{
struct rfcomm_dlc *dlc = dev->dlc;
- /* The limit is bogus; the number of packets which can
- * currently be sent by the krfcommd thread has no relevance
- * to the number of packets which can be queued on the dlc's
- * tx queue.
- */
- int limit = dlc->mtu * (dlc->tx_credits?:1);
+ /* Limit the outstanding number of packets not yet sent to 40 */
+ int pending = 40 - atomic_read(&dev->wmem_alloc);
- return max(0, limit - atomic_read(&dev->wmem_alloc));
+ return max(0, pending) * dlc->mtu;
}
static void rfcomm_wfree(struct sk_buff *skb)
{
struct rfcomm_dev *dev = (void *) skb->sk;
- atomic_sub(skb->truesize, &dev->wmem_alloc);
+ atomic_dec(&dev->wmem_alloc);
if (test_bit(RFCOMM_TTY_ATTACHED, &dev->flags))
tty_port_tty_wakeup(&dev->port);
tty_port_put(&dev->port);
static void rfcomm_set_owner_w(struct sk_buff *skb, struct rfcomm_dev *dev)
{
tty_port_get(&dev->port);
- atomic_add(skb->truesize, &dev->wmem_alloc);
+ atomic_inc(&dev->wmem_alloc);
skb->sk = (void *) dev;
skb->destructor = rfcomm_wfree;
}