net: dsa: introduce dsa_towards_port helper

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Add a new helper returning the local port used to reach an arbitrary
switch port in the fabric.

Its only user at the moment is the dsa_upstream_port helper, which
returns the local port reaching the dedicated CPU port, but it will be
used in cross-chip FDB operations.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Vivien Didelot 2017-11-30 12:56:42 -05:00 • committed by David S. Miller

parent 5420683ae3

commit 3b8fac5d90

1 changed files with 13 additions and 10 deletions

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23

include/net/dsa.h

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