can: af_can: give variable holding the CAN per device receive lists a sensible name

This patch gives the variables holding the CAN receive filter lists a
better name by renaming them from "d" to "dev_rcv_lists".

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>

diff --git a/net/can/af_can.c b/net/can/af_can.c
index 62b3f2d..0d51c06 100644 (file)
--- a/net/can/af_can.c
+++ b/net/can/af_can.c
@@ -358,7 +358,7 @@ static unsigned int effhash(canid_t can_id)
  *  Reduced can_id to have a preprocessed filter compare value.
  */
 static struct hlist_head *find_rcv_list(canid_t *can_id, canid_t *mask,
-                                       struct can_dev_rcv_lists *d)
+                                       struct can_dev_rcv_lists *dev_rcv_lists)
 {
        canid_t inv = *can_id & CAN_INV_FILTER; /* save flag before masking */
 
@@ -366,7 +366,7 @@ static struct hlist_head *find_rcv_list(canid_t *can_id, canid_t *mask,
        if (*mask & CAN_ERR_FLAG) {
                /* clear CAN_ERR_FLAG in filter entry */
                *mask &= CAN_ERR_MASK;
-               return &d->rx[RX_ERR];
+               return &dev_rcv_lists->rx[RX_ERR];
        }
 
        /* with cleared CAN_ERR_FLAG we have a simple mask/value filterpair */
@@ -382,26 +382,26 @@ static struct hlist_head *find_rcv_list(canid_t *can_id, canid_t *mask,
 
        /* inverse can_id/can_mask filter */
        if (inv)
-               return &d->rx[RX_INV];
+               return &dev_rcv_lists->rx[RX_INV];
 
        /* mask == 0 => no condition testing at receive time */
        if (!(*mask))
-               return &d->rx[RX_ALL];
+               return &dev_rcv_lists->rx[RX_ALL];
 
        /* extra filterlists for the subscription of a single non-RTR can_id */
        if (((*mask & CAN_EFF_RTR_FLAGS) == CAN_EFF_RTR_FLAGS) &&
            !(*can_id & CAN_RTR_FLAG)) {
                if (*can_id & CAN_EFF_FLAG) {
                        if (*mask == (CAN_EFF_MASK | CAN_EFF_RTR_FLAGS))
-                               return &d->rx_eff[effhash(*can_id)];
+                               return &dev_rcv_lists->rx_eff[effhash(*can_id)];
                } else {
                        if (*mask == (CAN_SFF_MASK | CAN_EFF_RTR_FLAGS))
-                               return &d->rx_sff[*can_id];
+                               return &dev_rcv_lists->rx_sff[*can_id];
                }
        }
 
        /* default: filter via can_id/can_mask */
-       return &d->rx[RX_FIL];
+       return &dev_rcv_lists->rx[RX_FIL];
 }
 
 /**
@@ -440,7 +440,7 @@ int can_rx_register(struct net *net, struct net_device *dev, canid_t can_id,
 {
        struct receiver *r;
        struct hlist_head *rl;
-       struct can_dev_rcv_lists *d;
+       struct can_dev_rcv_lists *dev_rcv_lists;
        struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
        int err = 0;
 
@@ -458,9 +458,9 @@ int can_rx_register(struct net *net, struct net_device *dev, canid_t can_id,
 
        spin_lock(&net->can.rcvlists_lock);
 
-       d = find_dev_rcv_lists(net, dev);
-       if (d) {
-               rl = find_rcv_list(&can_id, &mask, d);
+       dev_rcv_lists = find_dev_rcv_lists(net, dev);
+       if (dev_rcv_lists) {
+               rl = find_rcv_list(&can_id, &mask, dev_rcv_lists);
 
                r->can_id  = can_id;
                r->mask    = mask;
@@ -471,7 +471,7 @@ int can_rx_register(struct net *net, struct net_device *dev, canid_t can_id,
                r->sk      = sk;
 
                hlist_add_head_rcu(&r->list, rl);
-               d->entries++;
+               dev_rcv_lists->entries++;
 
                rcv_lists_stats->rcv_entries++;
                if (rcv_lists_stats->rcv_entries_max < rcv_lists_stats->rcv_entries)
@@ -516,7 +516,7 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id,
        struct receiver *r = NULL;
        struct hlist_head *rl;
        struct can_rcv_lists_stats *rcv_lists_stats = net->can.rcv_lists_stats;
-       struct can_dev_rcv_lists *d;
+       struct can_dev_rcv_lists *dev_rcv_lists;
 
        if (dev && dev->type != ARPHRD_CAN)
                return;
@@ -526,20 +526,19 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id,
 
        spin_lock(&net->can.rcvlists_lock);
 
-       d = find_dev_rcv_lists(net, dev);
-       if (!d) {
+       dev_rcv_lists = find_dev_rcv_lists(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;
        }
 
-       rl = find_rcv_list(&can_id, &mask, d);
+       rl = find_rcv_list(&can_id, &mask, dev_rcv_lists);
 
        /* Search the receiver list for the item to delete.  This should
         * exist, since no receiver may be unregistered that hasn't
         * been registered before.
         */
-
        hlist_for_each_entry_rcu(r, rl, list) {
                if (r->can_id == can_id && r->mask == mask &&
                    r->func == func && r->data == data)
@@ -557,14 +556,14 @@ void can_rx_unregister(struct net *net, struct net_device *dev, canid_t can_id,
        }
 
        hlist_del_rcu(&r->list);
-       d->entries--;
+       dev_rcv_lists->entries--;
 
        if (rcv_lists_stats->rcv_entries > 0)
                rcv_lists_stats->rcv_entries--;
 
        /* remove device structure requested by NETDEV_UNREGISTER */
-       if (d->remove_on_zero_entries && !d->entries) {
-               kfree(d);
+       if (dev_rcv_lists->remove_on_zero_entries && !dev_rcv_lists->entries) {
+               kfree(dev_rcv_lists);
                dev->ml_priv = NULL;
        }
 
@@ -586,19 +585,19 @@ static inline void deliver(struct sk_buff *skb, struct receiver *r)
        r->matches++;
 }
 
-static int can_rcv_filter(struct can_dev_rcv_lists *d, struct sk_buff *skb)
+static int can_rcv_filter(struct can_dev_rcv_lists *dev_rcv_lists, struct sk_buff *skb)
 {
        struct receiver *r;
        int matches = 0;
        struct can_frame *cf = (struct can_frame *)skb->data;
        canid_t can_id = cf->can_id;
 
-       if (d->entries == 0)
+       if (dev_rcv_lists->entries == 0)
                return 0;
 
        if (can_id & CAN_ERR_FLAG) {
                /* check for error message frame entries only */
-               hlist_for_each_entry_rcu(r, &d->rx[RX_ERR], list) {
+               hlist_for_each_entry_rcu(r, &dev_rcv_lists->rx[RX_ERR], list) {
                        if (can_id & r->mask) {
                                deliver(skb, r);
                                matches++;
@@ -608,13 +607,13 @@ static int can_rcv_filter(struct can_dev_rcv_lists *d, struct sk_buff *skb)
        }
 
        /* check for unfiltered entries */
-       hlist_for_each_entry_rcu(r, &d->rx[RX_ALL], list) {
+       hlist_for_each_entry_rcu(r, &dev_rcv_lists->rx[RX_ALL], list) {
                deliver(skb, r);
                matches++;
        }
 
        /* check for can_id/mask entries */
-       hlist_for_each_entry_rcu(r, &d->rx[RX_FIL], list) {
+       hlist_for_each_entry_rcu(r, &dev_rcv_lists->rx[RX_FIL], list) {
                if ((can_id & r->mask) == r->can_id) {
                        deliver(skb, r);
                        matches++;
@@ -622,7 +621,7 @@ static int can_rcv_filter(struct can_dev_rcv_lists *d, struct sk_buff *skb)
        }
 
        /* check for inverted can_id/mask entries */
-       hlist_for_each_entry_rcu(r, &d->rx[RX_INV], list) {
+       hlist_for_each_entry_rcu(r, &dev_rcv_lists->rx[RX_INV], list) {
                if ((can_id & r->mask) != r->can_id) {
                        deliver(skb, r);
                        matches++;
@@ -634,7 +633,7 @@ static int can_rcv_filter(struct can_dev_rcv_lists *d, struct sk_buff *skb)
                return matches;
 
        if (can_id & CAN_EFF_FLAG) {
-               hlist_for_each_entry_rcu(r, &d->rx_eff[effhash(can_id)], list) {
+               hlist_for_each_entry_rcu(r, &dev_rcv_lists->rx_eff[effhash(can_id)], list) {
                        if (r->can_id == can_id) {
                                deliver(skb, r);
                                matches++;
@@ -642,7 +641,7 @@ static int can_rcv_filter(struct can_dev_rcv_lists *d, struct sk_buff *skb)
                }
        } else {
                can_id &= CAN_SFF_MASK;
-               hlist_for_each_entry_rcu(r, &d->rx_sff[can_id], list) {
+               hlist_for_each_entry_rcu(r, &dev_rcv_lists->rx_sff[can_id], list) {
                        deliver(skb, r);
                        matches++;
                }
@@ -653,7 +652,7 @@ static int can_rcv_filter(struct can_dev_rcv_lists *d, struct sk_buff *skb)
 
 static void can_receive(struct sk_buff *skb, struct net_device *dev)
 {
-       struct can_dev_rcv_lists *d;
+       struct can_dev_rcv_lists *dev_rcv_lists;
        struct net *net = dev_net(dev);
        struct can_pkg_stats *pkg_stats = net->can.pkg_stats;
        int matches;
@@ -672,9 +671,9 @@ static void can_receive(struct sk_buff *skb, struct net_device *dev)
        matches = can_rcv_filter(net->can.rx_alldev_list, skb);
 
        /* find receive list for this device */
-       d = find_dev_rcv_lists(net, dev);
-       if (d)
-               matches += can_rcv_filter(d, skb);
+       dev_rcv_lists = find_dev_rcv_lists(net, dev);
+       if (dev_rcv_lists)
+               matches += can_rcv_filter(dev_rcv_lists, skb);
 
        rcu_read_unlock();
 
@@ -789,7 +788,7 @@ static int can_notifier(struct notifier_block *nb, unsigned long msg,
                        void *ptr)
 {
        struct net_device *dev = netdev_notifier_info_to_dev(ptr);
-       struct can_dev_rcv_lists *d;
+       struct can_dev_rcv_lists *dev_rcv_lists;
 
        if (dev->type != ARPHRD_CAN)
                return NOTIFY_DONE;
@@ -798,23 +797,23 @@ static int can_notifier(struct notifier_block *nb, unsigned long msg,
        case NETDEV_REGISTER:
 
                /* create new dev_rcv_lists for this device */
-               d = kzalloc(sizeof(*d), GFP_KERNEL);
-               if (!d)
+               dev_rcv_lists = kzalloc(sizeof(*dev_rcv_lists), GFP_KERNEL);
+               if (!dev_rcv_lists)
                        return NOTIFY_DONE;
                BUG_ON(dev->ml_priv);
-               dev->ml_priv = d;
+               dev->ml_priv = dev_rcv_lists;
 
                break;
 
        case NETDEV_UNREGISTER:
                spin_lock(&dev_net(dev)->can.rcvlists_lock);
 
-               d = dev->ml_priv;
-               if (d) {
-                       if (d->entries) {
-                               d->remove_on_zero_entries = 1;
-                       } else {
-                               kfree(d);
+               dev_rcv_lists = dev->ml_priv;
+               if (dev_rcv_lists) {
+                       if (dev_rcv_lists->entries)
+                               dev_rcv_lists->remove_on_zero_entries = 1;
+                       else {
+                               kfree(dev_rcv_lists);
                                dev->ml_priv = NULL;
                        }
                } else {
@@ -880,10 +879,10 @@ static void can_pernet_exit(struct net *net)
        rcu_read_lock();
        for_each_netdev_rcu(net, dev) {
                if (dev->type == ARPHRD_CAN && dev->ml_priv) {
-                       struct can_dev_rcv_lists *d = dev->ml_priv;
+                       struct can_dev_rcv_lists *dev_rcv_lists = dev->ml_priv;
 
-                       BUG_ON(d->entries);
-                       kfree(d);
+                       BUG_ON(dev_rcv_lists->entries);
+                       kfree(dev_rcv_lists);
                        dev->ml_priv = NULL;
                }
        }