netdev - Re: [PATCH] ipv6: Add IN6_ADDR_GEN_MODE_STABLE_PRIVACY

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Date:   Wed, 20 May 2020 11:33:49 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     brambonne@...gle.com
Cc:     lorenzo@...gle.com, kuznet@....inr.ac.ru, yoshfuji@...ux-ipv6.org,
        kuba@...nel.org, hannes@...essinduktion.org,
        netdev@...r.kernel.org, jeffv@...gle.com, maze@...gle.com
Subject: Re: [PATCH] ipv6: Add IN6_ADDR_GEN_MODE_STABLE_PRIVACY_SOFTMAC mode

From: Bram Bonné <brambonne@...gle.com>
Date: Wed, 20 May 2020 15:16:53 +0200

> Trying to change the MAC when the device is up errors with EBUSY on my
> machines, so I was under the assumption that the device needs to be
> down to change the MAC. I could very well be wrong though.

Not all drivers/devices have this limitation, the generic code allows this
just fine.