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Diffstat (limited to 'net/can/bcm.c')
-rw-r--r--net/can/bcm.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/net/can/bcm.c b/net/can/bcm.c
index 0e5c37be4a2b..909b9e684e04 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -86,6 +86,8 @@ MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Oliver Hartkopp <oliver.hartkopp@volkswagen.de>");
MODULE_ALIAS("can-proto-2");
+#define BCM_MIN_NAMELEN CAN_REQUIRED_SIZE(struct sockaddr_can, can_ifindex)
+
/*
* easy access to the first 64 bit of can(fd)_frame payload. cp->data is
* 64 bit aligned so the offset has to be multiples of 8 which is ensured
@@ -1292,7 +1294,7 @@ static int bcm_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
/* no bound device as default => check msg_name */
DECLARE_SOCKADDR(struct sockaddr_can *, addr, msg->msg_name);
- if (msg->msg_namelen < CAN_REQUIRED_SIZE(*addr, can_ifindex))
+ if (msg->msg_namelen < BCM_MIN_NAMELEN)
return -EINVAL;
if (addr->can_family != AF_CAN)
@@ -1534,7 +1536,7 @@ static int bcm_connect(struct socket *sock, struct sockaddr *uaddr, int len,
struct net *net = sock_net(sk);
int ret = 0;
- if (len < CAN_REQUIRED_SIZE(*addr, can_ifindex))
+ if (len < BCM_MIN_NAMELEN)
return -EINVAL;
lock_sock(sk);
@@ -1616,8 +1618,8 @@ static int bcm_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
sock_recv_ts_and_drops(msg, sk, skb);
if (msg->msg_name) {
- __sockaddr_check_size(sizeof(struct sockaddr_can));
- msg->msg_namelen = sizeof(struct sockaddr_can);
+ __sockaddr_check_size(BCM_MIN_NAMELEN);
+ msg->msg_namelen = BCM_MIN_NAMELEN;
memcpy(msg->msg_name, skb->cb, msg->msg_namelen);
}