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

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

diff --git a/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c b/drivers/gpu/drm/nouveau/core/engine/fifo/nvc0.c
index 1613193..46dfa68 100644 (file)
--- 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);