Add event_age tracking when receiving interrupt.
Signed-off-by: James Zhu <James.Zhu@xxxxxxx>
---
drivers/gpu/drm/amd/amdkfd/kfd_events.c | 6 ++++++
drivers/gpu/drm/amd/amdkfd/kfd_events.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.c b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
index 7ff5c4e1b7e2..c7689181cc22 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_events.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.c
@@ -431,6 +431,7 @@ int kfd_event_create(struct file *devkfd, struct kfd_process *p,
if (!ret) {
*event_id = ev->event_id;
*event_trigger_data = ev->event_id;
+ ev->event_age = 1;
} else {
kfree(ev);
}
@@ -629,6 +630,11 @@ static void set_event(struct kfd_event *ev)
* updating the wait queues in kfd_wait_on_events.
*/
ev->signaled = !ev->auto_reset || !waitqueue_active(&ev->wq);
+ if (!(++ev->event_age)) {
+ /* Never wrap back to reserved/default event age 0/1 */
+ ev->event_age = 2;
+ WARN_ONCE(1, "event_age wrap back!");
+ }
list_for_each_entry(waiter, &ev->wq.head, wait.entry)
WRITE_ONCE(waiter->activated, true);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_events.h b/drivers/gpu/drm/amd/amdkfd/kfd_events.h
index 1c62c8dd6460..52ccfd397c2b 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_events.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_events.h
@@ -53,6 +53,7 @@ struct signal_page;
struct kfd_event {
u32 event_id;
+ u64 event_age;
bool signaled;
bool auto_reset;
--
2.34.1
