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(¤t->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 /* fall through */ 543 case ISDN_P_LAPD_TE: 544 ch->recv = mISDN_queue_message; 545 ch->peer = &dev->D.st->own; 546 ch->st = dev->D.st; 547 rq.adr.channel = 0; 548 err = dev->D.ctrl(&dev->D, OPEN_CHANNEL, &rq); 549 printk(KERN_DEBUG "%s: ret 1 %d\n", __func__, err); 550 if (err) 551 break; 552 rq.protocol = protocol; 553 rq.adr = *adr; 554 rq.ch = ch; 555 err = dev->teimgr->ctrl(dev->teimgr, OPEN_CHANNEL, &rq); 556 printk(KERN_DEBUG "%s: ret 2 %d\n", __func__, err); 557 if (!err) { 558 if ((protocol == ISDN_P_LAPD_NT) && !rq.ch) 559 break; 560 add_layer2(rq.ch, dev->D.st); 561 rq.ch->recv = mISDN_queue_message; 562 rq.ch->peer = &dev->D.st->own; 563 rq.ch->ctrl(rq.ch, OPEN_CHANNEL, NULL); /* can't fail */ 564 } 565 break; 566 default: 567 err = -EPROTONOSUPPORT; 568 } 569 return err; 570 } 571 572 void 573 delete_channel(struct mISDNchannel *ch) 574 { 575 struct mISDN_sock *msk = container_of(ch, struct mISDN_sock, ch); 576 struct mISDNchannel *pch; 577 578 if (!ch->st) { 579 printk(KERN_WARNING "%s: no stack\n", __func__); 580 return; 581 } 582 if (*debug & DEBUG_CORE_FUNC) 583 printk(KERN_DEBUG "%s: st(%s) protocol(%x)\n", __func__, 584 dev_name(&ch->st->dev->dev), ch->protocol); 585 if (ch->protocol >= ISDN_P_B_START) { 586 if (ch->peer) { 587 ch->peer->ctrl(ch->peer, CLOSE_CHANNEL, NULL); 588 ch->peer = NULL; 589 } 590 return; 591 } 592 switch (ch->protocol) { 593 case ISDN_P_NT_S0: 594 case ISDN_P_TE_S0: 595 case ISDN_P_NT_E1: 596 case ISDN_P_TE_E1: 597 write_lock_bh(&ch->st->l1sock.lock); 598 sk_del_node_init(&msk->sk); 599 write_unlock_bh(&ch->st->l1sock.lock); 600 ch->st->dev->D.ctrl(&ch->st->dev->D, CLOSE_CHANNEL, NULL); 601 break; 602 case ISDN_P_LAPD_TE: 603 pch = get_channel4id(ch->st, ch->nr); 604 if (pch) { 605 mutex_lock(&ch->st->lmutex); 606 list_del(&pch->list); 607 mutex_unlock(&ch->st->lmutex); 608 pch->ctrl(pch, CLOSE_CHANNEL, NULL); 609 pch = ch->st->dev->teimgr; 610 pch->ctrl(pch, CLOSE_CHANNEL, NULL); 611 } else 612 printk(KERN_WARNING "%s: no l2 channel\n", 613 __func__); 614 break; 615 case ISDN_P_LAPD_NT: 616 pch = ch->st->dev->teimgr; 617 if (pch) { 618 pch->ctrl(pch, CLOSE_CHANNEL, NULL); 619 } else 620 printk(KERN_WARNING "%s: no l2 channel\n", 621 __func__); 622 break; 623 default: 624 break; 625 } 626 return; 627 } 628 629 void 630 delete_stack(struct mISDNdevice *dev) 631 { 632 struct mISDNstack *st = dev->D.st; 633 DECLARE_COMPLETION_ONSTACK(done); 634 635 if (*debug & DEBUG_CORE_FUNC) 636 printk(KERN_DEBUG "%s: st(%s)\n", __func__, 637 dev_name(&st->dev->dev)); 638 if (dev->teimgr) 639 delete_teimanager(dev->teimgr); 640 if (st->thread) { 641 if (st->notify) { 642 printk(KERN_WARNING "%s: notifier in use\n", 643 __func__); 644 complete(st->notify); 645 } 646 st->notify = &done; 647 test_and_set_bit(mISDN_STACK_ABORT, &st->status); 648 test_and_set_bit(mISDN_STACK_WAKEUP, &st->status); 649 wake_up_interruptible(&st->workq); 650 wait_for_completion(&done); 651 } 652 if (!list_empty(&st->layer2)) 653 printk(KERN_WARNING "%s: layer2 list not empty\n", 654 __func__); 655 if (!hlist_empty(&st->l1sock.head)) 656 printk(KERN_WARNING "%s: layer1 list not empty\n", 657 __func__); 658 kfree(st); 659 } 660 661 void 662 mISDN_initstack(u_int *dp) 663 { 664 debug = dp; 665 } 666