static void megasas_release_mfi(struct megasas_instance *instance)
{
	u32 reply_q_sz = sizeof(u32) *(instance->max_mfi_cmds + 1);

	if (instance->reply_queue)
		dma_free_coherent(&instance->pdev->dev, reply_q_sz,
			    instance->reply_queue, instance->reply_queue_h);

	megasas_free_cmds(instance);

	iounmap(instance->reg_set);

	pci_release_selected_regions(instance->pdev, 1<<instance->bar);
}

The product dereferences a pointer that it expects to be valid but is NULL.