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用6472的SRIO做loopback测试，每次都会出现Error: SRIO Write has a completion code of 5。查了一下，LSU的completion code：101b代表DMA transfer error。
这是为什么呢？是需要对DMA做什么初始化的工作吗？SRIO用到的DMA不是自动初始化吗？还有之前还有一个帖子没有人解答，麻烦专家了。谢谢！
如果能有双6472SRIO通信的例程就好了，谢谢
