connector: convert to single-threaded workqueue

From: Evgeniy Polyakov <[e-mail]>

We don't need one cqueue thread for each CPU. cqueue is used for
receiving userspace datagrams, which are very rare and thus will
happily live with a single queue.

Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/connector/cn_queue.c

···
 
 	dev->nls = nls;
 
-	dev->cn_queue = create_workqueue(dev->name);
+	dev->cn_queue = create_singlethread_workqueue(dev->name);
 	if (!dev->cn_queue) {
 		kfree(dev);
 		return NULL;