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The Xeon NTB-RP setup, the transparent side does not get a link up/down interrupt. Since the presence of a NTB device on the transparent side means that we have a NTB link up, we can work around the lack of an interrupt by simply calling the link up function to notify the upper layers. Authored by: Jon Mason Obtained from: Linux (Dual BSD/GPL driver) Sponsored by: EMC / Isilon Storage Division