drm/nvc0/fifo: prevent CHAN_TABLE_ERROR:CHANNEL_PENDING on fifo fini

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

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
index 1613193e21e6..46dfa68c47bb 100644
--- a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
+++ b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
@@ -250,9 +250,17 @@ nvc0_fifo_chan_fini(struct nouveau_object *object, bool suspend)
         struct nvc0_fifo_priv *priv = (void *)object->engine;
         struct nvc0_fifo_chan *chan = (void *)object;
         u32 chid = chan->base.chid;
+        u32 mask, engine;
 
         nv_mask(priv, 0x003004 + (chid * 8), 0x00000001, 0x00000000);
         nvc0_fifo_playlist_update(priv);
+        mask = nv_rd32(priv, 0x0025a4);
+        for (engine = 0; mask && engine < 16; engine++) {
+                if (!(mask & (1 << engine)))
+                        continue;
+                nv_mask(priv, 0x0025a8 + (engine * 4), 0x00000000, 0x00000000);
+                mask &= ~(1 << engine);
+        }
         nv_wr32(priv, 0x003000 + (chid * 8), 0x00000000);
 
         return nouveau_fifo_channel_fini(&chan->base, suspend);