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authorMarc Kleine-Budde <mkl@pengutronix.de>2018-10-08 09:02:40 +0200
committerMarc Kleine-Budde <mkl@pengutronix.de>2019-09-04 13:29:15 +0200
commitbdfb5765e45b86b599caf377a99826409f8403cb (patch)
tree21f259a9bcfbaceafccc68be9d8575e939e7db5f /net/can/af_can.c
parent8df9ffb888c021fa68f9075d545f2ec5eca37200 (diff)
downloadlinux-bdfb5765e45b86b599caf377a99826409f8403cb.tar.bz2
can: af_can: remove NULL-ptr checks from users of can_dev_rcv_lists_find()
Since using the "struct can_ml_priv" for the per device "struct dev_rcv_lists" the call can_dev_rcv_lists_find() cannot fail anymore. This patch simplifies af_can by removing the NULL pointer checks from the dev_rcv_lists returned by can_dev_rcv_lists_find(). Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de> Acked-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'net/can/af_can.c')
-rw-r--r--net/can/af_can.c45
1 files changed, 16 insertions, 29 deletions
diff --git a/net/can/af_can.c b/net/can/af_can.c
index 6ed85e2f72f0..25f0d510e1bf 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -462,28 +462,22 @@ int can_rx_register(struct net *net, struct net_device *dev, canid_t can_id,
spin_lock(&net->can.rcvlists_lock);
dev_rcv_lists = can_dev_rcv_lists_find(net, dev);
- if (dev_rcv_lists) {
- rcv_list = can_rcv_list_find(&can_id, &mask, dev_rcv_lists);
-
- rcv->can_id = can_id;
- rcv->mask = mask;
- rcv->matches = 0;
- rcv->func = func;
- rcv->data = data;
- rcv->ident = ident;
- rcv->sk = sk;
-
- hlist_add_head_rcu(&rcv->list, rcv_list);
- dev_rcv_lists->entries++;
-
- rcv_lists_stats->rcv_entries++;
- rcv_lists_stats->rcv_entries_max = max(rcv_lists_stats->rcv_entries_max,
- rcv_lists_stats->rcv_entries);
- } else {
- kmem_cache_free(rcv_cache, rcv);
- err = -ENODEV;
- }
+ rcv_list = can_rcv_list_find(&can_id, &mask, dev_rcv_lists);
+
+ rcv->can_id = can_id;
+ rcv->mask = mask;
+ rcv->matches = 0;
+ rcv->func = func;
+ rcv->data = data;
+ rcv->ident = ident;
+ rcv->sk = sk;
+ hlist_add_head_rcu(&rcv->list, rcv_list);
+ dev_rcv_lists->entries++;
+
+ rcv_lists_stats->rcv_entries++;
+ rcv_lists_stats->rcv_entries_max = max(rcv_lists_stats->rcv_entries_max,
+ rcv_lists_stats->rcv_entries);
spin_unlock(&net->can.rcvlists_lock);
return err;
@@ -530,12 +524,6 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id,
spin_lock(&net->can.rcvlists_lock);
dev_rcv_lists = can_dev_rcv_lists_find(net, dev);
- if (!dev_rcv_lists) {
- pr_err("BUG: receive list not found for dev %s, id %03X, mask %03X\n",
- DNAME(dev), can_id, mask);
- goto out;
- }
-
rcv_list = can_rcv_list_find(&can_id, &mask, dev_rcv_lists);
/* Search the receiver list for the item to delete. This should
@@ -668,8 +656,7 @@ static void can_receive(struct sk_buff *skb, struct net_device *dev)
/* find receive list for this device */
dev_rcv_lists = can_dev_rcv_lists_find(net, dev);
- if (dev_rcv_lists)
- matches += can_rcv_filter(dev_rcv_lists, skb);
+ matches += can_rcv_filter(dev_rcv_lists, skb);
rcu_read_unlock();