---

yaml
---
r: 202180
b: refs/heads/master
c: e725a49
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6967b4d9de4a7cf3b00cd9a93981d3206d75a1d8
+refs/heads/master: e725a4945d6eedd400dd5d0ead293d980a2f76ec

trunk/drivers/input/evdev.c

@@ -54,11 +54,15 @@ static void evdev_pass_event(struct evdev_client *client,
 			     struct input_event *event)
 {
 	/*
-	 * Interrupts are disabled, just acquire the lock
+	 * Interrupts are disabled, just acquire the lock.
+	 * Make sure we don't leave with the client buffer
+	 * "empty" by having client->head == client->tail.
 	 */
 	spin_lock(&client->buffer_lock);
-	client->buffer[client->head++] = *event;
-	client->head &= client->bufsize - 1;
+	do {
+		client->buffer[client->head++] = *event;
+		client->head &= client->bufsize - 1;
+	} while (client->head == client->tail);
 	spin_unlock(&client->buffer_lock);
 
 	if (event->type == EV_SYN)