[PATCH 2/3] drm/scheduler: Don't call wait_event_killable for signaled process.
andrey.grodzovsky at amd.com
Tue Apr 24 15:30:35 UTC 2018
Avoid calling wait_event_killable when you are possibly being called
from get_signal routine since in that case you end up in a deadlock
where you are alreay blocked in singla processing any trying to wait
on a new signal.
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
drivers/gpu/drm/scheduler/gpu_scheduler.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler.c b/drivers/gpu/drm/scheduler/gpu_scheduler.c
index 088ff2b..09fd258 100644
@@ -227,9 +227,10 @@ void drm_sched_entity_do_release(struct drm_gpu_scheduler *sched,
* The client will not queue more IBs during this fini, consume existing
- * queued IBs or discard them on SIGKILL
+ * queued IBs or discard them when in death signal state since
+ * wait_event_killable can't receive signals in that state.
- if ((current->flags & PF_SIGNALED) && current->exit_code == SIGKILL)
+ if (current->flags & PF_SIGNALED)
entity->fini_status = -ERESTARTSYS;
entity->fini_status = wait_event_killable(sched->job_scheduled,
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