powerpc/adb: Use set_current_state()

Signed-off-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/drivers/macintosh/adb.c b/drivers/macintosh/adb.c
index 75049e7..b026896 100644
--- a/drivers/macintosh/adb.c
+++ b/drivers/macintosh/adb.c
@@ -710,7 +710,7 @@
 	req = NULL;
 	spin_lock_irqsave(&state->lock, flags);
 	add_wait_queue(&state->wait_queue, &wait);
-	current->state = TASK_INTERRUPTIBLE;
+	set_current_state(TASK_INTERRUPTIBLE);
 
 	for (;;) {
 		req = state->completed;
@@ -734,7 +734,7 @@
 		spin_lock_irqsave(&state->lock, flags);
 	}
 
-	current->state = TASK_RUNNING;
+	set_current_state(TASK_RUNNING);
 	remove_wait_queue(&state->wait_queue, &wait);
 	spin_unlock_irqrestore(&state->lock, flags);