[PATCH] sleep: Fix oops in enter_state

[Pavel Machek]

If ACPI sleep is not configured, but someone still wants to run
swsusp, he'd get oops in enter_state. This is regression since 2.6.14
and this fixes it. 

Signed-off-by: Pavel Machek <pavel@xxxxxxx>

diff --git a/kernel/power/main.c b/kernel/power/main.c
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -167,7 +167,7 @@ static int enter_state(suspend_state_t s
 {
 	int error;
 
-	if (pm_ops->valid && !pm_ops->valid(state))
+	if (pm_ops && pm_ops->valid && !pm_ops->valid(state))
 		return -ENODEV;
 	if (down_trylock(&pm_sem))
 		return -EBUSY;

-- 
Thanks, Sharp!
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