# \[PATCH Bluez v2\] adapter: Fix discovery trigger for 0 second delay

- From: Frédéric Danis \<\>
- Date: 2021-03-12 12:00:45 
- List: linux-bluetooth
- Page: https://ratatoskr.run/linux-bluetooth/2021/03/9678940
- Thread: https://ratatoskr.run/linux-bluetooth/2021/03/9678940/t.md

```text
From: Frédéric Danis <redacted>

When calling `StartDiscovery` the effective start can take around 10 ms or
up to 700 ms.
g_timeout_add_seconds() call doesn't ensure the time for the first call of
the timer if the delay is less or equal to 1 second.
---
v2: Fix issue founs by CI

 src/adapter.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/adapter.c b/src/adapter.c
index cc0849f99..3078ce1a8 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -1797,6 +1797,13 @@ static void trigger_start_discovery(struct btd_adapter *adapter, guint delay)
 	if (!btd_adapter_get_powered(adapter))
 		return;
 
+	if (!delay) {
+		adapter->discovery_idle_timeout = g_idle_add(
+						start_discovery_timeout,
+						adapter);
+		return;
+	}
+
 	adapter->discovery_idle_timeout = g_timeout_add_seconds(delay,
 					start_discovery_timeout, adapter);
 }
-- 
2.18.0

```