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

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[ Upstream commit 2cf49e00d4 ]

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.liu@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
shaoyunl
2021-11-14 12:38:18 -05:00
committed by Greg Kroah-Hartman
parent f0c9f49b0c
commit 74aafe99ef
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
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@@ -1207,6 +1207,11 @@ static int stop_cpsch(struct device_queue_manager *dqm)
bool hanging;
dqm_lock(dqm);
if (!dqm->sched_running) {
dqm_unlock(dqm);
return 0;
}
if (!dqm->is_hws_hang)
unmap_queues_cpsch(dqm, KFD_UNMAP_QUEUES_FILTER_ALL_QUEUES, 0);
hanging = dqm->is_hws_hang || dqm->is_resetting;