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Looking at the code, the GSWIP switch appears to hold bridging service
structures (VLANs, FDBs, forwarding rules) in PCE table entries.
Hardware access to the PCE table is non-atomic, and is comprised of
several register reads and writes.
These accesses are currently serialized by the rtnl_lock, but DSA is
changing its driver API and that lock will no longer be held when
calling ->port_fdb_add() and ->port_fdb_del().
So this driver needs to serialize the access to the PCE table using its
own locking scheme. This patch adds that.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
49753a75b9