drivers/media/dvb-core/dmxdev.c

   1 /*
   2  * dmxdev.c - DVB demultiplexer device
   3  *
   4  * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
   5  *                    for convergence integrated media GmbH
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public License
   9  * as published by the Free Software Foundation; either version 2.1
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  */
  18
  19 #define pr_fmt(fmt) "dmxdev: " fmt
  20
  21 #include <linux/sched.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/slab.h>
  24 #include <linux/vmalloc.h>
  25 #include <linux/module.h>
  26 #include <linux/poll.h>
  27 #include <linux/ioctl.h>
  28 #include <linux/wait.h>
  29 #include <linux/uaccess.h>
  30 #include "dmxdev.h"
  31
  32 static int debug;
  33
  34 module_param(debug, int, 0644);
  35 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  36
  37 #define dprintk(fmt, arg...) do {                                       \
  38         if (debug)                                                      \
  39                 printk(KERN_DEBUG pr_fmt("%s: " fmt),                   \
  40                         __func__, ##arg);                               \
  41 } while (0)
  42
  43 static int dvb_dmxdev_buffer_write(struct dvb_ringbuffer *buf,
  44                                    const u8 *src, size_t len)
  45 {
  46         ssize_t free;
  47
  48         if (!len)
  49                 return 0;
  50         if (!buf->data)
  51                 return 0;
  52
  53         free = dvb_ringbuffer_free(buf);
  54         if (len > free) {
  55                 dprintk("buffer overflow\n");
  56                 return -EOVERFLOW;
  57         }
  58
  59         return dvb_ringbuffer_write(buf, src, len);
  60 }
  61
  62 static ssize_t dvb_dmxdev_buffer_read(struct dvb_ringbuffer *src,
  63                                       int non_blocking, char __user *buf,
  64                                       size_t count, loff_t *ppos)
  65 {
  66         size_t todo;
  67         ssize_t avail;
  68         ssize_t ret = 0;
  69
  70         if (!src->data)
  71                 return 0;
  72
  73         if (src->error) {
  74                 ret = src->error;
  75                 dvb_ringbuffer_flush(src);
  76                 return ret;
  77         }
  78
  79         for (todo = count; todo > 0; todo -= ret) {
  80                 if (non_blocking && dvb_ringbuffer_empty(src)) {
  81                         ret = -EWOULDBLOCK;
  82                         break;
  83                 }
  84
  85                 ret = wait_event_interruptible(src->queue,
  86                                                !dvb_ringbuffer_empty(src) ||
  87                                                (src->error != 0));
  88                 if (ret < 0)
  89                         break;
  90
  91                 if (src->error) {
  92                         ret = src->error;
  93                         dvb_ringbuffer_flush(src);
  94                         break;
  95                 }
  96
  97                 avail = dvb_ringbuffer_avail(src);
  98                 if (avail > todo)
  99                         avail = todo;
 100
 101                 ret = dvb_ringbuffer_read_user(src, buf, avail);
 102                 if (ret < 0)
 103                         break;
 104
 105                 buf += ret;
 106         }
 107
 108         return (count - todo) ? (count - todo) : ret;
 109 }
 110
 111 static struct dmx_frontend *get_fe(struct dmx_demux *demux, int type)
 112 {
 113         struct list_head *head, *pos;
 114
 115         head = demux->get_frontends(demux);
 116         if (!head)
 117                 return NULL;
 118         list_for_each(pos, head)
 119                 if (DMX_FE_ENTRY(pos)->source == type)
 120                         return DMX_FE_ENTRY(pos);
 121
 122         return NULL;
 123 }
 124
 125 static int dvb_dvr_open(struct inode *inode, struct file *file)
 126 {
 127         struct dvb_device *dvbdev = file->private_data;
 128         struct dmxdev *dmxdev = dvbdev->priv;
 129         struct dmx_frontend *front;
 130
 131         dprintk("%s\n", __func__);
 132
 133         if (mutex_lock_interruptible(&dmxdev->mutex))
 134                 return -ERESTARTSYS;
 135
 136         if (dmxdev->exit) {
 137                 mutex_unlock(&dmxdev->mutex);
 138                 return -ENODEV;
 139         }
 140
 141         if ((file->f_flags & O_ACCMODE) == O_RDWR) {
 142                 if (!(dmxdev->capabilities & DMXDEV_CAP_DUPLEX)) {
 143                         mutex_unlock(&dmxdev->mutex);
 144                         return -EOPNOTSUPP;
 145                 }
 146         }
 147
 148         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 149                 void *mem;
 150
 151                 if (!dvbdev->readers) {
 152                         mutex_unlock(&dmxdev->mutex);
 153                         return -EBUSY;
 154                 }
 155                 mem = vmalloc(DVR_BUFFER_SIZE);
 156                 if (!mem) {
 157                         mutex_unlock(&dmxdev->mutex);
 158                         return -ENOMEM;
 159                 }
 160                 dvb_ringbuffer_init(&dmxdev->dvr_buffer, mem, DVR_BUFFER_SIZE);
 161                 dvbdev->readers--;
 162         }
 163
 164         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 165                 dmxdev->dvr_orig_fe = dmxdev->demux->frontend;
 166
 167                 if (!dmxdev->demux->write) {
 168                         mutex_unlock(&dmxdev->mutex);
 169                         return -EOPNOTSUPP;
 170                 }
 171
 172                 front = get_fe(dmxdev->demux, DMX_MEMORY_FE);
 173
 174                 if (!front) {
 175                         mutex_unlock(&dmxdev->mutex);
 176                         return -EINVAL;
 177                 }
 178                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 179                 dmxdev->demux->connect_frontend(dmxdev->demux, front);
 180         }
 181         dvbdev->users++;
 182         mutex_unlock(&dmxdev->mutex);
 183         return 0;
 184 }
 185
 186 static int dvb_dvr_release(struct inode *inode, struct file *file)
 187 {
 188         struct dvb_device *dvbdev = file->private_data;
 189         struct dmxdev *dmxdev = dvbdev->priv;
 190
 191         mutex_lock(&dmxdev->mutex);
 192
 193         if ((file->f_flags & O_ACCMODE) == O_WRONLY) {
 194                 dmxdev->demux->disconnect_frontend(dmxdev->demux);
 195                 dmxdev->demux->connect_frontend(dmxdev->demux,
 196                                                 dmxdev->dvr_orig_fe);
 197         }
 198         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
 199                 dvbdev->readers++;
 200                 if (dmxdev->dvr_buffer.data) {
 201                         void *mem = dmxdev->dvr_buffer.data;
 202                         /*memory barrier*/
 203                         mb();
 204                         spin_lock_irq(&dmxdev->lock);
 205                         dmxdev->dvr_buffer.data = NULL;
 206                         spin_unlock_irq(&dmxdev->lock);
 207                         vfree(mem);
 208                 }
 209         }
 210         /* TODO */
 211         dvbdev->users--;
 212         if (dvbdev->users == 1 && dmxdev->exit == 1) {
 213                 mutex_unlock(&dmxdev->mutex);
 214                 wake_up(&dvbdev->wait_queue);
 215         } else
 216                 mutex_unlock(&dmxdev->mutex);
 217
 218         return 0;
 219 }
 220
 221 static ssize_t dvb_dvr_write(struct file *file, const char __user *buf,
 222                              size_t count, loff_t *ppos)
 223 {
 224         struct dvb_device *dvbdev = file->private_data;
 225         struct dmxdev *dmxdev = dvbdev->priv;
 226         int ret;
 227
 228         if (!dmxdev->demux->write)
 229                 return -EOPNOTSUPP;
 230         if ((file->f_flags & O_ACCMODE) != O_WRONLY)
 231                 return -EINVAL;
 232         if (mutex_lock_interruptible(&dmxdev->mutex))
 233                 return -ERESTARTSYS;
 234
 235         if (dmxdev->exit) {
 236                 mutex_unlock(&dmxdev->mutex);
 237                 return -ENODEV;
 238         }
 239         ret = dmxdev->demux->write(dmxdev->demux, buf, count);
 240         mutex_unlock(&dmxdev->mutex);
 241         return ret;
 242 }
 243
 244 static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count,
 245                             loff_t *ppos)
 246 {
 247         struct dvb_device *dvbdev = file->private_data;
 248         struct dmxdev *dmxdev = dvbdev->priv;
 249
 250         if (dmxdev->exit)
 251                 return -ENODEV;
 252
 253         return dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer,
 254                                       file->f_flags & O_NONBLOCK,
 255                                       buf, count, ppos);
 256 }
 257
 258 static int dvb_dvr_set_buffer_size(struct dmxdev *dmxdev,
 259                                       unsigned long size)
 260 {
 261         struct dvb_ringbuffer *buf = &dmxdev->dvr_buffer;
 262         void *newmem;
 263         void *oldmem;
 264
 265         dprintk("%s\n", __func__);
 266
 267         if (buf->size == size)
 268                 return 0;
 269         if (!size)
 270                 return -EINVAL;
 271
 272         newmem = vmalloc(size);
 273         if (!newmem)
 274                 return -ENOMEM;
 275
 276         oldmem = buf->data;
 277
 278         spin_lock_irq(&dmxdev->lock);
 279         buf->data = newmem;
 280         buf->size = size;
 281
 282         /* reset and not flush in case the buffer shrinks */
 283         dvb_ringbuffer_reset(buf);
 284         spin_unlock_irq(&dmxdev->lock);
 285
 286         vfree(oldmem);
 287
 288         return 0;
 289 }
 290
 291 static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter
 292                                                *dmxdevfilter, int state)
 293 {
 294         spin_lock_irq(&dmxdevfilter->dev->lock);
 295         dmxdevfilter->state = state;
 296         spin_unlock_irq(&dmxdevfilter->dev->lock);
 297 }
 298
 299 static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter,
 300                                       unsigned long size)
 301 {
 302         struct dvb_ringbuffer *buf = &dmxdevfilter->buffer;
 303         void *newmem;
 304         void *oldmem;
 305
 306         if (buf->size == size)
 307                 return 0;
 308         if (!size)
 309                 return -EINVAL;
 310         if (dmxdevfilter->state >= DMXDEV_STATE_GO)
 311                 return -EBUSY;
 312
 313         newmem = vmalloc(size);
 314         if (!newmem)
 315                 return -ENOMEM;
 316
 317         oldmem = buf->data;
 318
 319         spin_lock_irq(&dmxdevfilter->dev->lock);
 320         buf->data = newmem;
 321         buf->size = size;
 322
 323         /* reset and not flush in case the buffer shrinks */
 324         dvb_ringbuffer_reset(buf);
 325         spin_unlock_irq(&dmxdevfilter->dev->lock);
 326
 327         vfree(oldmem);
 328
 329         return 0;
 330 }
 331
 332 static void dvb_dmxdev_filter_timeout(struct timer_list *t)
 333 {
 334         struct dmxdev_filter *dmxdevfilter = from_timer(dmxdevfilter, t, timer);
 335
 336         dmxdevfilter->buffer.error = -ETIMEDOUT;
 337         spin_lock_irq(&dmxdevfilter->dev->lock);
 338         dmxdevfilter->state = DMXDEV_STATE_TIMEDOUT;
 339         spin_unlock_irq(&dmxdevfilter->dev->lock);
 340         wake_up(&dmxdevfilter->buffer.queue);
 341 }
 342
 343 static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter)
 344 {
 345         struct dmx_sct_filter_params *para = &dmxdevfilter->params.sec;
 346
 347         del_timer(&dmxdevfilter->timer);
 348         if (para->timeout) {
 349                 dmxdevfilter->timer.expires =
 350                     jiffies + 1 + (HZ / 2 + HZ * para->timeout) / 1000;
 351                 add_timer(&dmxdevfilter->timer);
 352         }
 353 }
 354
 355 static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len,
 356                                        const u8 *buffer2, size_t buffer2_len,
 357                                        struct dmx_section_filter *filter)
 358 {
 359         struct dmxdev_filter *dmxdevfilter = filter->priv;
 360         int ret;
 361
 362         if (dmxdevfilter->buffer.error) {
 363                 wake_up(&dmxdevfilter->buffer.queue);
 364                 return 0;
 365         }
 366         spin_lock(&dmxdevfilter->dev->lock);
 367         if (dmxdevfilter->state != DMXDEV_STATE_GO) {
 368                 spin_unlock(&dmxdevfilter->dev->lock);
 369                 return 0;
 370         }
 371         del_timer(&dmxdevfilter->timer);
 372         dprintk("section callback %*ph\n", 6, buffer1);
 373         ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1,
 374                                       buffer1_len);
 375         if (ret == buffer1_len) {
 376                 ret = dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2,
 377                                               buffer2_len);
 378         }
 379         if (ret < 0)
 380                 dmxdevfilter->buffer.error = ret;
 381         if (dmxdevfilter->params.sec.flags & DMX_ONESHOT)
 382                 dmxdevfilter->state = DMXDEV_STATE_DONE;
 383         spin_unlock(&dmxdevfilter->dev->lock);
 384         wake_up(&dmxdevfilter->buffer.queue);
 385         return 0;
 386 }
 387
 388 static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len,
 389                                   const u8 *buffer2, size_t buffer2_len,
 390                                   struct dmx_ts_feed *feed)
 391 {
 392         struct dmxdev_filter *dmxdevfilter = feed->priv;
 393         struct dvb_ringbuffer *buffer;
 394         int ret;
 395
 396         spin_lock(&dmxdevfilter->dev->lock);
 397         if (dmxdevfilter->params.pes.output == DMX_OUT_DECODER) {
 398                 spin_unlock(&dmxdevfilter->dev->lock);
 399                 return 0;
 400         }
 401
 402         if (dmxdevfilter->params.pes.output == DMX_OUT_TAP
 403             || dmxdevfilter->params.pes.output == DMX_OUT_TSDEMUX_TAP)
 404                 buffer = &dmxdevfilter->buffer;
 405         else
 406                 buffer = &dmxdevfilter->dev->dvr_buffer;
 407         if (buffer->error) {
 408                 spin_unlock(&dmxdevfilter->dev->lock);
 409                 wake_up(&buffer->queue);
 410                 return 0;
 411         }
 412         ret = dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len);
 413         if (ret == buffer1_len)
 414                 ret = dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len);
 415         if (ret < 0)
 416                 buffer->error = ret;
 417         spin_unlock(&dmxdevfilter->dev->lock);
 418         wake_up(&buffer->queue);
 419         return 0;
 420 }
 421
 422 /* stop feed but only mark the specified filter as stopped (state set) */
 423 static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter)
 424 {
 425         struct dmxdev_feed *feed;
 426
 427         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 428
 429         switch (dmxdevfilter->type) {
 430         case DMXDEV_TYPE_SEC:
 431                 del_timer(&dmxdevfilter->timer);
 432                 dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec);
 433                 break;
 434         case DMXDEV_TYPE_PES:
 435                 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next)
 436                         feed->ts->stop_filtering(feed->ts);
 437                 break;
 438         default:
 439                 return -EINVAL;
 440         }
 441         return 0;
 442 }
 443
 444 /* start feed associated with the specified filter */
 445 static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter)
 446 {
 447         struct dmxdev_feed *feed;
 448         int ret;
 449
 450         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 451
 452         switch (filter->type) {
 453         case DMXDEV_TYPE_SEC:
 454                 return filter->feed.sec->start_filtering(filter->feed.sec);
 455         case DMXDEV_TYPE_PES:
 456                 list_for_each_entry(feed, &filter->feed.ts, next) {
 457                         ret = feed->ts->start_filtering(feed->ts);
 458                         if (ret < 0) {
 459                                 dvb_dmxdev_feed_stop(filter);
 460                                 return ret;
 461                         }
 462                 }
 463                 break;
 464         default:
 465                 return -EINVAL;
 466         }
 467
 468         return 0;
 469 }
 470
 471 /* restart section feed if it has filters left associated with it,
 472    otherwise release the feed */
 473 static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter)
 474 {
 475         int i;
 476         struct dmxdev *dmxdev = filter->dev;
 477         u16 pid = filter->params.sec.pid;
 478
 479         for (i = 0; i < dmxdev->filternum; i++)
 480                 if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 481                     dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 482                     dmxdev->filter[i].params.sec.pid == pid) {
 483                         dvb_dmxdev_feed_start(&dmxdev->filter[i]);
 484                         return 0;
 485                 }
 486
 487         filter->dev->demux->release_section_feed(dmxdev->demux,
 488                                                  filter->feed.sec);
 489
 490         return 0;
 491 }
 492
 493 static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter)
 494 {
 495         struct dmxdev_feed *feed;
 496         struct dmx_demux *demux;
 497
 498         if (dmxdevfilter->state < DMXDEV_STATE_GO)
 499                 return 0;
 500
 501         switch (dmxdevfilter->type) {
 502         case DMXDEV_TYPE_SEC:
 503                 if (!dmxdevfilter->feed.sec)
 504                         break;
 505                 dvb_dmxdev_feed_stop(dmxdevfilter);
 506                 if (dmxdevfilter->filter.sec)
 507                         dmxdevfilter->feed.sec->
 508                             release_filter(dmxdevfilter->feed.sec,
 509                                            dmxdevfilter->filter.sec);
 510                 dvb_dmxdev_feed_restart(dmxdevfilter);
 511                 dmxdevfilter->feed.sec = NULL;
 512                 break;
 513         case DMXDEV_TYPE_PES:
 514                 dvb_dmxdev_feed_stop(dmxdevfilter);
 515                 demux = dmxdevfilter->dev->demux;
 516                 list_for_each_entry(feed, &dmxdevfilter->feed.ts, next) {
 517                         demux->release_ts_feed(demux, feed->ts);
 518                         feed->ts = NULL;
 519                 }
 520                 break;
 521         default:
 522                 if (dmxdevfilter->state == DMXDEV_STATE_ALLOCATED)
 523                         return 0;
 524                 return -EINVAL;
 525         }
 526
 527         dvb_ringbuffer_flush(&dmxdevfilter->buffer);
 528         return 0;
 529 }
 530
 531 static void dvb_dmxdev_delete_pids(struct dmxdev_filter *dmxdevfilter)
 532 {
 533         struct dmxdev_feed *feed, *tmp;
 534
 535         /* delete all PIDs */
 536         list_for_each_entry_safe(feed, tmp, &dmxdevfilter->feed.ts, next) {
 537                 list_del(&feed->next);
 538                 kfree(feed);
 539         }
 540
 541         BUG_ON(!list_empty(&dmxdevfilter->feed.ts));
 542 }
 543
 544 static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter)
 545 {
 546         if (dmxdevfilter->state < DMXDEV_STATE_SET)
 547                 return 0;
 548
 549         if (dmxdevfilter->type == DMXDEV_TYPE_PES)
 550                 dvb_dmxdev_delete_pids(dmxdevfilter);
 551
 552         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 553         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 554         return 0;
 555 }
 556
 557 static int dvb_dmxdev_start_feed(struct dmxdev *dmxdev,
 558                                  struct dmxdev_filter *filter,
 559                                  struct dmxdev_feed *feed)
 560 {
 561         ktime_t timeout = 0;
 562         struct dmx_pes_filter_params *para = &filter->params.pes;
 563         enum dmx_output otype;
 564         int ret;
 565         int ts_type;
 566         enum dmx_ts_pes ts_pes;
 567         struct dmx_ts_feed *tsfeed;
 568
 569         feed->ts = NULL;
 570         otype = para->output;
 571
 572         ts_pes = para->pes_type;
 573
 574         if (ts_pes < DMX_PES_OTHER)
 575                 ts_type = TS_DECODER;
 576         else
 577                 ts_type = 0;
 578
 579         if (otype == DMX_OUT_TS_TAP)
 580                 ts_type |= TS_PACKET;
 581         else if (otype == DMX_OUT_TSDEMUX_TAP)
 582                 ts_type |= TS_PACKET | TS_DEMUX;
 583         else if (otype == DMX_OUT_TAP)
 584                 ts_type |= TS_PACKET | TS_DEMUX | TS_PAYLOAD_ONLY;
 585
 586         ret = dmxdev->demux->allocate_ts_feed(dmxdev->demux, &feed->ts,
 587                                               dvb_dmxdev_ts_callback);
 588         if (ret < 0)
 589                 return ret;
 590
 591         tsfeed = feed->ts;
 592         tsfeed->priv = filter;
 593
 594         ret = tsfeed->set(tsfeed, feed->pid, ts_type, ts_pes, timeout);
 595         if (ret < 0) {
 596                 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
 597                 return ret;
 598         }
 599
 600         ret = tsfeed->start_filtering(tsfeed);
 601         if (ret < 0) {
 602                 dmxdev->demux->release_ts_feed(dmxdev->demux, tsfeed);
 603                 return ret;
 604         }
 605
 606         return 0;
 607 }
 608
 609 static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter)
 610 {
 611         struct dmxdev *dmxdev = filter->dev;
 612         struct dmxdev_feed *feed;
 613         void *mem;
 614         int ret, i;
 615
 616         if (filter->state < DMXDEV_STATE_SET)
 617                 return -EINVAL;
 618
 619         if (filter->state >= DMXDEV_STATE_GO)
 620                 dvb_dmxdev_filter_stop(filter);
 621
 622         if (!filter->buffer.data) {
 623                 mem = vmalloc(filter->buffer.size);
 624                 if (!mem)
 625                         return -ENOMEM;
 626                 spin_lock_irq(&filter->dev->lock);
 627                 filter->buffer.data = mem;
 628                 spin_unlock_irq(&filter->dev->lock);
 629         }
 630
 631         dvb_ringbuffer_flush(&filter->buffer);
 632
 633         switch (filter->type) {
 634         case DMXDEV_TYPE_SEC:
 635         {
 636                 struct dmx_sct_filter_params *para = &filter->params.sec;
 637                 struct dmx_section_filter **secfilter = &filter->filter.sec;
 638                 struct dmx_section_feed **secfeed = &filter->feed.sec;
 639
 640                 *secfilter = NULL;
 641                 *secfeed = NULL;
 642
 643
 644                 /* find active filter/feed with same PID */
 645                 for (i = 0; i < dmxdev->filternum; i++) {
 646                         if (dmxdev->filter[i].state >= DMXDEV_STATE_GO &&
 647                             dmxdev->filter[i].type == DMXDEV_TYPE_SEC &&
 648                             dmxdev->filter[i].params.sec.pid == para->pid) {
 649                                 *secfeed = dmxdev->filter[i].feed.sec;
 650                                 break;
 651                         }
 652                 }
 653
 654                 /* if no feed found, try to allocate new one */
 655                 if (!*secfeed) {
 656                         ret = dmxdev->demux->allocate_section_feed(dmxdev->demux,
 657                                                                    secfeed,
 658                                                                    dvb_dmxdev_section_callback);
 659                         if (ret < 0) {
 660                                 pr_err("DVB (%s): could not alloc feed\n",
 661                                        __func__);
 662                                 return ret;
 663                         }
 664
 665                         ret = (*secfeed)->set(*secfeed, para->pid,
 666                                               (para->flags & DMX_CHECK_CRC) ? 1 : 0);
 667                         if (ret < 0) {
 668                                 pr_err("DVB (%s): could not set feed\n",
 669                                        __func__);
 670                                 dvb_dmxdev_feed_restart(filter);
 671                                 return ret;
 672                         }
 673                 } else {
 674                         dvb_dmxdev_feed_stop(filter);
 675                 }
 676
 677                 ret = (*secfeed)->allocate_filter(*secfeed, secfilter);
 678                 if (ret < 0) {
 679                         dvb_dmxdev_feed_restart(filter);
 680                         filter->feed.sec->start_filtering(*secfeed);
 681                         dprintk("could not get filter\n");
 682                         return ret;
 683                 }
 684
 685                 (*secfilter)->priv = filter;
 686
 687                 memcpy(&((*secfilter)->filter_value[3]),
 688                        &(para->filter.filter[1]), DMX_FILTER_SIZE - 1);
 689                 memcpy(&(*secfilter)->filter_mask[3],
 690                        &para->filter.mask[1], DMX_FILTER_SIZE - 1);
 691                 memcpy(&(*secfilter)->filter_mode[3],
 692                        &para->filter.mode[1], DMX_FILTER_SIZE - 1);
 693
 694                 (*secfilter)->filter_value[0] = para->filter.filter[0];
 695                 (*secfilter)->filter_mask[0] = para->filter.mask[0];
 696                 (*secfilter)->filter_mode[0] = para->filter.mode[0];
 697                 (*secfilter)->filter_mask[1] = 0;
 698                 (*secfilter)->filter_mask[2] = 0;
 699
 700                 filter->todo = 0;
 701
 702                 ret = filter->feed.sec->start_filtering(filter->feed.sec);
 703                 if (ret < 0)
 704                         return ret;
 705
 706                 dvb_dmxdev_filter_timer(filter);
 707                 break;
 708         }
 709         case DMXDEV_TYPE_PES:
 710                 list_for_each_entry(feed, &filter->feed.ts, next) {
 711                         ret = dvb_dmxdev_start_feed(dmxdev, filter, feed);
 712                         if (ret < 0) {
 713                                 dvb_dmxdev_filter_stop(filter);
 714                                 return ret;
 715                         }
 716                 }
 717                 break;
 718         default:
 719                 return -EINVAL;
 720         }
 721
 722         dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO);
 723         return 0;
 724 }
 725
 726 static int dvb_demux_open(struct inode *inode, struct file *file)
 727 {
 728         struct dvb_device *dvbdev = file->private_data;
 729         struct dmxdev *dmxdev = dvbdev->priv;
 730         int i;
 731         struct dmxdev_filter *dmxdevfilter;
 732
 733         if (!dmxdev->filter)
 734                 return -EINVAL;
 735
 736         if (mutex_lock_interruptible(&dmxdev->mutex))
 737                 return -ERESTARTSYS;
 738
 739         for (i = 0; i < dmxdev->filternum; i++)
 740                 if (dmxdev->filter[i].state == DMXDEV_STATE_FREE)
 741                         break;
 742
 743         if (i == dmxdev->filternum) {
 744                 mutex_unlock(&dmxdev->mutex);
 745                 return -EMFILE;
 746         }
 747
 748         dmxdevfilter = &dmxdev->filter[i];
 749         mutex_init(&dmxdevfilter->mutex);
 750         file->private_data = dmxdevfilter;
 751
 752         dvb_ringbuffer_init(&dmxdevfilter->buffer, NULL, 8192);
 753         dmxdevfilter->type = DMXDEV_TYPE_NONE;
 754         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED);
 755         timer_setup(&dmxdevfilter->timer, dvb_dmxdev_filter_timeout, 0);
 756
 757         dvbdev->users++;
 758
 759         mutex_unlock(&dmxdev->mutex);
 760         return 0;
 761 }
 762
 763 static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev,
 764                                   struct dmxdev_filter *dmxdevfilter)
 765 {
 766         mutex_lock(&dmxdev->mutex);
 767         mutex_lock(&dmxdevfilter->mutex);
 768
 769         dvb_dmxdev_filter_stop(dmxdevfilter);
 770         dvb_dmxdev_filter_reset(dmxdevfilter);
 771
 772         if (dmxdevfilter->buffer.data) {
 773                 void *mem = dmxdevfilter->buffer.data;
 774
 775                 spin_lock_irq(&dmxdev->lock);
 776                 dmxdevfilter->buffer.data = NULL;
 777                 spin_unlock_irq(&dmxdev->lock);
 778                 vfree(mem);
 779         }
 780
 781         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE);
 782         wake_up(&dmxdevfilter->buffer.queue);
 783         mutex_unlock(&dmxdevfilter->mutex);
 784         mutex_unlock(&dmxdev->mutex);
 785         return 0;
 786 }
 787
 788 static inline void invert_mode(struct dmx_filter *filter)
 789 {
 790         int i;
 791
 792         for (i = 0; i < DMX_FILTER_SIZE; i++)
 793                 filter->mode[i] ^= 0xff;
 794 }
 795
 796 static int dvb_dmxdev_add_pid(struct dmxdev *dmxdev,
 797                               struct dmxdev_filter *filter, u16 pid)
 798 {
 799         struct dmxdev_feed *feed;
 800
 801         if ((filter->type != DMXDEV_TYPE_PES) ||
 802             (filter->state < DMXDEV_STATE_SET))
 803                 return -EINVAL;
 804
 805         /* only TS packet filters may have multiple PIDs */
 806         if ((filter->params.pes.output != DMX_OUT_TSDEMUX_TAP) &&
 807             (!list_empty(&filter->feed.ts)))
 808                 return -EINVAL;
 809
 810         feed = kzalloc(sizeof(struct dmxdev_feed), GFP_KERNEL);
 811         if (feed == NULL)
 812                 return -ENOMEM;
 813
 814         feed->pid = pid;
 815         list_add(&feed->next, &filter->feed.ts);
 816
 817         if (filter->state >= DMXDEV_STATE_GO)
 818                 return dvb_dmxdev_start_feed(dmxdev, filter, feed);
 819
 820         return 0;
 821 }
 822
 823 static int dvb_dmxdev_remove_pid(struct dmxdev *dmxdev,
 824                                   struct dmxdev_filter *filter, u16 pid)
 825 {
 826         struct dmxdev_feed *feed, *tmp;
 827
 828         if ((filter->type != DMXDEV_TYPE_PES) ||
 829             (filter->state < DMXDEV_STATE_SET))
 830                 return -EINVAL;
 831
 832         list_for_each_entry_safe(feed, tmp, &filter->feed.ts, next) {
 833                 if ((feed->pid == pid) && (feed->ts != NULL)) {
 834                         feed->ts->stop_filtering(feed->ts);
 835                         filter->dev->demux->release_ts_feed(filter->dev->demux,
 836                                                             feed->ts);
 837                         list_del(&feed->next);
 838                         kfree(feed);
 839                 }
 840         }
 841
 842         return 0;
 843 }
 844
 845 static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev,
 846                                  struct dmxdev_filter *dmxdevfilter,
 847                                  struct dmx_sct_filter_params *params)
 848 {
 849         dprintk("%s: PID=0x%04x, flags=%02x, timeout=%d\n",
 850                 __func__, params->pid, params->flags, params->timeout);
 851
 852         dvb_dmxdev_filter_stop(dmxdevfilter);
 853
 854         dmxdevfilter->type = DMXDEV_TYPE_SEC;
 855         memcpy(&dmxdevfilter->params.sec,
 856                params, sizeof(struct dmx_sct_filter_params));
 857         invert_mode(&dmxdevfilter->params.sec.filter);
 858         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 859
 860         if (params->flags & DMX_IMMEDIATE_START)
 861                 return dvb_dmxdev_filter_start(dmxdevfilter);
 862
 863         return 0;
 864 }
 865
 866 static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev,
 867                                      struct dmxdev_filter *dmxdevfilter,
 868                                      struct dmx_pes_filter_params *params)
 869 {
 870         int ret;
 871
 872         dvb_dmxdev_filter_stop(dmxdevfilter);
 873         dvb_dmxdev_filter_reset(dmxdevfilter);
 874
 875         if ((unsigned int)params->pes_type > DMX_PES_OTHER)
 876                 return -EINVAL;
 877
 878         dmxdevfilter->type = DMXDEV_TYPE_PES;
 879         memcpy(&dmxdevfilter->params, params,
 880                sizeof(struct dmx_pes_filter_params));
 881         INIT_LIST_HEAD(&dmxdevfilter->feed.ts);
 882
 883         dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET);
 884
 885         ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter,
 886                                  dmxdevfilter->params.pes.pid);
 887         if (ret < 0)
 888                 return ret;
 889
 890         if (params->flags & DMX_IMMEDIATE_START)
 891                 return dvb_dmxdev_filter_start(dmxdevfilter);
 892
 893         return 0;
 894 }
 895
 896 static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil,
 897                                    struct file *file, char __user *buf,
 898                                    size_t count, loff_t *ppos)
 899 {
 900         int result, hcount;
 901         int done = 0;
 902
 903         if (dfil->todo <= 0) {
 904                 hcount = 3 + dfil->todo;
 905                 if (hcount > count)
 906                         hcount = count;
 907                 result = dvb_dmxdev_buffer_read(&dfil->buffer,
 908                                                 file->f_flags & O_NONBLOCK,
 909                                                 buf, hcount, ppos);
 910                 if (result < 0) {
 911                         dfil->todo = 0;
 912                         return result;
 913                 }
 914                 if (copy_from_user(dfil->secheader - dfil->todo, buf, result))
 915                         return -EFAULT;
 916                 buf += result;
 917                 done = result;
 918                 count -= result;
 919                 dfil->todo -= result;
 920                 if (dfil->todo > -3)
 921                         return done;
 922                 dfil->todo = ((dfil->secheader[1] << 8) | dfil->secheader[2]) & 0xfff;
 923                 if (!count)
 924                         return done;
 925         }
 926         if (count > dfil->todo)
 927                 count = dfil->todo;
 928         result = dvb_dmxdev_buffer_read(&dfil->buffer,
 929                                         file->f_flags & O_NONBLOCK,
 930                                         buf, count, ppos);
 931         if (result < 0)
 932                 return result;
 933         dfil->todo -= result;
 934         return (result + done);
 935 }
 936
 937 static ssize_t
 938 dvb_demux_read(struct file *file, char __user *buf, size_t count,
 939                loff_t *ppos)
 940 {
 941         struct dmxdev_filter *dmxdevfilter = file->private_data;
 942         int ret;
 943
 944         if (mutex_lock_interruptible(&dmxdevfilter->mutex))
 945                 return -ERESTARTSYS;
 946
 947         if (dmxdevfilter->type == DMXDEV_TYPE_SEC)
 948                 ret = dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos);
 949         else
 950                 ret = dvb_dmxdev_buffer_read(&dmxdevfilter->buffer,
 951                                              file->f_flags & O_NONBLOCK,
 952                                              buf, count, ppos);
 953
 954         mutex_unlock(&dmxdevfilter->mutex);
 955         return ret;
 956 }
 957
 958 static int dvb_demux_do_ioctl(struct file *file,
 959                               unsigned int cmd, void *parg)
 960 {
 961         struct dmxdev_filter *dmxdevfilter = file->private_data;
 962         struct dmxdev *dmxdev = dmxdevfilter->dev;
 963         unsigned long arg = (unsigned long)parg;
 964         int ret = 0;
 965
 966         if (mutex_lock_interruptible(&dmxdev->mutex))
 967                 return -ERESTARTSYS;
 968
 969         switch (cmd) {
 970         case DMX_START:
 971                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 972                         mutex_unlock(&dmxdev->mutex);
 973                         return -ERESTARTSYS;
 974                 }
 975                 if (dmxdevfilter->state < DMXDEV_STATE_SET)
 976                         ret = -EINVAL;
 977                 else
 978                         ret = dvb_dmxdev_filter_start(dmxdevfilter);
 979                 mutex_unlock(&dmxdevfilter->mutex);
 980                 break;
 981
 982         case DMX_STOP:
 983                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 984                         mutex_unlock(&dmxdev->mutex);
 985                         return -ERESTARTSYS;
 986                 }
 987                 ret = dvb_dmxdev_filter_stop(dmxdevfilter);
 988                 mutex_unlock(&dmxdevfilter->mutex);
 989                 break;
 990
 991         case DMX_SET_FILTER:
 992                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
 993                         mutex_unlock(&dmxdev->mutex);
 994                         return -ERESTARTSYS;
 995                 }
 996                 ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, parg);
 997                 mutex_unlock(&dmxdevfilter->mutex);
 998                 break;
 999
1000         case DMX_SET_PES_FILTER:
1001                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1002                         mutex_unlock(&dmxdev->mutex);
1003                         return -ERESTARTSYS;
1004                 }
1005                 ret = dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, parg);
1006                 mutex_unlock(&dmxdevfilter->mutex);
1007                 break;
1008
1009         case DMX_SET_BUFFER_SIZE:
1010                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1011                         mutex_unlock(&dmxdev->mutex);
1012                         return -ERESTARTSYS;
1013                 }
1014                 ret = dvb_dmxdev_set_buffer_size(dmxdevfilter, arg);
1015                 mutex_unlock(&dmxdevfilter->mutex);
1016                 break;
1017
1018         case DMX_GET_PES_PIDS:
1019                 if (!dmxdev->demux->get_pes_pids) {
1020                         ret = -EINVAL;
1021                         break;
1022                 }
1023                 dmxdev->demux->get_pes_pids(dmxdev->demux, parg);
1024                 break;
1025
1026         case DMX_GET_STC:
1027                 if (!dmxdev->demux->get_stc) {
1028                         ret = -EINVAL;
1029                         break;
1030                 }
1031                 ret = dmxdev->demux->get_stc(dmxdev->demux,
1032                                              ((struct dmx_stc *)parg)->num,
1033                                              &((struct dmx_stc *)parg)->stc,
1034                                              &((struct dmx_stc *)parg)->base);
1035                 break;
1036
1037         case DMX_ADD_PID:
1038                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1039                         ret = -ERESTARTSYS;
1040                         break;
1041                 }
1042                 ret = dvb_dmxdev_add_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1043                 mutex_unlock(&dmxdevfilter->mutex);
1044                 break;
1045
1046         case DMX_REMOVE_PID:
1047                 if (mutex_lock_interruptible(&dmxdevfilter->mutex)) {
1048                         ret = -ERESTARTSYS;
1049                         break;
1050                 }
1051                 ret = dvb_dmxdev_remove_pid(dmxdev, dmxdevfilter, *(u16 *)parg);
1052                 mutex_unlock(&dmxdevfilter->mutex);
1053                 break;
1054
1055         default:
1056                 ret = -EINVAL;
1057                 break;
1058         }
1059         mutex_unlock(&dmxdev->mutex);
1060         return ret;
1061 }
1062
1063 static long dvb_demux_ioctl(struct file *file, unsigned int cmd,
1064                             unsigned long arg)
1065 {
1066         return dvb_usercopy(file, cmd, arg, dvb_demux_do_ioctl);
1067 }
1068
1069 static __poll_t dvb_demux_poll(struct file *file, poll_table *wait)
1070 {
1071         struct dmxdev_filter *dmxdevfilter = file->private_data;
1072         __poll_t mask = 0;
1073
1074         if ((!dmxdevfilter) || dmxdevfilter->dev->exit)
1075                 return POLLERR;
1076
1077         poll_wait(file, &dmxdevfilter->buffer.queue, wait);
1078
1079         if (dmxdevfilter->state != DMXDEV_STATE_GO &&
1080             dmxdevfilter->state != DMXDEV_STATE_DONE &&
1081             dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT)
1082                 return 0;
1083
1084         if (dmxdevfilter->buffer.error)
1085                 mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1086
1087         if (!dvb_ringbuffer_empty(&dmxdevfilter->buffer))
1088                 mask |= (POLLIN | POLLRDNORM | POLLPRI);
1089
1090         return mask;
1091 }
1092
1093 static int dvb_demux_release(struct inode *inode, struct file *file)
1094 {
1095         struct dmxdev_filter *dmxdevfilter = file->private_data;
1096         struct dmxdev *dmxdev = dmxdevfilter->dev;
1097
1098         int ret;
1099
1100         ret = dvb_dmxdev_filter_free(dmxdev, dmxdevfilter);
1101
1102         mutex_lock(&dmxdev->mutex);
1103         dmxdev->dvbdev->users--;
1104         if (dmxdev->dvbdev->users == 1 && dmxdev->exit == 1) {
1105                 mutex_unlock(&dmxdev->mutex);
1106                 wake_up(&dmxdev->dvbdev->wait_queue);
1107         } else
1108                 mutex_unlock(&dmxdev->mutex);
1109
1110         return ret;
1111 }
1112
1113 static const struct file_operations dvb_demux_fops = {
1114         .owner = THIS_MODULE,
1115         .read = dvb_demux_read,
1116         .unlocked_ioctl = dvb_demux_ioctl,
1117         .open = dvb_demux_open,
1118         .release = dvb_demux_release,
1119         .poll = dvb_demux_poll,
1120         .llseek = default_llseek,
1121 };
1122
1123 static const struct dvb_device dvbdev_demux = {
1124         .priv = NULL,
1125         .users = 1,
1126         .writers = 1,
1127 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1128         .name = "dvb-demux",
1129 #endif
1130         .fops = &dvb_demux_fops
1131 };
1132
1133 static int dvb_dvr_do_ioctl(struct file *file,
1134                             unsigned int cmd, void *parg)
1135 {
1136         struct dvb_device *dvbdev = file->private_data;
1137         struct dmxdev *dmxdev = dvbdev->priv;
1138         unsigned long arg = (unsigned long)parg;
1139         int ret;
1140
1141         if (mutex_lock_interruptible(&dmxdev->mutex))
1142                 return -ERESTARTSYS;
1143
1144         switch (cmd) {
1145         case DMX_SET_BUFFER_SIZE:
1146                 ret = dvb_dvr_set_buffer_size(dmxdev, arg);
1147                 break;
1148
1149         default:
1150                 ret = -EINVAL;
1151                 break;
1152         }
1153         mutex_unlock(&dmxdev->mutex);
1154         return ret;
1155 }
1156
1157 static long dvb_dvr_ioctl(struct file *file,
1158                          unsigned int cmd, unsigned long arg)
1159 {
1160         return dvb_usercopy(file, cmd, arg, dvb_dvr_do_ioctl);
1161 }
1162
1163 static __poll_t dvb_dvr_poll(struct file *file, poll_table *wait)
1164 {
1165         struct dvb_device *dvbdev = file->private_data;
1166         struct dmxdev *dmxdev = dvbdev->priv;
1167         __poll_t mask = 0;
1168
1169         dprintk("%s\n", __func__);
1170
1171         if (dmxdev->exit)
1172                 return POLLERR;
1173
1174         poll_wait(file, &dmxdev->dvr_buffer.queue, wait);
1175
1176         if ((file->f_flags & O_ACCMODE) == O_RDONLY) {
1177                 if (dmxdev->dvr_buffer.error)
1178                         mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR);
1179
1180                 if (!dvb_ringbuffer_empty(&dmxdev->dvr_buffer))
1181                         mask |= (POLLIN | POLLRDNORM | POLLPRI);
1182         } else
1183                 mask |= (POLLOUT | POLLWRNORM | POLLPRI);
1184
1185         return mask;
1186 }
1187
1188 static const struct file_operations dvb_dvr_fops = {
1189         .owner = THIS_MODULE,
1190         .read = dvb_dvr_read,
1191         .write = dvb_dvr_write,
1192         .unlocked_ioctl = dvb_dvr_ioctl,
1193         .open = dvb_dvr_open,
1194         .release = dvb_dvr_release,
1195         .poll = dvb_dvr_poll,
1196         .llseek = default_llseek,
1197 };
1198
1199 static const struct dvb_device dvbdev_dvr = {
1200         .priv = NULL,
1201         .readers = 1,
1202         .users = 1,
1203 #if defined(CONFIG_MEDIA_CONTROLLER_DVB)
1204         .name = "dvb-dvr",
1205 #endif
1206         .fops = &dvb_dvr_fops
1207 };
1208 int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter)
1209 {
1210         int i;
1211
1212         if (dmxdev->demux->open(dmxdev->demux) < 0)
1213                 return -EUSERS;
1214
1215         dmxdev->filter = vmalloc(dmxdev->filternum * sizeof(struct dmxdev_filter));
1216         if (!dmxdev->filter)
1217                 return -ENOMEM;
1218
1219         mutex_init(&dmxdev->mutex);
1220         spin_lock_init(&dmxdev->lock);
1221         for (i = 0; i < dmxdev->filternum; i++) {
1222                 dmxdev->filter[i].dev = dmxdev;
1223                 dmxdev->filter[i].buffer.data = NULL;
1224                 dvb_dmxdev_filter_state_set(&dmxdev->filter[i],
1225                                             DMXDEV_STATE_FREE);
1226         }
1227
1228         dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev,
1229                             DVB_DEVICE_DEMUX, dmxdev->filternum);
1230         dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr,
1231                             dmxdev, DVB_DEVICE_DVR, dmxdev->filternum);
1232
1233         dvb_ringbuffer_init(&dmxdev->dvr_buffer, NULL, 8192);
1234
1235         return 0;
1236 }
1237
1238 EXPORT_SYMBOL(dvb_dmxdev_init);
1239
1240 void dvb_dmxdev_release(struct dmxdev *dmxdev)
1241 {
1242         dmxdev->exit = 1;
1243         if (dmxdev->dvbdev->users > 1) {
1244                 wait_event(dmxdev->dvbdev->wait_queue,
1245                                 dmxdev->dvbdev->users == 1);
1246         }
1247         if (dmxdev->dvr_dvbdev->users > 1) {
1248                 wait_event(dmxdev->dvr_dvbdev->wait_queue,
1249                                 dmxdev->dvr_dvbdev->users == 1);
1250         }
1251
1252         dvb_unregister_device(dmxdev->dvbdev);
1253         dvb_unregister_device(dmxdev->dvr_dvbdev);
1254
1255         vfree(dmxdev->filter);
1256         dmxdev->filter = NULL;
1257         dmxdev->demux->close(dmxdev->demux);
1258 }
1259
1260 EXPORT_SYMBOL(dvb_dmxdev_release);