Hi, Unfortunately I don't have time to look into this right now. But this problem really reminds of a problem in 2010 we had with the FEC driver that was also related to early network traffic causing the kernel to hang. The commit in git to fix it is: 03c698c93fc15d976738a853a7ccb6ea26396003 Perhaps this is the same problem in a different costume. John Ogness -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html