From: Christoph Hellwig Date: Tue, 3 Jan 2006 22:14:46 +0000 (-0800) Subject: [NETROM]: Remove unessecary lock_sock calls in netrom_ioctl() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5ff7630e4aa6c3969094dc30ff1cdaa6f52b0ed0;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git [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: Christoph Hellwig Signed-off-by: David S. Miller --- diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c index 05b653c05971..9ee672e19ec1 100644 --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -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; }