SK_WAIT_DATA(9)

NAME
sk_wait_data - wait for data to arrive at sk_receive_queue

SYNOPSIS

int sk_wait_data(struct sock * sk, long * timeo, const struct sk_buff * skb);

ARGUMENTS

sk
    sock to wait on

timeo
    for how long

skb
    last skb seen on sk_receive_queue

DESCRIPTION

Now socket state including sk->sk_err is changed only under lock, hence we may omit checks after joining wait queue. We check receive queue before schedule only as optimization; it is very likely that release_sock added new data.

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