/* Encapsulate one IP datagram and stuff into a TTY queue. */
static void x25_asy_encaps(struct x25_asy *sl, unsigned char *icp, int len)
{
unsigned char *p;
int actual, count, mtu = sl->dev->mtu;
if (len > mtu) {
/* Sigh, shouldn't occur BUT ... */
len = mtu;
printk(KERN_DEBUG "%s: truncating oversized transmit packet!\n",
sl->dev->name);
sl->dev->stats.tx_dropped++;
x25_asy_unlock(sl);
return;
}
p = icp;
count = x25_asy_esc(p, sl->xbuff, len);
/* Order of next two lines is *very* important.
* When we are sending a little amount of data,
* the transfer may be completed inside driver.write()
* routine, because it's running with interrupts enabled.
* In this case we *never* got WRITE_WAKEUP event,
* if we did not request it before write operation.
* 14 Oct 1994 Dmitry Gorodchanin.
*/
set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
sl->xleft = count - actual;
sl->xhead = sl->xbuff + actual;
/* VSV */
clear_bit(SLF_OUTWAIT, &sl->flags); /* reset outfill flag */
}
static void x25_asy_encaps(struct x25_asy *sl, unsigned char *icp, int len)
{
unsigned char *p;
int actual, count, mtu = sl->dev->mtu;
if (len > mtu) {
/* */
len = mtu;
printk(KERN_DEBUG "%s: truncating oversized transmit packet!\n",
sl->dev->name);
sl->dev->stats.tx_dropped++;
x25_asy_unlock(sl);
return;
}
p = icp;
count = x25_asy_esc(p, (unsigned char *) sl->xbuff, len);
/*
*/
set_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
sl->xleft = count - actual;
sl->xhead = sl->xbuff + actual;
/* */
clear_bit(SLF_OUTWAIT, &sl->flags); /* */
}