struct input_event buffer[];
};
-static int evdev_set_clk_type(struct evdev_client *client, unsigned int clkid)
-{
- switch (clkid) {
-
- case CLOCK_REALTIME:
- client->clk_type = EV_CLK_REAL;
- break;
- case CLOCK_MONOTONIC:
- client->clk_type = EV_CLK_MONO;
- break;
- case CLOCK_BOOTTIME:
- client->clk_type = EV_CLK_BOOT;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
/* flush queued events of type @type, caller must hold client->buffer_lock */
static void __evdev_flush_queue(struct evdev_client *client, unsigned int type)
{
client->head = head;
}
-/* queue SYN_DROPPED event */
-static void evdev_queue_syn_dropped(struct evdev_client *client)
+static void __evdev_queue_syn_dropped(struct evdev_client *client)
{
- unsigned long flags;
struct input_event ev;
ktime_t time;
ev.code = SYN_DROPPED;
ev.value = 0;
- spin_lock_irqsave(&client->buffer_lock, flags);
-
client->buffer[client->head++] = ev;
client->head &= client->bufsize - 1;
client->tail = (client->head - 1) & (client->bufsize - 1);
client->packet_head = client->tail;
}
+}
+
+static void evdev_queue_syn_dropped(struct evdev_client *client)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&client->buffer_lock, flags);
+ __evdev_queue_syn_dropped(client);
+ spin_unlock_irqrestore(&client->buffer_lock, flags);
+}
+
+static int evdev_set_clk_type(struct evdev_client *client, unsigned int clkid)
+{
+ unsigned long flags;
+
+ if (client->clk_type == clkid)
+ return 0;
+
+ switch (clkid) {
+
+ case CLOCK_REALTIME:
+ client->clk_type = EV_CLK_REAL;
+ break;
+ case CLOCK_MONOTONIC:
+ client->clk_type = EV_CLK_MONO;
+ break;
+ case CLOCK_BOOTTIME:
+ client->clk_type = EV_CLK_BOOT;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /*
+ * Flush pending events and queue SYN_DROPPED event,
+ * but only if the queue is not empty.
+ */
+ spin_lock_irqsave(&client->buffer_lock, flags);
+
+ if (client->head != client->tail) {
+ client->packet_head = client->head = client->tail;
+ __evdev_queue_syn_dropped(client);
+ }
spin_unlock_irqrestore(&client->buffer_lock, flags);
+
+ return 0;
}
static void __pass_event(struct evdev_client *client,