[media] lirc_dev: stray unlock in lirc_dev_fop_poll()

We shouldn't unlock here. I think this was a cut and paste error.

Signed-off-by: Dan Carpenter <[e-mail]>
Acked-by: Jarod Wilson <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/IR/lirc_dev.c

···
 
 	dev_dbg(ir->d.dev, LOGHEAD "poll called\n", ir->d.name, ir->d.minor);
 
-	if (!ir->attached) {
-		mutex_unlock(&ir->irctl_lock);
+	if (!ir->attached)
 		return POLLERR;
-	}
 
 	poll_wait(file, &ir->buf->wait_poll, wait);