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Date: Sun, 21 May 2017 22:16:21 +0200
From: SF Markus Elfring <elfring@...rs.sourceforge.net>
To: netdev@...r.kernel.org,
Augusto Mecking Caringi <augustocaringi@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Jarod Wilson <jarod@...hat.com>,
Javier Martinez Canillas <javier@....samsung.com>,
Kees Cook <keescook@...omium.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org
Subject: [PATCH 3/5] atm: Adjust 19 checks for null pointers
From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sun, 21 May 2017 21:34:23 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The script “checkpatch.pl” pointed information out like the following.
Comparison to NULL could be written …
Thus fix the affected source code places.
Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
net/atm/lec.c | 38 +++++++++++++++++++-------------------
1 file changed, 19 insertions(+), 19 deletions(-)
diff --git a/net/atm/lec.c b/net/atm/lec.c
index a11dbd3a5119..ca3aec0c0743 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -139,7 +139,7 @@ static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
struct atmlec_msg *mesg;
skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
- if (skb2 == NULL)
+ if (!skb2)
return;
skb2->len = sizeof(struct atmlec_msg);
mesg = (struct atmlec_msg *)skb2->data;
@@ -264,7 +264,7 @@ static netdev_tx_t lec_start_xmit(struct sk_buff *skb,
min_frame_size - skb->truesize,
GFP_ATOMIC);
dev_kfree_skb(skb);
- if (skb2 == NULL) {
+ if (!skb2) {
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
@@ -431,7 +431,7 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
pr_debug("%s: bridge zeppelin asks about %pM\n",
dev->name, mesg->content.proxy.mac_addr);
- if (br_fdb_test_addr_hook == NULL)
+ if (!br_fdb_test_addr_hook)
break;
if (br_fdb_test_addr_hook(dev, mesg->content.proxy.mac_addr)) {
@@ -442,7 +442,7 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
pr_debug("%s: entry found, responding to zeppelin\n",
dev->name);
skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
- if (skb2 == NULL)
+ if (!skb2)
break;
skb2->len = sizeof(struct atmlec_msg);
skb_copy_to_linear_data(skb2, mesg, sizeof(*mesg));
@@ -520,7 +520,7 @@ send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
mesg = (struct atmlec_msg *)skb->data;
memset(mesg, 0, sizeof(*mesg));
mesg->type = type;
- if (data != NULL)
+ if (data)
mesg->sizeoftlvs = data->len;
if (mac_addr)
ether_addr_copy(mesg->content.normal.mac_addr, mac_addr);
@@ -534,7 +534,7 @@ send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk);
- if (data != NULL) {
+ if (data) {
pr_debug("about to send %d bytes of data\n", data->len);
atm_force_charge(priv->lecd, data->truesize);
skb_queue_tail(&sk->sk_receive_queue, data);
@@ -663,7 +663,7 @@ static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
struct net_device *dev = skb->dev;
- if (vpriv == NULL) {
+ if (!vpriv) {
pr_info("vpriv = NULL!?!?!?\n");
return;
}
@@ -1066,7 +1066,7 @@ static void __exit lane_module_cleanup(void)
deregister_atm_ioctl(&lane_ioctl_ops);
for (i = 0; i < MAX_LEC_ITF; i++) {
- if (dev_lec[i] != NULL) {
+ if (dev_lec[i]) {
unregister_netdev(dev_lec[i]);
free_netdev(dev_lec[i]);
dev_lec[i] = NULL;
@@ -1097,11 +1097,11 @@ static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
spin_lock_irqsave(&priv->lec_arp_lock, flags);
table = lec_arp_find(priv, dst_mac);
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
- if (table == NULL)
+ if (!table)
return -1;
*tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC);
- if (*tlvs == NULL)
+ if (!*tlvs)
return -1;
*sizeoftlvs = table->sizeoftlvs;
@@ -1109,12 +1109,12 @@ static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force,
return 0;
}
- if (sizeoftlvs == NULL)
+ if (!sizeoftlvs)
retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
else {
skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
- if (skb == NULL)
+ if (!skb)
return -1;
skb->len = *sizeoftlvs;
skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs);
@@ -1143,12 +1143,12 @@ static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst,
kfree(priv->tlvs); /* NULL if there was no previous association */
priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
- if (priv->tlvs == NULL)
+ if (!priv->tlvs)
return 0;
priv->sizeoftlvs = sizeoftlvs;
skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
- if (skb == NULL)
+ if (!skb)
return 0;
skb->len = sizeoftlvs;
skb_copy_to_linear_data(skb, tlvs, sizeoftlvs);
@@ -1181,13 +1181,13 @@ static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr,
*/
struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
- if (entry == NULL)
+ if (!entry)
return; /* should not happen */
kfree(entry->tlvs);
entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL);
- if (entry->tlvs == NULL)
+ if (!entry->tlvs)
return;
entry->sizeoftlvs = sizeoftlvs;
#endif
@@ -1854,7 +1854,7 @@ lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr,
spin_lock_irqsave(&priv->lec_arp_lock, flags);
entry = lec_arp_find(priv, mac_addr);
- if (entry == NULL && targetless_le_arp)
+ if (!entry && targetless_le_arp)
goto out; /*
* LANE2: ignore targetless LE_ARPs for which
* we have no entry in the cache. 7.1.30
@@ -1965,7 +1965,7 @@ lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
entry->old_recv_push = old_push;
#endif
entry = make_entry(priv, bus_mac);
- if (entry == NULL)
+ if (!entry)
goto out;
del_timer(&entry->timer);
memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
@@ -1990,7 +1990,7 @@ lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data,
ioc_data->atm_addr[16], ioc_data->atm_addr[17],
ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
entry = make_entry(priv, bus_mac);
- if (entry == NULL)
+ if (!entry)
goto out;
memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
eth_zero_addr(entry->mac_addr);
--
2.13.0
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