From: Hangbin Liu <liuhang...@gmail.com>
Date: Wed, 17 Apr 2019 20:12:11 +0800
> If we add a bond device which is already the master of the team interface,
> we will hold the team->lock in team_add_slave() first and then request the
> lock in team_set_mac_address() again. The functions are called like:
>
> - team_add_slave()
> - team_port_add()
> - team_port_enter()
> - team_modeop_port_enter()
> - __set_port_dev_addr()
> - dev_set_mac_address()
> - bond_set_mac_address()
> - dev_set_mac_address()
> - team_set_mac_address
>
> Although team_upper_dev_link() would check the upper devices but it is
> called too late. Fix it by adding a checking before processing the slave.
>
> Fixes: 3d249d4ca7d0 ("net: introduce ethernet teaming device")
> Signed-off-by: Hangbin Liu <liuhang...@gmail.com>
Jiri, please review.
Thank you.
