We schedule immediate ticks when we need to process events on CSGs,
but those immediate ticks don't change the resched_target because we
want the other groups to stay scheduled for the remaining of the GPU
timeslot they were given. Make sure these immediate ticks don't get
overruled by a sched_queue_delayed_work() that would delay the tick
execution.
Fixes: 99820b4b7e50 ("drm/panthor: Make sure we resume the tick when new jobs
are submitted")
Reported-by: [email protected]
Closes:
https://sashiko.dev/#/patchset/[email protected]?part=9
Signed-off-by: Boris Brezillon <[email protected]>
---
drivers/gpu/drm/panthor/panthor_sched.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panthor/panthor_sched.c
b/drivers/gpu/drm/panthor/panthor_sched.c
index 8fd4d97b062e..ab3e13e44a26 100644
--- a/drivers/gpu/drm/panthor/panthor_sched.c
+++ b/drivers/gpu/drm/panthor/panthor_sched.c
@@ -2667,7 +2667,14 @@ static void sched_resume_tick(struct panthor_device
*ptdev)
else
delay_jiffies = 0;
- sched_queue_delayed_work(sched, tick, delay_jiffies);
+ /* We schedule immediate ticks when we need to process events on CSGs,
+ * but those don't change the resched_target because we want the other
+ * groups to stay scheduled for the remaining of the GPU timeslot they
+ * were given. Make sure those immediate ticks don't get overruled by
+ * a sched_queue_delayed_work() that would delay the tick execution.
+ */
+ if (!delayed_work_pending(&sched->tick_work))
+ sched_queue_delayed_work(sched, tick, delay_jiffies);
}
static void group_schedule_locked(struct panthor_group *group, u32 queue_mask)
--
2.54.0
