Re: [PATCH] Ensure IF_READY is unset when link is not ready

[David Miller <davem@davemloft.net>]

From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 08 Mar 2007 10:47:56 +1100

> Mitsuru Chinen <mitch@linux.vnet.ibm.com> wrote:
> > 
> > On linux-2.6.21-rc2 or later, IPv6 link-local address is not assigned to
> > some kind of interfaces during system start-up. (I found this issue
> > occures with e100, e1000 and tg3.)
> 
> Here is an alternative fix.
> 
> [IPV6]: Do not set IF_READY if device is down
> 
> Now that we add the IPv6 device at registration time we don't need
> to set IF_READY in ipv6_add_dev anymore because we will always get
> a NETDEV_UP event later on should the device ever become ready.
> 
> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Indeed, this looks like it will do the right thing.

And if you look into the history of the code in this area
I think you'll find that this snippet being removed existed
exactly because inet6_dev creation happened long after the
device was registered.