[5/5] input: evdev: Never leave the client buffer empty after write

Commit Message

Henrik Rydberg June 23, 2010, 11:14 a.m. UTC

None

Patch

diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c
index 728802f..45eae19 100644
--- a/drivers/input/evdev.c
+++ b/drivers/input/evdev.c
@@ -62,10 +62,13 @@  static void evdev_pass_event(struct evdev_client *client,
 {
 	/*
 	 * Interrupts are disabled, just acquire the lock
+	 * Never leave the client buffer empty
 	 */
 	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)