?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge tag 'riscv-for-linus-4.15-rc2_cleanups' of git://git.kernel.org/pub/scm/linux...
[linux/fpc-iii.git] / drivers / isdn / mISDN / stack.c
blob422dced7c90ac26dcf0d366fedb32ab9edf44207
1 /*
2 *
3 * Author Karsten Keil <kkeil@novell.com>
4 *
5 * Copyright 2008 by Karsten Keil <kkeil@novell.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18 #include <linux/slab.h>
19 #include <linux/mISDNif.h>
20 #include <linux/kthread.h>
21 #include <linux/sched.h>
22 #include <linux/sched/cputime.h>
23 #include <linux/signal.h>
24
25 #include "core.h"
26
27 static u_int *debug;
28
29 static inline void
30 _queue_message(struct mISDNstack *st, struct sk_buff *skb)
31 {
32 struct mISDNhead *hh = mISDN_HEAD_P(skb);
33
34 if (*debug & DEBUG_QUEUE_FUNC)
35 printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n",
36 __func__, hh->prim, hh->id, skb);
37 skb_queue_tail(&st->msgq, skb);
38 if (likely(!test_bit(mISDN_STACK_STOPPED, &st->status))) {
39 test_and_set_bit(mISDN_STACK_WORK, &st->status);
40 wake_up_interruptible(&st->workq);
41 }
42 }
43
44 static int
45 mISDN_queue_message(struct mISDNchannel *ch, struct sk_buff *skb)
46 {
47 _queue_message(ch->st, skb);
48 return 0;
49 }
50
51 static struct mISDNchannel *
52 get_channel4id(struct mISDNstack *st, u_int id)
53 {
54 struct mISDNchannel *ch;
55
56 mutex_lock(&st->lmutex);
57 list_for_each_entry(ch, &st->layer2, list) {
58 if (id == ch->nr)
59 goto unlock;
60 }
61 ch = NULL;
62 unlock:
63 mutex_unlock(&st->lmutex);
64 return ch;
65 }
66
67 static void
68 send_socklist(struct mISDN_sock_list *sl, struct sk_buff *skb)
69 {
70 struct sock *sk;
71 struct sk_buff *cskb = NULL;
72
73 read_lock(&sl->lock);
74 sk_for_each(sk, &sl->head) {
75 if (sk->sk_state != MISDN_BOUND)
76 continue;
77 if (!cskb)
78 cskb = skb_copy(skb, GFP_ATOMIC);
79 if (!cskb) {
80 printk(KERN_WARNING "%s no skb\n", __func__);
81 break;
82 }
83 if (!sock_queue_rcv_skb(sk, cskb))
84 cskb = NULL;
85 }
86 read_unlock(&sl->lock);
87 if (cskb)
88 dev_kfree_skb(cskb);
89 }
90
91 static void
92 send_layer2(struct mISDNstack *st, struct sk_buff *skb)
93 {
94 struct sk_buff *cskb;
95 struct mISDNhead *hh = mISDN_HEAD_P(skb);
96 struct mISDNchannel *ch;
97 int ret;
98
99 if (!st)
100 return;
101 mutex_lock(&st->lmutex);
102 if ((hh->id & MISDN_ID_ADDR_MASK) == MISDN_ID_ANY) { /* L2 for all */
103 list_for_each_entry(ch, &st->layer2, list) {
104 if (list_is_last(&ch->list, &st->layer2)) {
105 cskb = skb;
106 skb = NULL;
107 } else {
108 cskb = skb_copy(skb, GFP_KERNEL);
109 }
110 if (cskb) {
111 ret = ch->send(ch, cskb);
112 if (ret) {
113 if (*debug & DEBUG_SEND_ERR)
114 printk(KERN_DEBUG
115 "%s ch%d prim(%x) addr(%x)"
116 " err %d\n",
117 __func__, ch->nr,
118 hh->prim, ch->addr, ret);
119 dev_kfree_skb(cskb);
120 }
121 } else {
122 printk(KERN_WARNING "%s ch%d addr %x no mem\n",
123 __func__, ch->nr, ch->addr);
124 goto out;
125 }
126 }
127 } else {
128 list_for_each_entry(ch, &st->layer2, list) {
129 if ((hh->id & MISDN_ID_ADDR_MASK) == ch->addr) {
130 ret = ch->send(ch, skb);
131 if (!ret)
132 skb = NULL;
133 goto out;
134 }
135 }
136 ret = st->dev->teimgr->ctrl(st->dev->teimgr, CHECK_DATA, skb);
137 if (!ret)
138 skb = NULL;
139 else if (*debug & DEBUG_SEND_ERR)
140 printk(KERN_DEBUG
141 "%s mgr prim(%x) err %d\n",
142 __func__, hh->prim, ret);
143 }
144 out:
145 mutex_unlock(&st->lmutex);
146 if (skb)
147 dev_kfree_skb(skb);
148 }
149
150 static inline int
151 send_msg_to_layer(struct mISDNstack *st, struct sk_buff *skb)
152 {
153 struct mISDNhead *hh = mISDN_HEAD_P(skb);
154 struct mISDNchannel *ch;
155 int lm;
156
157 lm = hh->prim & MISDN_LAYERMASK;
158 if (*debug & DEBUG_QUEUE_FUNC)
159 printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n",
160 __func__, hh->prim, hh->id, skb);
161 if (lm == 0x1) {
162 if (!hlist_empty(&st->l1sock.head)) {
163 __net_timestamp(skb);
164 send_socklist(&st->l1sock, skb);
165 }
166 return st->layer1->send(st->layer1, skb);
167 } else if (lm == 0x2) {
168 if (!hlist_empty(&st->l1sock.head))
169 send_socklist(&st->l1sock, skb);
170 send_layer2(st, skb);
171 return 0;
172 } else if (lm == 0x4) {
173 ch = get_channel4id(st, hh->id);
174 if (ch)
175 return ch->send(ch, skb);
176 else
177 printk(KERN_WARNING
178 "%s: dev(%s) prim(%x) id(%x) no channel\n",
179 __func__, dev_name(&st->dev->dev), hh->prim,
180 hh->id);
181 } else if (lm == 0x8) {
182 WARN_ON(lm == 0x8);
183 ch = get_channel4id(st, hh->id);
184 if (ch)
185 return ch->send(ch, skb);
186 else
187 printk(KERN_WARNING
188 "%s: dev(%s) prim(%x) id(%x) no channel\n",
189 __func__, dev_name(&st->dev->dev), hh->prim,
190 hh->id);
191 } else {
192 /* broadcast not handled yet */
193 printk(KERN_WARNING "%s: dev(%s) prim %x not delivered\n",
194 __func__, dev_name(&st->dev->dev), hh->prim);
195 }
196 return -ESRCH;
197 }
198
199 static void
200 do_clear_stack(struct mISDNstack *st)
201 {
202 }
203
204 static int
205 mISDNStackd(void *data)
206 {
207 struct mISDNstack *st = data;
208 #ifdef MISDN_MSG_STATS
209 u64 utime, stime;
210 #endif
211 int err = 0;
212
213 sigfillset(&current->blocked);
214 if (*debug & DEBUG_MSG_THREAD)
215 printk(KERN_DEBUG "mISDNStackd %s started\n",
216 dev_name(&st->dev->dev));
217
218 if (st->notify != NULL) {
219 complete(st->notify);
220 st->notify = NULL;
221 }
222
223 for (;;) {
224 struct sk_buff *skb;
225
226 if (unlikely(test_bit(mISDN_STACK_STOPPED, &st->status))) {
227 test_and_clear_bit(mISDN_STACK_WORK, &st->status);
228 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
229 } else
230 test_and_set_bit(mISDN_STACK_RUNNING, &st->status);
231 while (test_bit(mISDN_STACK_WORK, &st->status)) {
232 skb = skb_dequeue(&st->msgq);
233 if (!skb) {
234 test_and_clear_bit(mISDN_STACK_WORK,
235 &st->status);
236 /* test if a race happens */
237 skb = skb_dequeue(&st->msgq);
238 if (!skb)
239 continue;
240 test_and_set_bit(mISDN_STACK_WORK,
241 &st->status);
242 }
243 #ifdef MISDN_MSG_STATS
244 st->msg_cnt++;
245 #endif
246 err = send_msg_to_layer(st, skb);
247 if (unlikely(err)) {
248 if (*debug & DEBUG_SEND_ERR)
249 printk(KERN_DEBUG
250 "%s: %s prim(%x) id(%x) "
251 "send call(%d)\n",
252 __func__, dev_name(&st->dev->dev),
253 mISDN_HEAD_PRIM(skb),
254 mISDN_HEAD_ID(skb), err);
255 dev_kfree_skb(skb);
256 continue;
257 }
258 if (unlikely(test_bit(mISDN_STACK_STOPPED,
259 &st->status))) {
260 test_and_clear_bit(mISDN_STACK_WORK,
261 &st->status);
262 test_and_clear_bit(mISDN_STACK_RUNNING,
263 &st->status);
264 break;
265 }
266 }
267 if (test_bit(mISDN_STACK_CLEARING, &st->status)) {
268 test_and_set_bit(mISDN_STACK_STOPPED, &st->status);
269 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
270 do_clear_stack(st);
271 test_and_clear_bit(mISDN_STACK_CLEARING, &st->status);
272 test_and_set_bit(mISDN_STACK_RESTART, &st->status);
273 }
274 if (test_and_clear_bit(mISDN_STACK_RESTART, &st->status)) {
275 test_and_clear_bit(mISDN_STACK_STOPPED, &st->status);
276 test_and_set_bit(mISDN_STACK_RUNNING, &st->status);
277 if (!skb_queue_empty(&st->msgq))
278 test_and_set_bit(mISDN_STACK_WORK,
279 &st->status);
280 }
281 if (test_bit(mISDN_STACK_ABORT, &st->status))
282 break;
283 if (st->notify != NULL) {
284 complete(st->notify);
285 st->notify = NULL;
286 }
287 #ifdef MISDN_MSG_STATS
288 st->sleep_cnt++;
289 #endif
290 test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status);
291 wait_event_interruptible(st->workq, (st->status &
292 mISDN_STACK_ACTION_MASK));
293 if (*debug & DEBUG_MSG_THREAD)
294 printk(KERN_DEBUG "%s: %s wake status %08lx\n",
295 __func__, dev_name(&st->dev->dev), st->status);
296 test_and_set_bit(mISDN_STACK_ACTIVE, &st->status);
297
298 test_and_clear_bit(mISDN_STACK_WAKEUP, &st->status);
299
300 if (test_bit(mISDN_STACK_STOPPED, &st->status)) {
301 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
302 #ifdef MISDN_MSG_STATS
303 st->stopped_cnt++;
304 #endif
305 }
306 }
307 #ifdef MISDN_MSG_STATS
308 printk(KERN_DEBUG "mISDNStackd daemon for %s proceed %d "
309 "msg %d sleep %d stopped\n",
310 dev_name(&st->dev->dev), st->msg_cnt, st->sleep_cnt,
311 st->stopped_cnt);
312 task_cputime(st->thread, &utime, &stime);
313 printk(KERN_DEBUG
314 "mISDNStackd daemon for %s utime(%llu) stime(%llu)\n",
315 dev_name(&st->dev->dev), utime, stime);
316 printk(KERN_DEBUG
317 "mISDNStackd daemon for %s nvcsw(%ld) nivcsw(%ld)\n",
318 dev_name(&st->dev->dev), st->thread->nvcsw, st->thread->nivcsw);
319 printk(KERN_DEBUG "mISDNStackd daemon for %s killed now\n",
320 dev_name(&st->dev->dev));
321 #endif
322 test_and_set_bit(mISDN_STACK_KILLED, &st->status);
323 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status);
324 test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status);
325 test_and_clear_bit(mISDN_STACK_ABORT, &st->status);
326 skb_queue_purge(&st->msgq);
327 st->thread = NULL;
328 if (st->notify != NULL) {
329 complete(st->notify);
330 st->notify = NULL;
331 }
332 return 0;
333 }
334
335 static int
336 l1_receive(struct mISDNchannel *ch, struct sk_buff *skb)
337 {
338 if (!ch->st)
339 return -ENODEV;
340 __net_timestamp(skb);
341 _queue_message(ch->st, skb);
342 return 0;
343 }
344
345 void
346 set_channel_address(struct mISDNchannel *ch, u_int sapi, u_int tei)
347 {
348 ch->addr = sapi | (tei << 8);
349 }
350
351 void
352 __add_layer2(struct mISDNchannel *ch, struct mISDNstack *st)
353 {
354 list_add_tail(&ch->list, &st->layer2);
355 }
356
357 void
358 add_layer2(struct mISDNchannel *ch, struct mISDNstack *st)
359 {
360 mutex_lock(&st->lmutex);
361 __add_layer2(ch, st);
362 mutex_unlock(&st->lmutex);
363 }
364
365 static int
366 st_own_ctrl(struct mISDNchannel *ch, u_int cmd, void *arg)
367 {
368 if (!ch->st || !ch->st->layer1)
369 return -EINVAL;
370 return ch->st->layer1->ctrl(ch->st->layer1, cmd, arg);
371 }
372
373 int
374 create_stack(struct mISDNdevice *dev)
375 {
376 struct mISDNstack *newst;
377 int err;
378 DECLARE_COMPLETION_ONSTACK(done);
379
380 newst = kzalloc(sizeof(struct mISDNstack), GFP_KERNEL);
381 if (!newst) {
382 printk(KERN_ERR "kmalloc mISDN_stack failed\n");
383 return -ENOMEM;
384 }
385 newst->dev = dev;
386 INIT_LIST_HEAD(&newst->layer2);
387 INIT_HLIST_HEAD(&newst->l1sock.head);
388 rwlock_init(&newst->l1sock.lock);
389 init_waitqueue_head(&newst->workq);
390 skb_queue_head_init(&newst->msgq);
391 mutex_init(&newst->lmutex);
392 dev->D.st = newst;
393 err = create_teimanager(dev);
394 if (err) {
395 printk(KERN_ERR "kmalloc teimanager failed\n");
396 kfree(newst);
397 return err;
398 }
399 dev->teimgr->peer = &newst->own;
400 dev->teimgr->recv = mISDN_queue_message;
401 dev->teimgr->st = newst;
402 newst->layer1 = &dev->D;
403 dev->D.recv = l1_receive;
404 dev->D.peer = &newst->own;
405 newst->own.st = newst;
406 newst->own.ctrl = st_own_ctrl;
407 newst->own.send = mISDN_queue_message;
408 newst->own.recv = mISDN_queue_message;
409 if (*debug & DEBUG_CORE_FUNC)
410 printk(KERN_DEBUG "%s: st(%s)\n", __func__,
411 dev_name(&newst->dev->dev));
412 newst->notify = &done;
413 newst->thread = kthread_run(mISDNStackd, (void *)newst, "mISDN_%s",
414 dev_name(&newst->dev->dev));
415 if (IS_ERR(newst->thread)) {
416 err = PTR_ERR(newst->thread);
417 printk(KERN_ERR
418 "mISDN:cannot create kernel thread for %s (%d)\n",
419 dev_name(&newst->dev->dev), err);
420 delete_teimanager(dev->teimgr);
421 kfree(newst);
422 } else
423 wait_for_completion(&done);
424 return err;
425 }
426
427 int
428 connect_layer1(struct mISDNdevice *dev, struct mISDNchannel *ch,
429 u_int protocol, struct sockaddr_mISDN *adr)
430 {
431 struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch);
432 struct channel_req rq;
433 int err;
434
435
436 if (*debug & DEBUG_CORE_FUNC)
437 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
438 __func__, dev_name(&dev->dev), protocol, adr->dev,
439 adr->channel, adr->sapi, adr->tei);
440 switch (protocol) {
441 case ISDN_P_NT_S0:
442 case ISDN_P_NT_E1:
443 case ISDN_P_TE_S0:
444 case ISDN_P_TE_E1:
445 ch->recv = mISDN_queue_message;
446 ch->peer = &dev->D.st->own;
447 ch->st = dev->D.st;
448 rq.protocol = protocol;
449 rq.adr.channel = adr->channel;
450 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
451 printk(KERN_DEBUG "%s: ret %d (dev %d)\n", __func__, err,
452 dev->id);
453 if (err)
454 return err;
455 write_lock_bh(&dev->D.st->l1sock.lock);
456 sk_add_node(&msk->sk, &dev->D.st->l1sock.head);
457 write_unlock_bh(&dev->D.st->l1sock.lock);
458 break;
459 default:
460 return -ENOPROTOOPT;
461 }
462 return 0;
463 }
464
465 int
466 connect_Bstack(struct mISDNdevice *dev, struct mISDNchannel *ch,
467 u_int protocol, struct sockaddr_mISDN *adr)
468 {
469 struct channel_req rq, rq2;
470 int pmask, err;
471 struct Bprotocol *bp;
472
473 if (*debug & DEBUG_CORE_FUNC)
474 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
475 __func__, dev_name(&dev->dev), protocol,
476 adr->dev, adr->channel, adr->sapi,
477 adr->tei);
478 ch->st = dev->D.st;
479 pmask = 1 << (protocol & ISDN_P_B_MASK);
480 if (pmask & dev->Bprotocols) {
481 rq.protocol = protocol;
482 rq.adr = *adr;
483 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
484 if (err)
485 return err;
486 ch->recv = rq.ch->send;
487 ch->peer = rq.ch;
488 rq.ch->recv = ch->send;
489 rq.ch->peer = ch;
490 rq.ch->st = dev->D.st;
491 } else {
492 bp = get_Bprotocol4mask(pmask);
493 if (!bp)
494 return -ENOPROTOOPT;
495 rq2.protocol = protocol;
496 rq2.adr = *adr;
497 rq2.ch = ch;
498 err = bp->create(&rq2);
499 if (err)
500 return err;
501 ch->recv = rq2.ch->send;
502 ch->peer = rq2.ch;
503 rq2.ch->st = dev->D.st;
504 rq.protocol = rq2.protocol;
505 rq.adr = *adr;
506 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
507 if (err) {
508 rq2.ch->ctrl(rq2.ch, CLOSE_CHANNEL, NULL);
509 return err;
510 }
511 rq2.ch->recv = rq.ch->send;
512 rq2.ch->peer = rq.ch;
513 rq.ch->recv = rq2.ch->send;
514 rq.ch->peer = rq2.ch;
515 rq.ch->st = dev->D.st;
516 }
517 ch->protocol = protocol;
518 ch->nr = rq.ch->nr;
519 return 0;
520 }
521
522 int
523 create_l2entity(struct mISDNdevice *dev, struct mISDNchannel *ch,
524 u_int protocol, struct sockaddr_mISDN *adr)
525 {
526 struct channel_req rq;
527 int err;
528
529 if (*debug & DEBUG_CORE_FUNC)
530 printk(KERN_DEBUG "%s: %s proto(%x) adr(%d %d %d %d)\n",
531 __func__, dev_name(&dev->dev), protocol,
532 adr->dev, adr->channel, adr->sapi,
533 adr->tei);
534 rq.protocol = ISDN_P_TE_S0;
535 if (dev->Dprotocols & (1 << ISDN_P_TE_E1))
536 rq.protocol = ISDN_P_TE_E1;
537 switch (protocol) {
538 case ISDN_P_LAPD_NT:
539 rq.protocol = ISDN_P_NT_S0;
540 if (dev->Dprotocols & (1 << ISDN_P_NT_E1))
541 rq.protocol = ISDN_P_NT_E1;
542 case ISDN_P_LAPD_TE:
543 ch->recv = mISDN_queue_message;
544 ch->peer = &dev->D.st->own;
545 ch->st = dev->D.st;
546 rq.adr.channel = 0;
547 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq);
548 printk(KERN_DEBUG "%s: ret 1 %d\n", __func__, err);
549 if (err)
550 break;
551 rq.protocol = protocol;
552 rq.adr = *adr;
553 rq.ch = ch;
554 err = dev->teimgr->ctrl(dev->teimgr, OPEN_CHANNEL, &rq);
555 printk(KERN_DEBUG "%s: ret 2 %d\n", __func__, err);
556 if (!err) {
557 if ((protocol == ISDN_P_LAPD_NT) && !rq.ch)
558 break;
559 add_layer2(rq.ch, dev->D.st);
560 rq.ch->recv = mISDN_queue_message;
561 rq.ch->peer = &dev->D.st->own;
562 rq.ch->ctrl(rq.ch, OPEN_CHANNEL, NULL); /* can't fail */
563 }
564 break;
565 default:
566 err = -EPROTONOSUPPORT;
567 }
568 return err;
569 }
570
571 void
572 delete_channel(struct mISDNchannel *ch)
573 {
574 struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch);
575 struct mISDNchannel *pch;
576
577 if (!ch->st) {
578 printk(KERN_WARNING "%s: no stack\n", __func__);
579 return;
580 }
581 if (*debug & DEBUG_CORE_FUNC)
582 printk(KERN_DEBUG "%s: st(%s) protocol(%x)\n", __func__,
583 dev_name(&ch->st->dev->dev), ch->protocol);
584 if (ch->protocol >= ISDN_P_B_START) {
585 if (ch->peer) {
586 ch->peer->ctrl(ch->peer, CLOSE_CHANNEL, NULL);
587 ch->peer = NULL;
588 }
589 return;
590 }
591 switch (ch->protocol) {
592 case ISDN_P_NT_S0:
593 case ISDN_P_TE_S0:
594 case ISDN_P_NT_E1:
595 case ISDN_P_TE_E1:
596 write_lock_bh(&ch->st->l1sock.lock);
597 sk_del_node_init(&msk->sk);
598 write_unlock_bh(&ch->st->l1sock.lock);
599 ch->st->dev->D.ctrl(&ch->st->dev->D, CLOSE_CHANNEL, NULL);
600 break;
601 case ISDN_P_LAPD_TE:
602 pch = get_channel4id(ch->st, ch->nr);
603 if (pch) {
604 mutex_lock(&ch->st->lmutex);
605 list_del(&pch->list);
606 mutex_unlock(&ch->st->lmutex);
607 pch->ctrl(pch, CLOSE_CHANNEL, NULL);
608 pch = ch->st->dev->teimgr;
609 pch->ctrl(pch, CLOSE_CHANNEL, NULL);
610 } else
611 printk(KERN_WARNING "%s: no l2 channel\n",
612 __func__);
613 break;
614 case ISDN_P_LAPD_NT:
615 pch = ch->st->dev->teimgr;
616 if (pch) {
617 pch->ctrl(pch, CLOSE_CHANNEL, NULL);
618 } else
619 printk(KERN_WARNING "%s: no l2 channel\n",
620 __func__);
621 break;
622 default:
623 break;
624 }
625 return;
626 }
627
628 void
629 delete_stack(struct mISDNdevice *dev)
630 {
631 struct mISDNstack *st = dev->D.st;
632 DECLARE_COMPLETION_ONSTACK(done);
633
634 if (*debug & DEBUG_CORE_FUNC)
635 printk(KERN_DEBUG "%s: st(%s)\n", __func__,
636 dev_name(&st->dev->dev));
637 if (dev->teimgr)
638 delete_teimanager(dev->teimgr);
639 if (st->thread) {
640 if (st->notify) {
641 printk(KERN_WARNING "%s: notifier in use\n",
642 __func__);
643 complete(st->notify);
644 }
645 st->notify = &done;
646 test_and_set_bit(mISDN_STACK_ABORT, &st->status);
647 test_and_set_bit(mISDN_STACK_WAKEUP, &st->status);
648 wake_up_interruptible(&st->workq);
649 wait_for_completion(&done);
650 }
651 if (!list_empty(&st->layer2))
652 printk(KERN_WARNING "%s: layer2 list not empty\n",
653 __func__);
654 if (!hlist_empty(&st->l1sock.head))
655 printk(KERN_WARNING "%s: layer1 list not empty\n",
656 __func__);
657 kfree(st);
658 }
659
660 void
661 mISDN_initstack(u_int *dp)
662 {
663 debug = dp;
664 }
Linux with added FPC-III support