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caif: Bugfix - Poll can't return POLLHUP while connecting. 

Discovered bug when testing async connect.
While connecting poll should not return POLLHUP,
but POLLOUT when connected.
Also fixed the sysfs flow-control-counters.

Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sjur Braendeland 2010-05-21 02:16:10 +00:00 committed by David S. Miller
parent 638e628a60
commit ca6a09f25c
1 changed files with 6 additions and 15 deletions
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21
net/caif/caif_socket.c
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@ -138,7 +138,7 @@ void caif_flow_ctrl(struct sock *sk, int mode)
{
struct caifsock *cf_sk;
cf_sk = container_of(sk, struct caifsock, sk);
if (cf_sk->layer.dn)
if (cf_sk->layer.dn && cf_sk->layer.dn->modemcmd)
cf_sk->layer.dn->modemcmd(cf_sk->layer.dn, mode);
}
@ -162,9 +162,8 @@ int caif_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
atomic_read(&cf_sk->sk.sk_rmem_alloc),
sk_rcvbuf_lowwater(cf_sk));
set_rx_flow_off(cf_sk);
if (cf_sk->layer.dn)
cf_sk->layer.dn->modemcmd(cf_sk->layer.dn,
CAIF_MODEMCMD_FLOW_OFF_REQ);
dbfs_atomic_inc(&cnt.num_rx_flow_off);
caif_flow_ctrl(sk, CAIF_MODEMCMD_FLOW_OFF_REQ);
}
err = sk_filter(sk, skb);
@ -175,9 +174,8 @@ int caif_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
trace_printk("CAIF: %s():"
" sending flow OFF due to rmem_schedule\n",
__func__);
if (cf_sk->layer.dn)
cf_sk->layer.dn->modemcmd(cf_sk->layer.dn,
CAIF_MODEMCMD_FLOW_OFF_REQ);
dbfs_atomic_inc(&cnt.num_rx_flow_off);
caif_flow_ctrl(sk, CAIF_MODEMCMD_FLOW_OFF_REQ);
}
skb->dev = NULL;
skb_set_owner_r(skb, sk);
@ -285,16 +283,13 @@ static void caif_check_flow_release(struct sock *sk)
{
struct caifsock *cf_sk = container_of(sk, struct caifsock, sk);
if (cf_sk->layer.dn == NULL || cf_sk->layer.dn->modemcmd == NULL)
return;
if (rx_flow_is_on(cf_sk))
return;
if (atomic_read(&sk->sk_rmem_alloc) <= sk_rcvbuf_lowwater(cf_sk)) {
dbfs_atomic_inc(&cnt.num_rx_flow_on);
set_rx_flow_on(cf_sk);
cf_sk->layer.dn->modemcmd(cf_sk->layer.dn,
CAIF_MODEMCMD_FLOW_ON_REQ);
caif_flow_ctrl(sk, CAIF_MODEMCMD_FLOW_ON_REQ);
}
}
/*
@ -1018,10 +1013,6 @@ static unsigned int caif_poll(struct file *file,
(sk->sk_shutdown & RCV_SHUTDOWN))
mask |= POLLIN | POLLRDNORM;
/* Connection-based need to check for termination and startup */
if (sk->sk_state == CAIF_DISCONNECTED)
mask |= POLLHUP;
/*
* we set writable also when the other side has shut down the
* connection. This prevents stuck sockets.