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Ethernet drivers should respect IFF_PROMISC rather than IFF_PPROMISC. The latter is for user-requested promisc mode, it implies the former but not vice versa. Some in-kernel components such as if_bridge(4) and bpf(4) will set promisc mode for interfaces on-demand. While here, update the debugging message to be not confusing. This was spotted while reviewing markj@ 's work D46524. Test from Franco shows that the interface seems to be unconditionally initialized to promisc mode regardless of this fix. That needs further investigation. Reviewed by: markj, Franco Fichtner <[email protected]> Tested by: Franco Fichtner <[email protected]> MFC after: 1 week Differential Revision: https://reviews.freebsd.org/D46794