drm/amdkfd: Signal eviction fence on process destruction (v2)

Otherwise BOs may wait for the fence indefinitely and never be destroyed.

v2: Signal the fence right after destroying queues to avoid unnecessary
    delaye-delete in kfd_process_wq_release

Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: xinhui pan <xinhui.pan@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 22abdbc..c92285f 100644 (file)
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -641,6 +641,11 @@ static void kfd_process_notifier_release(struct mmu_notifier *mn,
 
        /* Indicate to other users that MM is no longer valid */
        p->mm = NULL;
+       /* Signal the eviction fence after user mode queues are
+        * destroyed. This allows any BOs to be freed without
+        * triggering pointless evictions or waiting for fences.
+        */
+       dma_fence_signal(p->ef);
 
        mutex_unlock(&p->mutex);