Tobias Waldekranz cc76ce9e8d
net: dsa: Add helper to resolve bridge port from DSA port ...
In order for a driver to be able to query a bridge for information
about itself, e.g. reading out port flags, it has to use a netdev that
is known to the bridge. In the simple case, that is just the netdev
representing the port, e.g. swp0 or swp1 in this example:
br0
/ \
swp0 swp1
But in the case of an offloaded lag, this will be the bond or team
interface, e.g. bond0 in this example:
br0
/
bond0
/ \
swp0 swp1
Add a helper that hides some of this complexity from the
drivers. Then, redefine dsa_port_offloads_bridge_port using the helper
to avoid double accounting of the set of possible offloaded uppers.
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com >
Reviewed-by: Vladimir Oltean <olteanv@gmail.com >
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com >
Signed-off-by: David S. Miller <davem@davemloft.net >
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cc76ce9e8d