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mlxsw: spectrum_router: Use the available router pointer for netevent…
… handling This code handles NETEVENT_DELAY_PROBE_TIME_UPDATE, which is invoked every time the delay_probe_time changes. mlxsw router currently only maintains one timer, so the last delay_probe_time set wins. Currently, mlxsw uses mlxsw_sp_port_lower_dev_hold() to find a reference to the router. This is no longer necessary. But as a side effect, this makes sure that only updates to "interesting netdevices" (ones that have a physical netdevice lower) are projected. Retain that side effect by calling mlxsw_sp_port_dev_lower_find_rcu() and punting if there is none. Then just proceed using the router pointer that's already at hand in the helper. Note that previously, the code took and put a reference of the netdevice. Because the mlxsw_sp pointer is now obtained from the notifier block, the port pointer (non-) NULL-ness is all that's relevant, and the reference does not need to be taken anymore. Signed-off-by: Petr Machata <[email protected]> Reviewed-by: Amit Cohen <[email protected]> Reviewed-by: Simon Horman <[email protected]> Signed-off-by: David S. Miller <[email protected]>
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