Commit 5ff7630e authored by Christoph Hellwig's avatar Christoph Hellwig Committed by David S. Miller
Browse files

[NETROM]: Remove unessecary lock_sock calls in netrom_ioctl() 



lock_sock is needed only in very few cases, so do it there instead of
around the switch statement.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b461d2f2

net/netrom/af_netrom.c

+5 −5
Original line number Diff line number Diff line
@@ -1166,10 +1166,11 @@ static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 
	void __user *argp = (void __user *)arg;

	int ret;



	lock_sock(sk);

	switch (cmd) {

	case TIOCOUTQ: {

		long amount;



		lock_sock(sk);

		amount = sk->sk_sndbuf - atomic_read(&sk->sk_wmem_alloc);

		if (amount < 0)

			amount = 0;
@@ -1180,6 +1181,8 @@ static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 
	case TIOCINQ: {

		struct sk_buff *skb;

		long amount = 0L;



		lock_sock(sk);

		/* These two are safe on a single CPU system as only user tasks fiddle here */

		if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)

			amount = skb->len;
@@ -1188,6 +1191,7 @@ static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 
	}



	case SIOCGSTAMP:

		lock_sock(sk);

		ret = sock_get_timestamp(sk, argp);

		release_sock(sk);

		return ret;
@@ -1202,21 +1206,17 @@ static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) 
	case SIOCSIFNETMASK:

	case SIOCGIFMETRIC:

	case SIOCSIFMETRIC:

		release_sock(sk);

		return -EINVAL;



	case SIOCADDRT:

	case SIOCDELRT:

	case SIOCNRDECOBS:

		release_sock(sk);

		if (!capable(CAP_NET_ADMIN)) return -EPERM;

		return nr_rt_ioctl(cmd, argp);



	default:

		release_sock(sk);

		return dev_ioctl(cmd, argp);

	}

	release_sock(sk);



	return 0;

}