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ipv4: coding style: comparison for equality with NULL

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The ipv4 code uses a mixture of coding styles. In some instances check
for NULL pointer is done as x == NULL and sometimes as !x. !x is
preferred according to checkpatch and this patch makes the code
consistent by adopting the latter form.

No changes detected by objdiff.

Signed-off-by: Ian Morris <ipm@chirality.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ian Morris
2015-04-03 09:17:26 +01:00
committed by David S. Miller
parent 11a9c7821c
commit 51456b2914
39 changed files with 210 additions and 202 deletions
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26
net/ipv4/arp.c
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@@ -228,7 +228,7 @@ static int arp_constructor(struct neighbour *neigh)
rcu_read_lock();
in_dev = __in_dev_get_rcu(dev);
if (in_dev == NULL) {
if (!in_dev) {
rcu_read_unlock();
return -EINVAL;
}
@@ -475,7 +475,7 @@ static inline int arp_fwd_pvlan(struct in_device *in_dev,
*/
/*
* Create an arp packet. If (dest_hw == NULL), we create a broadcast
* Create an arp packet. If dest_hw is not set, we create a broadcast
* message.
*/
struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
@@ -495,7 +495,7 @@ struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
*/
skb = alloc_skb(arp_hdr_len(dev) + hlen + tlen, GFP_ATOMIC);
if (skb == NULL)
if (!skb)
return NULL;
skb_reserve(skb, hlen);
@@ -503,9 +503,9 @@ struct sk_buff *arp_create(int type, int ptype, __be32 dest_ip,
arp = (struct arphdr *) skb_put(skb, arp_hdr_len(dev));
skb->dev = dev;
skb->protocol = htons(ETH_P_ARP);
if (src_hw == NULL)
if (!src_hw)
src_hw = dev->dev_addr;
if (dest_hw == NULL)
if (!dest_hw)
dest_hw = dev->broadcast;
/*
@@ -614,7 +614,7 @@ void arp_send(int type, int ptype, __be32 dest_ip,
skb = arp_create(type, ptype, dest_ip, dev, src_ip,
dest_hw, src_hw, target_hw);
if (skb == NULL)
if (!skb)
return;
arp_xmit(skb);
@@ -644,7 +644,7 @@ static int arp_process(struct sk_buff *skb)
* is ARP'able.
*/
if (in_dev == NULL)
if (!in_dev)
goto out;
arp = arp_hdr(skb);
@@ -808,7 +808,7 @@ static int arp_process(struct sk_buff *skb)
is_garp = arp->ar_op == htons(ARPOP_REQUEST) && tip == sip &&
inet_addr_type(net, sip) == RTN_UNICAST;
if (n == NULL &&
if (!n &&
((arp->ar_op == htons(ARPOP_REPLY) &&
inet_addr_type(net, sip) == RTN_UNICAST) || is_garp))
n = __neigh_lookup(&arp_tbl, &sip, dev, 1);
@@ -900,7 +900,7 @@ out_of_mem:
static int arp_req_set_proxy(struct net *net, struct net_device *dev, int on)
{
if (dev == NULL) {
if (!dev) {
IPV4_DEVCONF_ALL(net, PROXY_ARP) = on;
return 0;
}
@@ -926,7 +926,7 @@ static int arp_req_set_public(struct net *net, struct arpreq *r,
return -ENODEV;
}
if (mask) {
if (pneigh_lookup(&arp_tbl, net, &ip, dev, 1) == NULL)
if (!pneigh_lookup(&arp_tbl, net, &ip, dev, 1))
return -ENOBUFS;
return 0;
}
@@ -947,7 +947,7 @@ static int arp_req_set(struct net *net, struct arpreq *r,
ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
if (r->arp_flags & ATF_PERM)
r->arp_flags |= ATF_COM;
if (dev == NULL) {
if (!dev) {
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
@@ -1067,7 +1067,7 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
return arp_req_delete_public(net, r, dev);
ip = ((struct sockaddr_in *)&r->arp_pa)->sin_addr.s_addr;
if (dev == NULL) {
if (!dev) {
struct rtable *rt = ip_route_output(net, ip, 0, RTO_ONLINK, 0);
if (IS_ERR(rt))
return PTR_ERR(rt);
@@ -1116,7 +1116,7 @@ int arp_ioctl(struct net *net, unsigned int cmd, void __user *arg)
if (r.arp_dev[0]) {
err = -ENODEV;
dev = __dev_get_by_name(net, r.arp_dev);
if (dev == NULL)
if (!dev)
goto out;
/* Mmmm... It is wrong... ARPHRD_NETROM==0 */