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/mISDNif.h> 19 #include <linux/kthread.h> 20 #include "core.h" 21 22 static u_int *debug; 23 24 static inline void 25 _queue_message(struct mISDNstack *st, struct sk_buff *skb) 26 { 27 struct mISDNhead *hh = mISDN_HEAD_P(skb); 28 29 if (*debug & DEBUG_QUEUE_FUNC) 30 printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n", 31 __func__, hh->prim, hh->id, skb); 32 skb_queue_tail(&st->msgq, skb); 33 if (likely(!test_bit(mISDN_STACK_STOPPED, &st->status))) { 34 test_and_set_bit(mISDN_STACK_WORK, &st->status); 35 wake_up_interruptible(&st->workq); 36 } 37 } 38 39 static int 40 mISDN_queue_message(struct mISDNchannel *ch, struct sk_buff *skb) 41 { 42 _queue_message(ch->st, skb); 43 return 0; 44 } 45 46 static struct mISDNchannel * 47 get_channel4id(struct mISDNstack *st, u_int id) 48 { 49 struct mISDNchannel *ch; 50 51 mutex_lock(&st->lmutex); 52 list_for_each_entry(ch, &st->layer2, list) { 53 if (id == ch->nr) 54 goto unlock; 55 } 56 ch = NULL; 57 unlock: 58 mutex_unlock(&st->lmutex); 59 return ch; 60 } 61 62 static void 63 send_socklist(struct mISDN_sock_list *sl, struct sk_buff *skb) 64 { 65 struct hlist_node *node; 66 struct sock *sk; 67 struct sk_buff *cskb = NULL; 68 69 read_lock(&sl->lock); 70 sk_for_each(sk, node, &sl->head) { 71 if (sk->sk_state != MISDN_BOUND) 72 continue; 73 if (!cskb) 74 cskb = skb_copy(skb, GFP_KERNEL); 75 if (!cskb) { 76 printk(KERN_WARNING "%s no skb\n", __func__); 77 break; 78 } 79 if (!sock_queue_rcv_skb(sk, cskb)) 80 cskb = NULL; 81 } 82 read_unlock(&sl->lock); 83 if (cskb) 84 dev_kfree_skb(cskb); 85 } 86 87 static void 88 send_layer2(struct mISDNstack *st, struct sk_buff *skb) 89 { 90 struct sk_buff *cskb; 91 struct mISDNhead *hh = mISDN_HEAD_P(skb); 92 struct mISDNchannel *ch; 93 int ret; 94 95 if (!st) 96 return; 97 mutex_lock(&st->lmutex); 98 if ((hh->id & MISDN_ID_ADDR_MASK) == MISDN_ID_ANY) { /* L2 for all */ 99 list_for_each_entry(ch, &st->layer2, list) { 100 if (list_is_last(&ch->list, &st->layer2)) { 101 cskb = skb; 102 skb = NULL; 103 } else { 104 cskb = skb_copy(skb, GFP_KERNEL); 105 } 106 if (cskb) { 107 ret = ch->send(ch, cskb); 108 if (ret) { 109 if (*debug & DEBUG_SEND_ERR) 110 printk(KERN_DEBUG 111 "%s ch%d prim(%x) addr(%x)" 112 " err %d\n", 113 __func__, ch->nr, 114 hh->prim, ch->addr, ret); 115 dev_kfree_skb(cskb); 116 } 117 } else { 118 printk(KERN_WARNING "%s ch%d addr %x no mem\n", 119 __func__, ch->nr, ch->addr); 120 goto out; 121 } 122 } 123 } else { 124 list_for_each_entry(ch, &st->layer2, list) { 125 if ((hh->id & MISDN_ID_ADDR_MASK) == ch->addr) { 126 ret = ch->send(ch, skb); 127 if (!ret) 128 skb = NULL; 129 goto out; 130 } 131 } 132 ret = st->dev->teimgr->ctrl(st->dev->teimgr, CHECK_DATA, skb); 133 if (!ret) 134 skb = NULL; 135 else if (*debug & DEBUG_SEND_ERR) 136 printk(KERN_DEBUG 137 "%s ch%d mgr prim(%x) addr(%x) err %d\n", 138 __func__, ch->nr, hh->prim, ch->addr, ret); 139 } 140 out: 141 mutex_unlock(&st->lmutex); 142 if (skb) 143 dev_kfree_skb(skb); 144 } 145 146 static inline int 147 send_msg_to_layer(struct mISDNstack *st, struct sk_buff *skb) 148 { 149 struct mISDNhead *hh = mISDN_HEAD_P(skb); 150 struct mISDNchannel *ch; 151 int lm; 152 153 lm = hh->prim & MISDN_LAYERMASK; 154 if (*debug & DEBUG_QUEUE_FUNC) 155 printk(KERN_DEBUG "%s prim(%x) id(%x) %p\n", 156 __func__, hh->prim, hh->id, skb); 157 if (lm == 0x1) { 158 if (!hlist_empty(&st->l1sock.head)) { 159 __net_timestamp(skb); 160 send_socklist(&st->l1sock, skb); 161 } 162 return st->layer1->send(st->layer1, skb); 163 } else if (lm == 0x2) { 164 if (!hlist_empty(&st->l1sock.head)) 165 send_socklist(&st->l1sock, skb); 166 send_layer2(st, skb); 167 return 0; 168 } else if (lm == 0x4) { 169 ch = get_channel4id(st, hh->id); 170 if (ch) 171 return ch->send(ch, skb); 172 else 173 printk(KERN_WARNING 174 "%s: dev(%s) prim(%x) id(%x) no channel\n", 175 __func__, dev_name(&st->dev->dev), hh->prim, 176 hh->id); 177 } else if (lm == 0x8) { 178 WARN_ON(lm == 0x8); 179 ch = get_channel4id(st, hh->id); 180 if (ch) 181 return ch->send(ch, skb); 182 else 183 printk(KERN_WARNING 184 "%s: dev(%s) prim(%x) id(%x) no channel\n", 185 __func__, dev_name(&st->dev->dev), hh->prim, 186 hh->id); 187 } else { 188 /* broadcast not handled yet */ 189 printk(KERN_WARNING "%s: dev(%s) prim %x not delivered\n", 190 __func__, dev_name(&st->dev->dev), hh->prim); 191 } 192 return -ESRCH; 193 } 194 195 static void 196 do_clear_stack(struct mISDNstack *st) 197 { 198 } 199 200 static int 201 mISDNStackd(void *data) 202 { 203 struct mISDNstack *st = data; 204 int err = 0; 205 206 #ifdef CONFIG_SMP 207 lock_kernel(); 208 #endif 209 sigfillset(¤t->blocked); 210 #ifdef CONFIG_SMP 211 unlock_kernel(); 212 #endif 213 if (*debug & DEBUG_MSG_THREAD) 214 printk(KERN_DEBUG "mISDNStackd %s started\n", 215 dev_name(&st->dev->dev)); 216 217 if (st->notify != NULL) { 218 complete(st->notify); 219 st->notify = NULL; 220 } 221 222 for (;;) { 223 struct sk_buff *skb; 224 225 if (unlikely(test_bit(mISDN_STACK_STOPPED, &st->status))) { 226 test_and_clear_bit(mISDN_STACK_WORK, &st->status); 227 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); 228 } else 229 test_and_set_bit(mISDN_STACK_RUNNING, &st->status); 230 while (test_bit(mISDN_STACK_WORK, &st->status)) { 231 skb = skb_dequeue(&st->msgq); 232 if (!skb) { 233 test_and_clear_bit(mISDN_STACK_WORK, 234 &st->status); 235 /* test if a race happens */ 236 skb = skb_dequeue(&st->msgq); 237 if (!skb) 238 continue; 239 test_and_set_bit(mISDN_STACK_WORK, 240 &st->status); 241 } 242 #ifdef MISDN_MSG_STATS 243 st->msg_cnt++; 244 #endif 245 err = send_msg_to_layer(st, skb); 246 if (unlikely(err)) { 247 if (*debug & DEBUG_SEND_ERR) 248 printk(KERN_DEBUG 249 "%s: %s prim(%x) id(%x) " 250 "send call(%d)\n", 251 __func__, dev_name(&st->dev->dev), 252 mISDN_HEAD_PRIM(skb), 253 mISDN_HEAD_ID(skb), err); 254 dev_kfree_skb(skb); 255 continue; 256 } 257 if (unlikely(test_bit(mISDN_STACK_STOPPED, 258 &st->status))) { 259 test_and_clear_bit(mISDN_STACK_WORK, 260 &st->status); 261 test_and_clear_bit(mISDN_STACK_RUNNING, 262 &st->status); 263 break; 264 } 265 } 266 if (test_bit(mISDN_STACK_CLEARING, &st->status)) { 267 test_and_set_bit(mISDN_STACK_STOPPED, &st->status); 268 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); 269 do_clear_stack(st); 270 test_and_clear_bit(mISDN_STACK_CLEARING, &st->status); 271 test_and_set_bit(mISDN_STACK_RESTART, &st->status); 272 } 273 if (test_and_clear_bit(mISDN_STACK_RESTART, &st->status)) { 274 test_and_clear_bit(mISDN_STACK_STOPPED, &st->status); 275 test_and_set_bit(mISDN_STACK_RUNNING, &st->status); 276 if (!skb_queue_empty(&st->msgq)) 277 test_and_set_bit(mISDN_STACK_WORK, 278 &st->status); 279 } 280 if (test_bit(mISDN_STACK_ABORT, &st->status)) 281 break; 282 if (st->notify != NULL) { 283 complete(st->notify); 284 st->notify = NULL; 285 } 286 #ifdef MISDN_MSG_STATS 287 st->sleep_cnt++; 288 #endif 289 test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status); 290 wait_event_interruptible(st->workq, (st->status & 291 mISDN_STACK_ACTION_MASK)); 292 if (*debug & DEBUG_MSG_THREAD) 293 printk(KERN_DEBUG "%s: %s wake status %08lx\n", 294 __func__, dev_name(&st->dev->dev), st->status); 295 test_and_set_bit(mISDN_STACK_ACTIVE, &st->status); 296 297 test_and_clear_bit(mISDN_STACK_WAKEUP, &st->status); 298 299 if (test_bit(mISDN_STACK_STOPPED, &st->status)) { 300 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); 301 #ifdef MISDN_MSG_STATS 302 st->stopped_cnt++; 303 #endif 304 } 305 } 306 #ifdef MISDN_MSG_STATS 307 printk(KERN_DEBUG "mISDNStackd daemon for %s proceed %d " 308 "msg %d sleep %d stopped\n", 309 dev_name(&st->dev->dev), st->msg_cnt, st->sleep_cnt, 310 st->stopped_cnt); 311 printk(KERN_DEBUG 312 "mISDNStackd daemon for %s utime(%ld) stime(%ld)\n", 313 dev_name(&st->dev->dev), st->thread->utime, st->thread->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