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-rw-r--r--driver_oncore.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/driver_oncore.c b/driver_oncore.c
index f27df7af..8cd19a59 100644
--- a/driver_oncore.c
+++ b/driver_oncore.c
@@ -429,6 +429,9 @@ static ssize_t oncore_control_send(struct gps_device_t *session,
static void oncore_event_hook(struct gps_device_t *session, event_t event)
{
+ if (session->context->readonly)
+ return;
+
/*
* Some oncore VP variants that have not been used after long
* power-down will be silent on startup. Provoke