diff options
| -rw-r--r-- | drivers/input/evdev.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 30836c05edd7..cd323254ca6f 100644 --- a/drivers/input/evdev.c +++ b/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) |