nvfx: allow setting NULL constant buffers

diff --git a/src/gallium/drivers/nvfx/nvfx_state.c b/src/gallium/drivers/nvfx/nvfx_state.c
index b767846a99e57563379bf85f241dc32485ad1e0d..54619037d82844529e43718b3398c83c750e41c2 100644 (file)
--- a/src/gallium/drivers/nvfx/nvfx_state.c
+++ b/src/gallium/drivers/nvfx/nvfx_state.c
@@ -305,7 +305,7 @@ nvfx_set_constant_buffer(struct pipe_context *pipe, uint shader, uint index,
        struct nvfx_context *nvfx = nvfx_context(pipe);
 
        nvfx->constbuf[shader] = buf;
-       nvfx->constbuf_nr[shader] = buf->width0 / (4 * sizeof(float));
+       nvfx->constbuf_nr[shader] = buf ? (buf->width0 / (4 * sizeof(float))) : 0;
 
        if (shader == PIPE_SHADER_VERTEX) {
                nvfx->dirty |= NVFX_NEW_VERTCONST;