netdev - Re: [PATCH net] ipv6: propagate ipv6_add_dev's error returns out of ipv6_find

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Message-Id: <20190823.145331.2056583913194843050.davem@davemloft.net>
Date:   Fri, 23 Aug 2019 14:53:31 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     sd@...asysnail.net
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv6: propagate ipv6_add_dev's error returns out
 of ipv6_find_idev

From: Sabrina Dubroca <sd@...asysnail.net>
Date: Fri, 23 Aug 2019 15:44:36 +0200

> Currently, ipv6_find_idev returns NULL when ipv6_add_dev fails,
> ignoring the specific error value. This results in addrconf_add_dev
> returning ENOBUFS in all cases, which is unfortunate in cases such as:
> 
>     # ip link add dummyX type dummy
>     # ip link set dummyX mtu 1200 up
>     # ip addr add 2000::/64 dev dummyX
>     RTNETLINK answers: No buffer space available
> 
> Commit a317a2f19da7 ("ipv6: fail early when creating netdev named all
> or default") introduced error returns in ipv6_add_dev. Before that,
> that function would simply return NULL for all failures.
> 
> Signed-off-by: Sabrina Dubroca <sd@...asysnail.net>

Looks good, applied, thanks Sabrina.