nvc0: fragprog may not be set when e.g. clearing

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>

diff --git a/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c b/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
index d4931cbc675d55fc6230fe112955a66bc699e6bd..68fd73064c8ecb513dc1276f182fabb6cf20d4e4 100644 (file)
--- a/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
+++ b/src/gallium/drivers/nouveau/nvc0/nvc0_state_validate.c
@@ -605,8 +605,9 @@ nvc0_validate_min_samples(struct nvc0_context *nvc0)
       // have to do sample shading "to the max", otherwise there's no way to
       // tell which sets of samples are covered by the current invocation.
       // Similarly for reading the framebuffer.
-      if (nvc0->fragprog->fp.sample_mask_in ||
-          nvc0->fragprog->fp.reads_framebuffer)
+      if (nvc0->fragprog && (
+                nvc0->fragprog->fp.sample_mask_in ||
+                nvc0->fragprog->fp.reads_framebuffer))
          samples = util_framebuffer_get_num_samples(&nvc0->framebuffer);
       samples |= NVC0_3D_SAMPLE_SHADING_ENABLE;
    }