drm/amd/display: prevent setting cursor position with no surface

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

@@ -232,8 +232,8 @@ bool dc_stream_set_cursor_position(
 	for (i = 0; i < MAX_PIPES; i++) {
 		struct pipe_ctx *pipe_ctx = &res_ctx->pipe_ctx[i];
 
-		if ((pipe_ctx->stream == stream) &&
-				(pipe_ctx->ipp != NULL)) {
+		if (pipe_ctx->stream == stream &&
+				pipe_ctx->ipp && pipe_ctx->surface) {
 			struct input_pixel_processor *ipp = pipe_ctx->ipp;
 			struct dc_cursor_mi_param param = {
 				.pixel_clk_khz = dc_stream->timing.pix_clk_khz,