radeonsi: fix crash while binding a NULL constant buffer

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c
index 7eac477..bdd41b4 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_state.c
+++ b/src/gallium/drivers/radeonsi/si_state.c
@@ -2491,7 +2491,7 @@ static void si_set_constant_buffer(struct pipe_context *ctx, uint shader, uint i
        /* Note that the state tracker can unbind constant buffers by
         * passing NULL here.
         */
-       if (cb == NULL)
+       if (cb == NULL || (!cb->buffer && !cb->user_buffer))
                return;
 
        pm4 = CALLOC_STRUCT(si_pm4_state);