }
 
 /*
@@ -2013,12 +1998,8 @@ pmac_suspend_devices(void)
 
 	pm_prepare_console();
 	
-	/* Notify old-style device drivers & userland */
-	ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
-	if (ret != PBOOK_SLEEP_OK) {
-		printk(KERN_ERR "Sleep rejected by drivers\n");
-		return -EBUSY;
-	}
+	/* Notify old-style device drivers */
+	broadcast_sleep(PBOOK_SLEEP_REQUEST);
 
 	/* Sync the disks. */
 	/* XXX It would be nice to have some way to ensure that
@@ -2028,12 +2009,7 @@ pmac_suspend_devices(void)
 	 */
 	sys_sync();
 
-	/* Sleep can fail now. May not be very robust but useful for debugging */
-	ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
-	if (ret != PBOOK_SLEEP_OK) {
-		printk(KERN_ERR "Driver sleep failed\n");
-		return -EBUSY;
-	}
+	broadcast_sleep(PBOOK_SLEEP_NOW);
 
 	/* Send suspend call to devices, hold the device core's dpm_sem */
 	ret = device_suspend(PMSG_SUSPEND);