nvc0: always put all tfb bufs into bufctx

Since we clear the TFB bufctx binding point above, we need to put all of
the active tfb's back in, even if they haven't changed since last time.
Otherwise the tfb may get moved into sysmem and the underlying mapping
will generate write errors.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>

src/gallium/drivers/nouveau/nvc0/nvc0_shader_state.c

@@ -262,11 +262,13 @@ nvc0_tfb_validate(struct nvc0_context *nvc0)
       if (tfb)
          targ->stride = tfb->stride[b];
 
+      buf = nv04_resource(targ->pipe.buffer);
+
+      BCTX_REFN(nvc0->bufctx_3d, TFB, buf, WR);
+
       if (!(nvc0->tfbbuf_dirty & (1 << b)))
          continue;
 
-      buf = nv04_resource(targ->pipe.buffer);
-
       if (!targ->clean)
          nvc0_query_fifo_wait(push, targ->pq);
       BEGIN_NVC0(push, NVC0_3D(TFB_BUFFER_ENABLE(b)), 5);
@@ -280,7 +282,6 @@ nvc0_tfb_validate(struct nvc0_context *nvc0)
          PUSH_DATA(push, 0); /* TFB_BUFFER_OFFSET */
          targ->clean = FALSE;
       }
-      BCTX_REFN(nvc0->bufctx_3d, TFB, buf, WR);
    }
    for (; b < 4; ++b)
       IMMED_NVC0(push, NVC0_3D(TFB_BUFFER_ENABLE(b)), 0);