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