Don't sleep when event age unmatch, and update last_event_age.
It is only for KFD_EVENT_TYPE_SIGNAL which is checked by user space.
Signed-off-by: James Zhu <James.Zhu@xxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_events.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
index b27a79c5f826..23e154811471 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
@@ -964,6 +964,19 @@ int kfd_wait_on_events(struct kfd_process *p,
event_data.event_id);
if (ret)
goto out_unlock;
+
+ /* last_event_age = 0 reserved for backward compatible */
+ if (event_data.last_event_age &&
+ event_waiters[i].event->event_age != event_data.last_event_age) {
+ event_data.last_event_age = event_waiters[i].event->event_age;
+ WRITE_ONCE(event_waiters[i].activated, true);
+
+ if (copy_to_user(&events[i], &event_data,
+ sizeof(struct kfd_event_data))) {
+ ret = -EFAULT;
+ goto out_unlock;
+ }
+ }
}
/* Check condition once. */
--
2.34.1
