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-rw-r--r--drivers/net/wan/x25_asy.c836
1 files changed, 0 insertions, 836 deletions
diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
deleted file mode 100644
index 54b1a5aee82d..000000000000
--- a/drivers/net/wan/x25_asy.c
+++ /dev/null
@@ -1,836 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Things to sort out:
- *
- * o tbusy handling
- * o allow users to set the parameters
- * o sync/async switching ?
- *
- * Note: This does _not_ implement CCITT X.25 asynchronous framing
- * recommendations. Its primarily for testing purposes. If you wanted
- * to do CCITT then in theory all you need is to nick the HDLC async
- * checksum routines from ppp.c
- * Changes:
- *
- * 2000-10-29 Henner Eisen lapb_data_indication() return status.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-
-#include <linux/uaccess.h>
-#include <linux/bitops.h>
-#include <linux/string.h>
-#include <linux/mm.h>
-#include <linux/interrupt.h>
-#include <linux/in.h>
-#include <linux/tty.h>
-#include <linux/errno.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/if_arp.h>
-#include <linux/lapb.h>
-#include <linux/init.h>
-#include <linux/rtnetlink.h>
-#include <linux/slab.h>
-#include <net/x25device.h>
-#include "x25_asy.h"
-
-static struct net_device **x25_asy_devs;
-static int x25_asy_maxdev = SL_NRUNIT;
-
-module_param(x25_asy_maxdev, int, 0);
-MODULE_LICENSE("GPL");
-
-static int x25_asy_esc(unsigned char *p, unsigned char *d, int len);
-static void x25_asy_unesc(struct x25_asy *sl, unsigned char c);
-static void x25_asy_setup(struct net_device *dev);
-
-/* Find a free X.25 channel, and link in this `tty' line. */
-static struct x25_asy *x25_asy_alloc(void)
-{
- struct net_device *dev = NULL;
- struct x25_asy *sl;
- int i;
-
- if (x25_asy_devs == NULL)
- return NULL; /* Master array missing ! */
-
- for (i = 0; i < x25_asy_maxdev; i++) {
- dev = x25_asy_devs[i];
-
- /* Not allocated ? */
- if (dev == NULL)
- break;
-
- sl = netdev_priv(dev);
- /* Not in use ? */
- if (!test_and_set_bit(SLF_INUSE, &sl->flags))
- return sl;
- }
-
-
- /* Sorry, too many, all slots in use */
- if (i >= x25_asy_maxdev)
- return NULL;
-
- /* If no channels are available, allocate one */
- if (!dev) {
- char name[IFNAMSIZ];
- sprintf(name, "x25asy%d", i);
-
- dev = alloc_netdev(sizeof(struct x25_asy), name,
- NET_NAME_UNKNOWN, x25_asy_setup);
- if (!dev)
- return NULL;
-
- /* Initialize channel control data */
- sl = netdev_priv(dev);
- dev->base_addr = i;
-
- /* register device so that it can be ifconfig'ed */
- if (register_netdev(dev) == 0) {
- /* (Re-)Set the INUSE bit. Very Important! */
- set_bit(SLF_INUSE, &sl->flags);
- x25_asy_devs[i] = dev;
- return sl;
- } else {
- pr_warn("%s(): register_netdev() failure\n", __func__);
- free_netdev(dev);
- }
- }
- return NULL;
-}
-
-
-/* Free an X.25 channel. */
-static void x25_asy_free(struct x25_asy *sl)
-{
- /* Free all X.25 frame buffers. */
- kfree(sl->rbuff);
- sl->rbuff = NULL;
- kfree(sl->xbuff);
- sl->xbuff = NULL;
-
- if (!test_and_clear_bit(SLF_INUSE, &sl->flags))
- netdev_err(sl->dev, "x25_asy_free for already free unit\n");
-}
-
-static int x25_asy_change_mtu(struct net_device *dev, int newmtu)
-{
- struct x25_asy *sl = netdev_priv(dev);
- unsigned char *xbuff, *rbuff;
- int len;
-
- len = 2 * newmtu;
- xbuff = kmalloc(len + 4, GFP_ATOMIC);
- rbuff = kmalloc(len + 4, GFP_ATOMIC);
-
- if (xbuff == NULL || rbuff == NULL) {
- kfree(xbuff);
- kfree(rbuff);
- return -ENOMEM;
- }
-
- spin_lock_bh(&sl->lock);
- xbuff = xchg(&sl->xbuff, xbuff);
- if (sl->xleft) {
- if (sl->xleft <= len) {
- memcpy(sl->xbuff, sl->xhead, sl->xleft);
- } else {
- sl->xleft = 0;
- dev->stats.tx_dropped++;
- }
- }
- sl->xhead = sl->xbuff;
-
- rbuff = xchg(&sl->rbuff, rbuff);
- if (sl->rcount) {
- if (sl->rcount <= len) {
- memcpy(sl->rbuff, rbuff, sl->rcount);
- } else {
- sl->rcount = 0;
- dev->stats.rx_over_errors++;
- set_bit(SLF_ERROR, &sl->flags);
- }
- }
-
- dev->mtu = newmtu;
- sl->buffsize = len;
-
- spin_unlock_bh(&sl->lock);
-
- kfree(xbuff);
- kfree(rbuff);
- return 0;
-}
-
-
-/* Set the "sending" flag. This must be atomic, hence the ASM. */
-
-static inline void x25_asy_lock(struct x25_asy *sl)
-{
- netif_stop_queue(sl->dev);
-}
-
-
-/* Clear the "sending" flag. This must be atomic, hence the ASM. */
-
-static inline void x25_asy_unlock(struct x25_asy *sl)
-{
- netif_wake_queue(sl->dev);
-}
-
-/* Send an LAPB frame to the LAPB module to process. */
-
-static void x25_asy_bump(struct x25_asy *sl)
-{
- struct net_device *dev = sl->dev;
- struct sk_buff *skb;
- int count;
- int err;
-
- count = sl->rcount;
- dev->stats.rx_bytes += count;
-
- skb = dev_alloc_skb(count);
- if (skb == NULL) {
- netdev_warn(sl->dev, "memory squeeze, dropping packet\n");
- dev->stats.rx_dropped++;
- return;
- }
- skb_put_data(skb, sl->rbuff, count);
- err = lapb_data_received(sl->dev, skb);
- if (err != LAPB_OK) {
- kfree_skb(skb);
- printk(KERN_DEBUG "x25_asy: data received err - %d\n", err);
- } else {
- dev->stats.rx_packets++;
- }
-}
-
-/* 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;
-}
-
-/*
- * Called by the driver when there's room for more data. If we have
- * more packets to send, we send them here.
- */
-static void x25_asy_write_wakeup(struct tty_struct *tty)
-{
- int actual;
- struct x25_asy *sl = tty->disc_data;
-
- /* First make sure we're connected. */
- if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev))
- return;
-
- if (sl->xleft <= 0) {
- /* Now serial buffer is almost free & we can start
- * transmission of another packet */
- sl->dev->stats.tx_packets++;
- clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- x25_asy_unlock(sl);
- return;
- }
-
- actual = tty->ops->write(tty, sl->xhead, sl->xleft);
- sl->xleft -= actual;
- sl->xhead += actual;
-}
-
-static void x25_asy_timeout(struct net_device *dev, unsigned int txqueue)
-{
- struct x25_asy *sl = netdev_priv(dev);
-
- spin_lock(&sl->lock);
- if (netif_queue_stopped(dev)) {
- /* May be we must check transmitter timeout here ?
- * 14 Oct 1994 Dmitry Gorodchanin.
- */
- netdev_warn(dev, "transmit timed out, %s?\n",
- (tty_chars_in_buffer(sl->tty) || sl->xleft) ?
- "bad line quality" : "driver error");
- sl->xleft = 0;
- clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
- x25_asy_unlock(sl);
- }
- spin_unlock(&sl->lock);
-}
-
-/* Encapsulate an IP datagram and kick it into a TTY queue. */
-
-static netdev_tx_t x25_asy_xmit(struct sk_buff *skb,
- struct net_device *dev)
-{
- struct x25_asy *sl = netdev_priv(dev);
- int err;
-
- if (!netif_running(sl->dev)) {
- netdev_err(dev, "xmit call when iface is down\n");
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- /* There should be a pseudo header of 1 byte added by upper layers.
- * Check to make sure it is there before reading it.
- */
- if (skb->len < 1) {
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
-
- switch (skb->data[0]) {
- case X25_IFACE_DATA:
- break;
- case X25_IFACE_CONNECT: /* Connection request .. do nothing */
- err = lapb_connect_request(dev);
- if (err != LAPB_OK)
- netdev_err(dev, "lapb_connect_request error: %d\n",
- err);
- kfree_skb(skb);
- return NETDEV_TX_OK;
- case X25_IFACE_DISCONNECT: /* do nothing - hang up ?? */
- err = lapb_disconnect_request(dev);
- if (err != LAPB_OK)
- netdev_err(dev, "lapb_disconnect_request error: %d\n",
- err);
- fallthrough;
- default:
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- skb_pull(skb, 1); /* Remove control byte */
- /*
- * If we are busy already- too bad. We ought to be able
- * to queue things at this point, to allow for a little
- * frame buffer. Oh well...
- * -----------------------------------------------------
- * I hate queues in X.25 driver. May be it's efficient,
- * but for me latency is more important. ;)
- * So, no queues !
- * 14 Oct 1994 Dmitry Gorodchanin.
- */
-
- err = lapb_data_request(dev, skb);
- if (err != LAPB_OK) {
- netdev_err(dev, "lapb_data_request error: %d\n", err);
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- return NETDEV_TX_OK;
-}
-
-
-/*
- * LAPB interface boilerplate
- */
-
-/*
- * Called when I frame data arrive. We add a pseudo header for upper
- * layers and pass it to upper layers.
- */
-
-static int x25_asy_data_indication(struct net_device *dev, struct sk_buff *skb)
-{
- if (skb_cow(skb, 1)) {
- kfree_skb(skb);
- return NET_RX_DROP;
- }
- skb_push(skb, 1);
- skb->data[0] = X25_IFACE_DATA;
-
- skb->protocol = x25_type_trans(skb, dev);
-
- return netif_rx(skb);
-}
-
-/*
- * Data has emerged from the LAPB protocol machine. We don't handle
- * busy cases too well. Its tricky to see how to do this nicely -
- * perhaps lapb should allow us to bounce this ?
- */
-
-static void x25_asy_data_transmit(struct net_device *dev, struct sk_buff *skb)
-{
- struct x25_asy *sl = netdev_priv(dev);
-
- spin_lock(&sl->lock);
- if (netif_queue_stopped(sl->dev) || sl->tty == NULL) {
- spin_unlock(&sl->lock);
- netdev_err(dev, "tbusy drop\n");
- kfree_skb(skb);
- return;
- }
- /* We were not busy, so we are now... :-) */
- if (skb != NULL) {
- x25_asy_lock(sl);
- dev->stats.tx_bytes += skb->len;
- x25_asy_encaps(sl, skb->data, skb->len);
- dev_kfree_skb(skb);
- }
- spin_unlock(&sl->lock);
-}
-
-/*
- * LAPB connection establish/down information.
- */
-
-static void x25_asy_connected(struct net_device *dev, int reason)
-{
- struct x25_asy *sl = netdev_priv(dev);
- struct sk_buff *skb;
- unsigned char *ptr;
-
- skb = dev_alloc_skb(1);
- if (skb == NULL) {
- netdev_err(dev, "out of memory\n");
- return;
- }
-
- ptr = skb_put(skb, 1);
- *ptr = X25_IFACE_CONNECT;
-
- skb->protocol = x25_type_trans(skb, sl->dev);
- netif_rx(skb);
-}
-
-static void x25_asy_disconnected(struct net_device *dev, int reason)
-{
- struct x25_asy *sl = netdev_priv(dev);
- struct sk_buff *skb;
- unsigned char *ptr;
-
- skb = dev_alloc_skb(1);
- if (skb == NULL) {
- netdev_err(dev, "out of memory\n");
- return;
- }
-
- ptr = skb_put(skb, 1);
- *ptr = X25_IFACE_DISCONNECT;
-
- skb->protocol = x25_type_trans(skb, sl->dev);
- netif_rx(skb);
-}
-
-static const struct lapb_register_struct x25_asy_callbacks = {
- .connect_confirmation = x25_asy_connected,
- .connect_indication = x25_asy_connected,
- .disconnect_confirmation = x25_asy_disconnected,
- .disconnect_indication = x25_asy_disconnected,
- .data_indication = x25_asy_data_indication,
- .data_transmit = x25_asy_data_transmit,
-};
-
-
-/* Open the low-level part of the X.25 channel. Easy! */
-static int x25_asy_open(struct net_device *dev)
-{
- struct x25_asy *sl = netdev_priv(dev);
- unsigned long len;
-
- if (sl->tty == NULL)
- return -ENODEV;
-
- /*
- * Allocate the X.25 frame buffers:
- *
- * rbuff Receive buffer.
- * xbuff Transmit buffer.
- */
-
- len = dev->mtu * 2;
-
- sl->rbuff = kmalloc(len + 4, GFP_KERNEL);
- if (sl->rbuff == NULL)
- goto norbuff;
- sl->xbuff = kmalloc(len + 4, GFP_KERNEL);
- if (sl->xbuff == NULL)
- goto noxbuff;
-
- sl->buffsize = len;
- sl->rcount = 0;
- sl->xleft = 0;
- sl->flags &= (1 << SLF_INUSE); /* Clear ESCAPE & ERROR flags */
-
- return 0;
-
- /* Cleanup */
- kfree(sl->xbuff);
- sl->xbuff = NULL;
-noxbuff:
- kfree(sl->rbuff);
- sl->rbuff = NULL;
-norbuff:
- return -ENOMEM;
-}
-
-
-/* Close the low-level part of the X.25 channel. Easy! */
-static int x25_asy_close(struct net_device *dev)
-{
- struct x25_asy *sl = netdev_priv(dev);
-
- spin_lock(&sl->lock);
- if (sl->tty)
- clear_bit(TTY_DO_WRITE_WAKEUP, &sl->tty->flags);
-
- sl->rcount = 0;
- sl->xleft = 0;
- spin_unlock(&sl->lock);
- return 0;
-}
-
-/*
- * Handle the 'receiver data ready' interrupt.
- * This function is called by the 'tty_io' module in the kernel when
- * a block of X.25 data has been received, which can now be decapsulated
- * and sent on to some IP layer for further processing.
- */
-
-static void x25_asy_receive_buf(struct tty_struct *tty,
- const unsigned char *cp, char *fp, int count)
-{
- struct x25_asy *sl = tty->disc_data;
-
- if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev))
- return;
-
-
- /* Read the characters out of the buffer */
- while (count--) {
- if (fp && *fp++) {
- if (!test_and_set_bit(SLF_ERROR, &sl->flags))
- sl->dev->stats.rx_errors++;
- cp++;
- continue;
- }
- x25_asy_unesc(sl, *cp++);
- }
-}
-
-/*
- * Open the high-level part of the X.25 channel.
- * This function is called by the TTY module when the
- * X.25 line discipline is called for. Because we are
- * sure the tty line exists, we only have to link it to
- * a free X.25 channel...
- */
-
-static int x25_asy_open_tty(struct tty_struct *tty)
-{
- struct x25_asy *sl;
- int err;
-
- if (tty->ops->write == NULL)
- return -EOPNOTSUPP;
-
- /* OK. Find a free X.25 channel to use. */
- sl = x25_asy_alloc();
- if (sl == NULL)
- return -ENFILE;
-
- sl->tty = tty;
- tty->disc_data = sl;
- tty->receive_room = 65536;
- tty_driver_flush_buffer(tty);
- tty_ldisc_flush(tty);
-
- /* Restore default settings */
- sl->dev->type = ARPHRD_X25;
-
- /* Perform the low-level X.25 async init */
- err = x25_asy_open(sl->dev);
- if (err) {
- x25_asy_free(sl);
- return err;
- }
- /* Done. We have linked the TTY line to a channel. */
- return 0;
-}
-
-
-/*
- * Close down an X.25 channel.
- * This means flushing out any pending queues, and then restoring the
- * TTY line discipline to what it was before it got hooked to X.25
- * (which usually is TTY again).
- */
-static void x25_asy_close_tty(struct tty_struct *tty)
-{
- struct x25_asy *sl = tty->disc_data;
-
- /* First make sure we're connected. */
- if (!sl || sl->magic != X25_ASY_MAGIC)
- return;
-
- rtnl_lock();
- if (sl->dev->flags & IFF_UP)
- dev_close(sl->dev);
- rtnl_unlock();
-
- tty->disc_data = NULL;
- sl->tty = NULL;
- x25_asy_free(sl);
-}
-
- /************************************************************************
- * STANDARD X.25 ENCAPSULATION *
- ************************************************************************/
-
-static int x25_asy_esc(unsigned char *s, unsigned char *d, int len)
-{
- unsigned char *ptr = d;
- unsigned char c;
-
- /*
- * Send an initial END character to flush out any
- * data that may have accumulated in the receiver
- * due to line noise.
- */
-
- *ptr++ = X25_END; /* Send 10111110 bit seq */
-
- /*
- * For each byte in the packet, send the appropriate
- * character sequence, according to the X.25 protocol.
- */
-
- while (len-- > 0) {
- switch (c = *s++) {
- case X25_END:
- *ptr++ = X25_ESC;
- *ptr++ = X25_ESCAPE(X25_END);
- break;
- case X25_ESC:
- *ptr++ = X25_ESC;
- *ptr++ = X25_ESCAPE(X25_ESC);
- break;
- default:
- *ptr++ = c;
- break;
- }
- }
- *ptr++ = X25_END;
- return ptr - d;
-}
-
-static void x25_asy_unesc(struct x25_asy *sl, unsigned char s)
-{
-
- switch (s) {
- case X25_END:
- if (!test_and_clear_bit(SLF_ERROR, &sl->flags) &&
- sl->rcount >= 2)
- x25_asy_bump(sl);
- clear_bit(SLF_ESCAPE, &sl->flags);
- sl->rcount = 0;
- return;
- case X25_ESC:
- set_bit(SLF_ESCAPE, &sl->flags);
- return;
- case X25_ESCAPE(X25_ESC):
- case X25_ESCAPE(X25_END):
- if (test_and_clear_bit(SLF_ESCAPE, &sl->flags))
- s = X25_UNESCAPE(s);
- break;
- }
- if (!test_bit(SLF_ERROR, &sl->flags)) {
- if (sl->rcount < sl->buffsize) {
- sl->rbuff[sl->rcount++] = s;
- return;
- }
- sl->dev->stats.rx_over_errors++;
- set_bit(SLF_ERROR, &sl->flags);
- }
-}
-
-
-/* Perform I/O control on an active X.25 channel. */
-static int x25_asy_ioctl(struct tty_struct *tty, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct x25_asy *sl = tty->disc_data;
-
- /* First make sure we're connected. */
- if (!sl || sl->magic != X25_ASY_MAGIC)
- return -EINVAL;
-
- switch (cmd) {
- case SIOCGIFNAME:
- if (copy_to_user((void __user *)arg, sl->dev->name,
- strlen(sl->dev->name) + 1))
- return -EFAULT;
- return 0;
- case SIOCSIFHWADDR:
- return -EINVAL;
- default:
- return tty_mode_ioctl(tty, file, cmd, arg);
- }
-}
-
-static int x25_asy_open_dev(struct net_device *dev)
-{
- int err;
- struct x25_asy *sl = netdev_priv(dev);
- if (sl->tty == NULL)
- return -ENODEV;
-
- err = lapb_register(dev, &x25_asy_callbacks);
- if (err != LAPB_OK)
- return -ENOMEM;
-
- netif_start_queue(dev);
-
- return 0;
-}
-
-static int x25_asy_close_dev(struct net_device *dev)
-{
- int err;
-
- netif_stop_queue(dev);
-
- err = lapb_unregister(dev);
- if (err != LAPB_OK)
- pr_err("%s: lapb_unregister error: %d\n",
- __func__, err);
-
- x25_asy_close(dev);
-
- return 0;
-}
-
-static const struct net_device_ops x25_asy_netdev_ops = {
- .ndo_open = x25_asy_open_dev,
- .ndo_stop = x25_asy_close_dev,
- .ndo_start_xmit = x25_asy_xmit,
- .ndo_tx_timeout = x25_asy_timeout,
- .ndo_change_mtu = x25_asy_change_mtu,
-};
-
-/* Initialise the X.25 driver. Called by the device init code */
-static void x25_asy_setup(struct net_device *dev)
-{
- struct x25_asy *sl = netdev_priv(dev);
-
- sl->magic = X25_ASY_MAGIC;
- sl->dev = dev;
- spin_lock_init(&sl->lock);
- set_bit(SLF_INUSE, &sl->flags);
-
- /*
- * Finish setting up the DEVICE info.
- */
-
- dev->mtu = SL_MTU;
- dev->min_mtu = 0;
- dev->max_mtu = 65534;
- dev->netdev_ops = &x25_asy_netdev_ops;
- dev->watchdog_timeo = HZ*20;
- dev->hard_header_len = 0;
- dev->addr_len = 0;
- dev->type = ARPHRD_X25;
- dev->tx_queue_len = 10;
-
- /* When transmitting data:
- * first this driver removes a pseudo header of 1 byte,
- * then the lapb module prepends an LAPB header of at most 3 bytes.
- */
- dev->needed_headroom = 3 - 1;
-
- /* New-style flags. */
- dev->flags = IFF_NOARP;
-}
-
-static struct tty_ldisc_ops x25_ldisc = {
- .owner = THIS_MODULE,
- .magic = TTY_LDISC_MAGIC,
- .name = "X.25",
- .open = x25_asy_open_tty,
- .close = x25_asy_close_tty,
- .ioctl = x25_asy_ioctl,
- .receive_buf = x25_asy_receive_buf,
- .write_wakeup = x25_asy_write_wakeup,
-};
-
-static int __init init_x25_asy(void)
-{
- if (x25_asy_maxdev < 4)
- x25_asy_maxdev = 4; /* Sanity */
-
- pr_info("X.25 async: version 0.00 ALPHA (dynamic channels, max=%d)\n",
- x25_asy_maxdev);
-
- x25_asy_devs = kcalloc(x25_asy_maxdev, sizeof(struct net_device *),
- GFP_KERNEL);
- if (!x25_asy_devs)
- return -ENOMEM;
-
- return tty_register_ldisc(N_X25, &x25_ldisc);
-}
-
-
-static void __exit exit_x25_asy(void)
-{
- struct net_device *dev;
- int i;
-
- for (i = 0; i < x25_asy_maxdev; i++) {
- dev = x25_asy_devs[i];
- if (dev) {
- struct x25_asy *sl = netdev_priv(dev);
-
- spin_lock_bh(&sl->lock);
- if (sl->tty)
- tty_hangup(sl->tty);
-
- spin_unlock_bh(&sl->lock);
- /*
- * VSV = if dev->start==0, then device
- * unregistered while close proc.
- */
- unregister_netdev(dev);
- free_netdev(dev);
- }
- }
-
- kfree(x25_asy_devs);
- tty_unregister_ldisc(N_X25);
-}
-
-module_init(init_x25_asy);
-module_exit(exit_x25_asy);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.