Пример #1
0
/* 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 */
}
Пример #2
0
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);	/*                    */
}