binder: call poll_wait() unconditionally.

Because we're not guaranteed that subsequent calls
to poll() will have a poll_table_struct parameter
with _qproc set. When _qproc is not set, poll_wait()
is a noop, and we won't be woken up correctly.

Signed-off-by: Martijn Coenen <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/android/binder.c

···
 	}
 }
 
-static int binder_has_thread_work(struct binder_thread *thread)
-{
-	return !binder_worklist_empty(thread->proc, &thread->todo) ||
-		thread->looper_need_return;
-}
-
 static int binder_put_node_cmd(struct binder_proc *proc,
 			       struct binder_thread *thread,
 			       void __user **ptrp,
···
 
 	binder_inner_proc_unlock(thread->proc);
 
-	if (binder_has_work(thread, wait_for_proc_work))
-		return POLLIN;
-
 	poll_wait(filp, &thread->wait, wait);
 
-	if (binder_has_thread_work(thread))
+	if (binder_has_work(thread, wait_for_proc_work))
 		return POLLIN;
 
 	return 0;