From 993e6f2fd487e2acddd711f79cf48f3420731382 Mon Sep 17 00:00:00 2001 From: Oliver Hartkopp Date: Tue, 11 Aug 2009 02:41:24 +0000 Subject: [PATCH] can: fix oops caused by wrong rtnl newlink usage For 'real' hardware CAN devices the netlink interface is used to set CAN specific communication parameters. Real CAN hardware can not be created with the ip tool ... The invocation of 'ip link add type can' lead to an oops as the standard rtnl newlink function was called: http://bugzilla.kernel.org/show_bug.cgi?id=13954 This patch adds a private newlink function for the CAN device driver interface that unconditionally returns -EOPNOTSUPP. Signed-off-by: Oliver Hartkopp Reported-by: Dmitry Eremin-Solenikov CC: Patrick McHardy CC: Wolfgang Grandegger Signed-off-by: David S. Miller --- drivers/net/can/dev.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index 9e4283aff828..e1a4f8214239 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -611,11 +611,18 @@ static int can_fill_xstats(struct sk_buff *skb, const struct net_device *dev) return -EMSGSIZE; } +static int can_newlink(struct net_device *dev, + struct nlattr *tb[], struct nlattr *data[]) +{ + return -EOPNOTSUPP; +} + static struct rtnl_link_ops can_link_ops __read_mostly = { .kind = "can", .maxtype = IFLA_CAN_MAX, .policy = can_policy, .setup = can_setup, + .newlink = can_newlink, .changelink = can_changelink, .fill_info = can_fill_info, .fill_xstats = can_fill_xstats,