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can: only send bitrate data via netlink when available 

When setting the bitrate both can_calc_bittiming() and can_fixup_bittiming()
lead to the bitrate variable to be set, when a proper bit timing is available.
Only then the bitrate configuration is stored for the device, so checking for
priv->bittiming.bitrate is always sufficient.

Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Stephane Grosjean <s.grosjean@peak-system.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Oliver Hartkopp 2014-02-28 16:36:20 +01:00 committed by Marc Kleine-Budde
parent a94bc9c46e
commit b30749fdfb
1 changed files with 6 additions and 4 deletions
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10
drivers/net/can/dev.c
View File

@ -606,7 +606,7 @@ int open_candev(struct net_device *dev)
{
struct can_priv *priv = netdev_priv(dev);
if (!priv->bittiming.tq && !priv->bittiming.bitrate) {
if (!priv->bittiming.bitrate) {
netdev_err(dev, "bit-timing not yet defined\n");
return -EINVAL;
}
@ -719,7 +719,8 @@ static size_t can_get_size(const struct net_device *dev)
struct can_priv *priv = netdev_priv(dev);
size_t size = 0;
size += nla_total_size(sizeof(struct can_bittiming)); /* IFLA_CAN_BITTIMING */
if (priv->bittiming.bitrate) /* IFLA_CAN_BITTIMING */
size += nla_total_size(sizeof(struct can_bittiming));
if (priv->bittiming_const) /* IFLA_CAN_BITTIMING_CONST */
size += nla_total_size(sizeof(struct can_bittiming_const));
size += nla_total_size(sizeof(struct can_clock)); /* IFLA_CAN_CLOCK */
@ -741,8 +742,9 @@ static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
if (priv->do_get_state)
priv->do_get_state(dev, &state);
if (nla_put(skb, IFLA_CAN_BITTIMING,
sizeof(priv->bittiming), &priv->bittiming) ||
if ((priv->bittiming.bitrate &&
nla_put(skb, IFLA_CAN_BITTIMING,
sizeof(priv->bittiming), &priv->bittiming)) ||
(priv->bittiming_const &&
nla_put(skb, IFLA_CAN_BITTIMING_CONST,
sizeof(*priv->bittiming_const), priv->bittiming_const)) ||