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linux NCM网络接收数据

linux NCM网络相关代码位于driver/gadget/f_ncm.c u_ether.c u_ether.c中rx_submit()为接收函数，内核采用轮询方式接收数据，搞不明白内核是如何轮询，轮询时间，接收数据缓存大小，求教

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