[Bridge] [PATCH net-next] net: bridge: avoid duplicate notification on up/down/change netdev events

[David Miller]

From: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
Date: Thu,  3 May 2018 13:47:24 +0300

> While handling netdevice events, br_device_event() sometimes uses
> br_stp_(disable|enable)_port which unconditionally send a notification,
> but then a second notification for the same event is sent at the end of
> the br_device_event() function. To avoid sending duplicate notifications
> in such cases, check if one has already been sent (i.e.
> br_stp_enable/disable_port have been called).
> The patch is based on a change by Satish Ashok.
> 
> Signed-off-by: Nikolay Aleksandrov <nikolay at cumulusnetworks.com>
> ---
> We've been running with a similar patch for over an year, it's been
> thoroughly tested. Sending for net-next since it's an improvement and
> not really a bug fix.

Looks good, applied, thanks!