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/smp_lock.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 ch%d mgr prim(%x) addr(%x) err %d\n", 140 __func__, ch->nr, hh->prim, ch->addr, 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 int err = 0; 207 208 #ifdef CONFIG_SMP 209 lock_kernel(); 210 #endif 211 sigfillset(¤t->blocked); 212 #ifdef CONFIG_SMP 213 unlock_kernel(); 214 #endif 215 if (*debug & DEBUG_MSG_THREAD) 216 printk(KERN_DEBUG "mISDNStackd %s started\n", 217 dev_name(&st->dev->dev)); 218 219 if (st->notify != NULL) { 220 complete(st->notify); 221 st->notify = NULL; 222 } 223 224 for (;;) { 225 struct sk_buff *skb; 226 227 if (unlikely(test_bit(mISDN_STACK_STOPPED, &st->status))) { 228 test_and_clear_bit(mISDN_STACK_WORK, &st->status); 229 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); 230 } else 231 test_and_set_bit(mISDN_STACK_RUNNING, &st->status); 232 while (test_bit(mISDN_STACK_WORK, &st->status)) { 233 skb = skb_dequeue(&st->msgq); 234 if (!skb) { 235 test_and_clear_bit(mISDN_STACK_WORK, 236 &st->status); 237 /* test if a race happens */ 238 skb = skb_dequeue(&st->msgq); 239 if (!skb) 240 continue; 241 test_and_set_bit(mISDN_STACK_WORK, 242 &st->status); 243 } 244 #ifdef MISDN_MSG_STATS 245 st->msg_cnt++; 246 #endif 247 err = send_msg_to_layer(st, skb); 248 if (unlikely(err)) { 249 if (*debug & DEBUG_SEND_ERR) 250 printk(KERN_DEBUG 251 "%s: %s prim(%x) id(%x) " 252 "send call(%d)\n", 253 __func__, dev_name(&st->dev->dev), 254 mISDN_HEAD_PRIM(skb), 255 mISDN_HEAD_ID(skb), err); 256 dev_kfree_skb(skb); 257 continue; 258 } 259 if (unlikely(test_bit(mISDN_STACK_STOPPED, 260 &st->status))) { 261 test_and_clear_bit(mISDN_STACK_WORK, 262 &st->status); 263 test_and_clear_bit(mISDN_STACK_RUNNING, 264 &st->status); 265 break; 266 } 267 } 268 if (test_bit(mISDN_STACK_CLEARING, &st->status)) { 269 test_and_set_bit(mISDN_STACK_STOPPED, &st->status); 270 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); 271 do_clear_stack(st); 272 test_and_clear_bit(mISDN_STACK_CLEARING, &st->status); 273 test_and_set_bit(mISDN_STACK_RESTART, &st->status); 274 } 275 if (test_and_clear_bit(mISDN_STACK_RESTART, &st->status)) { 276 test_and_clear_bit(mISDN_STACK_STOPPED, &st->status); 277 test_and_set_bit(mISDN_STACK_RUNNING, &st->status); 278 if (!skb_queue_empty(&st->msgq)) 279 test_and_set_bit(mISDN_STACK_WORK, 280 &st->status); 281 } 282 if (test_bit(mISDN_STACK_ABORT, &st->status)) 283 break; 284 if (st->notify != NULL) { 285 complete(st->notify); 286 st->notify = NULL; 287 } 288 #ifdef MISDN_MSG_STATS 289 st->sleep_cnt++; 290 #endif 291 test_and_clear_bit(mISDN_STACK_ACTIVE, &st->status); 292 wait_event_interruptible(st->workq, (st->status & 293 mISDN_STACK_ACTION_MASK)); 294 if (*debug & DEBUG_MSG_THREAD) 295 printk(KERN_DEBUG "%s: %s wake status %08lx\n", 296 __func__, dev_name(&st->dev->dev), st->status); 297 test_and_set_bit(mISDN_STACK_ACTIVE, &st->status); 298 299 test_and_clear_bit(mISDN_STACK_WAKEUP, &st->status); 300 301 if (test_bit(mISDN_STACK_STOPPED, &st->status)) { 302 test_and_clear_bit(mISDN_STACK_RUNNING, &st->status); 303 #ifdef MISDN_MSG_STATS 304 st->stopped_cnt++; 305 #endif 306 } 307 } 308 #ifdef MISDN_MSG_STATS 309 printk(KERN_DEBUG "mISDNStackd daemon for %s proceed %d " 310 "msg %d sleep %d stopped\n", 311 dev_name(&st->dev->dev), st->msg_cnt, st->sleep_cnt, 312 st->stopped_cnt); 313 printk(KERN_DEBUG 314 "mISDNStackd daemon for %s utime(%ld) stime(%ld)\n", 315 dev_name(&st->dev->dev), st->thread->utime, st->thread->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 } 665