drm/nouveau: signal pending fences when channel has been killed

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/nouveau_chan.c

@@ -55,6 +55,8 @@ nouveau_channel_killed(struct nvif_notify *ntfy)
 	struct nouveau_cli *cli = (void *)chan->user.client;
 	NV_PRINTK(warn, cli, "channel %d killed!\n", chan->chid);
 	atomic_set(&chan->killed, 1);
+	if (chan->fence)
+		nouveau_fence_context_kill(chan->fence, -ENODEV);
 	return NVIF_NOTIFY_DROP;
 }
 

drivers/gpu/drm/nouveau/nouveau_fence.c

@@ -87,7 +87,7 @@ nouveau_local_fence(struct dma_fence *fence, struct nouveau_drm *drm)
 }
 
 void
-nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
+nouveau_fence_context_kill(struct nouveau_fence_chan *fctx, int error)
 {
 	struct nouveau_fence *fence;
 
@@ -95,11 +95,19 @@ nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
 	while (!list_empty(&fctx->pending)) {
 		fence = list_entry(fctx->pending.next, typeof(*fence), head);
 
+		if (error)
+			dma_fence_set_error(&fence->base, error);
+
 		if (nouveau_fence_signal(fence))
 			nvif_notify_put(&fctx->notify);
 	}
 	spin_unlock_irq(&fctx->lock);
+}
 
+void
+nouveau_fence_context_del(struct nouveau_fence_chan *fctx)
+{
+	nouveau_fence_context_kill(fctx, 0);
 	nvif_notify_fini(&fctx->notify);
 	fctx->dead = 1;
 

drivers/gpu/drm/nouveau/nouveau_fence.h

@@ -63,6 +63,7 @@ struct nouveau_fence_priv {
 void nouveau_fence_context_new(struct nouveau_channel *, struct nouveau_fence_chan *);
 void nouveau_fence_context_del(struct nouveau_fence_chan *);
 void nouveau_fence_context_free(struct nouveau_fence_chan *);
+void nouveau_fence_context_kill(struct nouveau_fence_chan *, int error);
 
 int nv04_fence_create(struct nouveau_drm *);
 int nv04_fence_mthd(struct nouveau_channel *, u32, u32, u32);