[PATCH] drm/amd/amdkfd: Fix kernel panic when reset failed and been triggered again

[shaoyunl]

In SRIOV configuration, the reset may failed to bring asic back to normal but 
stop cpsch
already been called, the start_cpsch will not be called since there is no 
resume in this
case.  When reset been triggered again, driver should avoid to do 
uninitialization again.

Signed-off-by: shaoyunl <shaoyun....@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c 
b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index 42b2cc999434..bcc8980d77e0 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -1228,12 +1228,14 @@ static int stop_cpsch(struct device_queue_manager *dqm)
        if (!dqm->is_hws_hang)
                unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0);
        hanging = dqm->is_hws_hang || dqm->is_resetting;
-       dqm->sched_running = false;
 
-       pm_release_ib(&dqm->packet_mgr);
+       if (dqm->sched_running) {
+               dqm->sched_running = false;
+               pm_release_ib(&dqm->packet_mgr);
+               kfd_gtt_sa_free(dqm->dev, dqm->fence_mem);
+               pm_uninit(&dqm->packet_mgr, hanging);
+       }
 
-       kfd_gtt_sa_free(dqm->dev, dqm->fence_mem);
-       pm_uninit(&dqm->packet_mgr, hanging);
        dqm_unlock(dqm);
 
        return 0;
-- 
2.17.1