drm/amdkfd: Fix rescheduling of restore worker

Handle the case that the restore worker was already scheduled by another
eviction while the restore was in progress.

Fixes: 9a1c1339abf9 ("drm/amdkfd: Run restore_workers on freezable WQs")
Signed-off-by: Felix Kuehling <felix.kuehling@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Tested-by: Yunxiang Li <Yunxiang.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index aafdf064651fae6391683728086851488e29868d..58c1fe5421934d547bc552d5e72526468951bf69 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -2012,9 +2012,9 @@ static void restore_process_worker(struct work_struct *work)
        if (ret) {
                pr_debug("Failed to restore BOs of pasid 0x%x, retry after %d ms\n",
                         p->pasid, PROCESS_BACK_OFF_TIME_MS);
-               ret = queue_delayed_work(kfd_restore_wq, &p->restore_work,
-                               msecs_to_jiffies(PROCESS_BACK_OFF_TIME_MS));
-               WARN(!ret, "reschedule restore work failed\n");
+               if (mod_delayed_work(kfd_restore_wq, &p->restore_work,
+                                    msecs_to_jiffies(PROCESS_RESTORE_TIME_MS)))
+                       kfd_process_restore_queues(p);
        }
 }