diff options
| author | Wolfgang Grandegger <wg@grandegger.com> | 2009-11-07 02:53:13 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-11-08 11:45:48 +0300 |
| commit | 53a0ef866dc379e577794819d0b8ade5ba338e3a (patch) | |
| tree | 250f93d5303cd788e09ee6032c416b5681ea2396 | |
| parent | 6755aebaaf9fc5416acfd4578ab7a1e122ecbc74 (diff) | |
| download | linux-53a0ef866dc379e577794819d0b8ade5ba338e3a.tar.xz | |
can: fix WARN_ON dump in net/core/rtnetlink.c:rtmsg_ifinfo()
On older kernels, e.g. 2.6.27, a WARN_ON dump in rtmsg_ifinfo()
is thrown when the CAN device is registered due to insufficient
skb space, as reported by various users. This patch adds the
rtnl_link_ops "get_size" to fix the problem. I think this patch
is required for more recent kernels as well, even if no WARN_ON
dumps are triggered. Maybe we also need "get_xstats_size" for
the CAN xstats.
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/can/dev.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/net/can/dev.c b/drivers/net/can/dev.c index f0b9a1e1db46..564e31c9fee4 100644 --- a/drivers/net/can/dev.c +++ b/drivers/net/can/dev.c @@ -589,6 +589,22 @@ static int can_changelink(struct net_device *dev, return 0; } +static size_t can_get_size(const struct net_device *dev) +{ + struct can_priv *priv = netdev_priv(dev); + size_t size; + + size = nla_total_size(sizeof(u32)); /* IFLA_CAN_STATE */ + size += sizeof(struct can_ctrlmode); /* IFLA_CAN_CTRLMODE */ + size += nla_total_size(sizeof(u32)); /* IFLA_CAN_RESTART_MS */ + size += sizeof(struct can_bittiming); /* IFLA_CAN_BITTIMING */ + size += sizeof(struct can_clock); /* IFLA_CAN_CLOCK */ + if (priv->bittiming_const) /* IFLA_CAN_BITTIMING_CONST */ + size += sizeof(struct can_bittiming_const); + + return size; +} + static int can_fill_info(struct sk_buff *skb, const struct net_device *dev) { struct can_priv *priv = netdev_priv(dev); @@ -639,6 +655,7 @@ static struct rtnl_link_ops can_link_ops __read_mostly = { .setup = can_setup, .newlink = can_newlink, .changelink = can_changelink, + .get_size = can_get_size, .fill_info = can_fill_info, .fill_xstats = can_fill_xstats, }; |