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[IrDA] af_irda: irda_recvmsg_stream cleanup 

This patch cleans up some code in irda_recvmsg_stream, replacing some
homebrew code with prepare_to_wait/finish_wait, and by making the
code honor sock_rcvtimeo.

Signed-off-by: Olaf Kirch <olaf.kirch@oracle.com>
Signed-off-by: Samuel Ortiz <samuel@sortiz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Olaf Kirch 2007-04-20 22:05:27 -07:00 коммит произвёл David S. Miller
Родитель 9958089a43
Коммит 305f2aa182
1 изменённых файлов: 13 добавлений и 18 удалений
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31
net/irda/af_irda.c
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@ -1402,8 +1402,8 @@ static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
struct irda_sock *self = irda_sk(sk);
int noblock = flags & MSG_DONTWAIT;
size_t copied = 0;
int target = 1;
DECLARE_WAITQUEUE(waitq, current);
int target;
long timeo;
IRDA_DEBUG(3, "%s()\n", __FUNCTION__);
@ -1416,8 +1416,8 @@ static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
if (flags & MSG_OOB)
return -EOPNOTSUPP;
if (flags & MSG_WAITALL)
target = size;
target = sock_rcvlowat(sk, flags & MSG_WAITALL, size);
timeo = sock_rcvtimeo(sk, noblock);
msg->msg_namelen = 0;
@ -1425,19 +1425,14 @@ static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
int chunk;
struct sk_buff *skb = skb_dequeue(&sk->sk_receive_queue);
if (skb==NULL) {
if (skb == NULL) {
DEFINE_WAIT(wait);
int ret = 0;
if (copied >= target)
break;
/* The following code is a cut'n'paste of the
* wait_event_interruptible() macro.
* We don't us the macro because the test condition
* is messy. - Jean II */
set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
add_wait_queue(sk->sk_sleep, &waitq);
set_current_state(TASK_INTERRUPTIBLE);
prepare_to_wait_exclusive(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
/*
* POSIX 1003.1g mandates this order.
@ -1450,17 +1445,17 @@ static int irda_recvmsg_stream(struct kiocb *iocb, struct socket *sock,
else if (noblock)
ret = -EAGAIN;
else if (signal_pending(current))
ret = -ERESTARTSYS;
ret = sock_intr_errno(timeo);
else if (sk->sk_state != TCP_ESTABLISHED)
ret = -ENOTCONN;
else if (skb_peek(&sk->sk_receive_queue) == NULL)
/* Wait process until data arrives */
schedule();
current->state = TASK_RUNNING;
remove_wait_queue(sk->sk_sleep, &waitq);
clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
finish_wait(sk->sk_sleep, &wait);
if(ret)
return(ret);
if (ret)
return ret;
if (sk->sk_shutdown & RCV_SHUTDOWN)
break;