drivers/net/wireless/iwmc3200wifi/debugfs.c

   1 /*
   2  * Intel Wireless Multicomm 3200 WiFi driver
   3  *
   4  * Copyright (C) 2009 Intel Corporation <ilw@linux.intel.com>
   5  * Samuel Ortiz <samuel.ortiz@intel.com>
   6  * Zhu Yi <yi.zhu@intel.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License version
  10  * 2 as published by the Free Software Foundation.
  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  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  20  * 02110-1301, USA.
  21  *
  22  */
  23
  24 #include <linux/slab.h>
  25 #include <linux/kernel.h>
  26 #include <linux/bitops.h>
  27 #include <linux/debugfs.h>
  28
  29 #include "iwm.h"
  30 #include "bus.h"
  31 #include "rx.h"
  32 #include "debug.h"
  33
  34 static struct {
  35         u8 id;
  36         char *name;
  37 } iwm_debug_module[__IWM_DM_NR] = {
  38          {IWM_DM_BOOT, "boot"},
  39          {IWM_DM_FW,   "fw"},
  40          {IWM_DM_SDIO, "sdio"},
  41          {IWM_DM_NTF,  "ntf"},
  42          {IWM_DM_RX,   "rx"},
  43          {IWM_DM_TX,   "tx"},
  44          {IWM_DM_MLME, "mlme"},
  45          {IWM_DM_CMD,  "cmd"},
  46          {IWM_DM_WEXT,  "wext"},
  47 };
  48
  49 #define add_dbg_module(dbg, name, id, initlevel)        \
  50 do {                                                    \
  51         struct dentry *d;                               \
  52         dbg.dbg_module[id] = (initlevel);               \
  53         d = debugfs_create_x8(name, 0600, dbg.dbgdir,   \
  54                              &(dbg.dbg_module[id]));    \
  55         if (!IS_ERR(d))                                 \
  56                 dbg.dbg_module_dentries[id] = d;        \
  57 } while (0)
  58
  59 static int iwm_debugfs_u32_read(void *data, u64 *val)
  60 {
  61         struct iwm_priv *iwm = data;
  62
  63         *val = iwm->dbg.dbg_level;
  64         return 0;
  65 }
  66
  67 static int iwm_debugfs_dbg_level_write(void *data, u64 val)
  68 {
  69         struct iwm_priv *iwm = data;
  70         int i;
  71
  72         iwm->dbg.dbg_level = val;
  73
  74         for (i = 0; i < __IWM_DM_NR; i++)
  75                 iwm->dbg.dbg_module[i] = val;
  76
  77         return 0;
  78 }
  79 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_level,
  80                         iwm_debugfs_u32_read, iwm_debugfs_dbg_level_write,
  81                         "%llu\n");
  82
  83 static int iwm_debugfs_dbg_modules_write(void *data, u64 val)
  84 {
  85         struct iwm_priv *iwm = data;
  86         int i, bit;
  87
  88         iwm->dbg.dbg_modules = val;
  89
  90         for (i = 0; i < __IWM_DM_NR; i++)
  91                 iwm->dbg.dbg_module[i] = 0;
  92
  93         for_each_set_bit(bit, &iwm->dbg.dbg_modules, __IWM_DM_NR)
  94                 iwm->dbg.dbg_module[bit] = iwm->dbg.dbg_level;
  95
  96         return 0;
  97 }
  98 DEFINE_SIMPLE_ATTRIBUTE(fops_iwm_dbg_modules,
  99                         iwm_debugfs_u32_read, iwm_debugfs_dbg_modules_write,
 100                         "%llu\n");
 101
 102 static int iwm_generic_open(struct inode *inode, struct file *filp)
 103 {
 104         filp->private_data = inode->i_private;
 105         return 0;
 106 }
 107
 108
 109 static ssize_t iwm_debugfs_txq_read(struct file *filp, char __user *buffer,
 110                                    size_t count, loff_t *ppos)
 111 {
 112         struct iwm_priv *iwm = filp->private_data;
 113         char *buf;
 114         int i, buf_len = 4096;
 115         size_t len = 0;
 116         ssize_t ret;
 117
 118         if (*ppos != 0)
 119                 return 0;
 120         if (count < sizeof(buf))
 121                 return -ENOSPC;
 122
 123         buf = kzalloc(buf_len, GFP_KERNEL);
 124         if (!buf)
 125                 return -ENOMEM;
 126
 127         for (i = 0; i < IWM_TX_QUEUES; i++) {
 128                 struct iwm_tx_queue *txq = &iwm->txq[i];
 129                 struct sk_buff *skb;
 130                 int j;
 131                 unsigned long flags;
 132
 133                 spin_lock_irqsave(&txq->queue.lock, flags);
 134
 135                 skb = (struct sk_buff *)&txq->queue;
 136
 137                 len += snprintf(buf + len, buf_len - len, "TXQ #%d\n", i);
 138                 len += snprintf(buf + len, buf_len - len, "\tStopped:     %d\n",
 139                                 __netif_subqueue_stopped(iwm_to_ndev(iwm),
 140                                                          txq->id));
 141                 len += snprintf(buf + len, buf_len - len, "\tConcat count:%d\n",
 142                                 txq->concat_count);
 143                 len += snprintf(buf + len, buf_len - len, "\tQueue len:   %d\n",
 144                                 skb_queue_len(&txq->queue));
 145                 for (j = 0; j < skb_queue_len(&txq->queue); j++) {
 146                         struct iwm_tx_info *tx_info;
 147
 148                         skb = skb->next;
 149                         tx_info = skb_to_tx_info(skb);
 150
 151                         len += snprintf(buf + len, buf_len - len,
 152                                         "\tSKB #%d\n", j);
 153                         len += snprintf(buf + len, buf_len - len,
 154                                         "\t\tsta:   %d\n", tx_info->sta);
 155                         len += snprintf(buf + len, buf_len - len,
 156                                         "\t\tcolor: %d\n", tx_info->color);
 157                         len += snprintf(buf + len, buf_len - len,
 158                                         "\t\ttid:   %d\n", tx_info->tid);
 159                 }
 160
 161                 spin_unlock_irqrestore(&txq->queue.lock, flags);
 162
 163                 spin_lock_irqsave(&txq->stopped_queue.lock, flags);
 164
 165                 len += snprintf(buf + len, buf_len - len,
 166                                 "\tStopped Queue len:   %d\n",
 167                                 skb_queue_len(&txq->stopped_queue));
 168                 for (j = 0; j < skb_queue_len(&txq->stopped_queue); j++) {
 169                         struct iwm_tx_info *tx_info;
 170
 171                         skb = skb->next;
 172                         tx_info = skb_to_tx_info(skb);
 173
 174                         len += snprintf(buf + len, buf_len - len,
 175                                         "\tSKB #%d\n", j);
 176                         len += snprintf(buf + len, buf_len - len,
 177                                         "\t\tsta:   %d\n", tx_info->sta);
 178                         len += snprintf(buf + len, buf_len - len,
 179                                         "\t\tcolor: %d\n", tx_info->color);
 180                         len += snprintf(buf + len, buf_len - len,
 181                                         "\t\ttid:   %d\n", tx_info->tid);
 182                 }
 183
 184                 spin_unlock_irqrestore(&txq->stopped_queue.lock, flags);
 185         }
 186
 187         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 188         kfree(buf);
 189
 190         return ret;
 191 }
 192
 193 static ssize_t iwm_debugfs_tx_credit_read(struct file *filp,
 194                                           char __user *buffer,
 195                                           size_t count, loff_t *ppos)
 196 {
 197         struct iwm_priv *iwm = filp->private_data;
 198         struct iwm_tx_credit *credit = &iwm->tx_credit;
 199         char *buf;
 200         int i, buf_len = 4096;
 201         size_t len = 0;
 202         ssize_t ret;
 203
 204         if (*ppos != 0)
 205                 return 0;
 206         if (count < sizeof(buf))
 207                 return -ENOSPC;
 208
 209         buf = kzalloc(buf_len, GFP_KERNEL);
 210         if (!buf)
 211                 return -ENOMEM;
 212
 213         len += snprintf(buf + len, buf_len - len,
 214                         "NR pools:  %d\n", credit->pool_nr);
 215         len += snprintf(buf + len, buf_len - len,
 216                         "pools map: 0x%lx\n", credit->full_pools_map);
 217
 218         len += snprintf(buf + len, buf_len - len, "\n### POOLS ###\n");
 219         for (i = 0; i < IWM_MACS_OUT_GROUPS; i++) {
 220                 len += snprintf(buf + len, buf_len - len,
 221                                 "pools entry #%d\n", i);
 222                 len += snprintf(buf + len, buf_len - len,
 223                                 "\tid:          %d\n",
 224                                 credit->pools[i].id);
 225                 len += snprintf(buf + len, buf_len - len,
 226                                 "\tsid:         %d\n",
 227                                 credit->pools[i].sid);
 228                 len += snprintf(buf + len, buf_len - len,
 229                                 "\tmin_pages:   %d\n",
 230                                 credit->pools[i].min_pages);
 231                 len += snprintf(buf + len, buf_len - len,
 232                                 "\tmax_pages:   %d\n",
 233                                 credit->pools[i].max_pages);
 234                 len += snprintf(buf + len, buf_len - len,
 235                                 "\talloc_pages: %d\n",
 236                                 credit->pools[i].alloc_pages);
 237                 len += snprintf(buf + len, buf_len - len,
 238                                 "\tfreed_pages: %d\n",
 239                                 credit->pools[i].total_freed_pages);
 240         }
 241
 242         len += snprintf(buf + len, buf_len - len, "\n### SPOOLS ###\n");
 243         for (i = 0; i < IWM_MACS_OUT_SGROUPS; i++) {
 244                 len += snprintf(buf + len, buf_len - len,
 245                                 "spools entry #%d\n", i);
 246                 len += snprintf(buf + len, buf_len - len,
 247                                 "\tid:          %d\n",
 248                                 credit->spools[i].id);
 249                 len += snprintf(buf + len, buf_len - len,
 250                                 "\tmax_pages:   %d\n",
 251                                 credit->spools[i].max_pages);
 252                 len += snprintf(buf + len, buf_len - len,
 253                                 "\talloc_pages: %d\n",
 254                                 credit->spools[i].alloc_pages);
 255
 256         }
 257
 258         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 259         kfree(buf);
 260
 261         return ret;
 262 }
 263
 264 static ssize_t iwm_debugfs_rx_ticket_read(struct file *filp,
 265                                           char __user *buffer,
 266                                           size_t count, loff_t *ppos)
 267 {
 268         struct iwm_priv *iwm = filp->private_data;
 269         struct iwm_rx_ticket_node *ticket, *next;
 270         char *buf;
 271         int buf_len = 4096, i;
 272         size_t len = 0;
 273         ssize_t ret;
 274
 275         if (*ppos != 0)
 276                 return 0;
 277         if (count < sizeof(buf))
 278                 return -ENOSPC;
 279
 280         buf = kzalloc(buf_len, GFP_KERNEL);
 281         if (!buf)
 282                 return -ENOMEM;
 283
 284         list_for_each_entry_safe(ticket, next, &iwm->rx_tickets, node) {
 285                 len += snprintf(buf + len, buf_len - len, "Ticket #%d\n",
 286                                 ticket->ticket->id);
 287                 len += snprintf(buf + len, buf_len - len, "\taction: 0x%x\n",
 288                                 ticket->ticket->action);
 289                 len += snprintf(buf + len, buf_len - len, "\tflags:  0x%x\n",
 290                                 ticket->ticket->flags);
 291         }
 292
 293         for (i = 0; i < IWM_RX_ID_HASH; i++) {
 294                 struct iwm_rx_packet *packet, *nxt;
 295                 struct list_head *pkt_list = &iwm->rx_packets[i];
 296                 if (!list_empty(pkt_list)) {
 297                         len += snprintf(buf + len, buf_len - len,
 298                                         "Packet hash #%d\n", i);
 299                         list_for_each_entry_safe(packet, nxt, pkt_list, node) {
 300                                 len += snprintf(buf + len, buf_len - len,
 301                                                 "\tPacket id:     %d\n",
 302                                                 packet->id);
 303                                 len += snprintf(buf + len, buf_len - len,
 304                                                 "\tPacket length: %lu\n",
 305                                                 packet->pkt_size);
 306                         }
 307                 }
 308         }
 309
 310         ret = simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 311         kfree(buf);
 312
 313         return ret;
 314 }
 315
 316 static ssize_t iwm_debugfs_fw_err_read(struct file *filp,
 317                                        char __user *buffer,
 318                                        size_t count, loff_t *ppos)
 319 {
 320
 321         struct iwm_priv *iwm = filp->private_data;
 322         char buf[512];
 323         int buf_len = 512;
 324         size_t len = 0;
 325
 326         if (*ppos != 0)
 327                 return 0;
 328         if (count < sizeof(buf))
 329                 return -ENOSPC;
 330
 331         if (!iwm->last_fw_err)
 332                 return -ENOMEM;
 333
 334         if (iwm->last_fw_err->line_num == 0)
 335                 goto out;
 336
 337         len += snprintf(buf + len, buf_len - len, "%cMAC FW ERROR:\n",
 338              (le32_to_cpu(iwm->last_fw_err->category) == UMAC_SYS_ERR_CAT_LMAC)
 339                         ? 'L' : 'U');
 340         len += snprintf(buf + len, buf_len - len,
 341                         "\tCategory:    %d\n",
 342                         le32_to_cpu(iwm->last_fw_err->category));
 343
 344         len += snprintf(buf + len, buf_len - len,
 345                         "\tStatus:      0x%x\n",
 346                         le32_to_cpu(iwm->last_fw_err->status));
 347
 348         len += snprintf(buf + len, buf_len - len,
 349                         "\tPC:          0x%x\n",
 350                         le32_to_cpu(iwm->last_fw_err->pc));
 351
 352         len += snprintf(buf + len, buf_len - len,
 353                         "\tblink1:      %d\n",
 354                         le32_to_cpu(iwm->last_fw_err->blink1));
 355
 356         len += snprintf(buf + len, buf_len - len,
 357                         "\tblink2:      %d\n",
 358                         le32_to_cpu(iwm->last_fw_err->blink2));
 359
 360         len += snprintf(buf + len, buf_len - len,
 361                         "\tilink1:      %d\n",
 362                         le32_to_cpu(iwm->last_fw_err->ilink1));
 363
 364         len += snprintf(buf + len, buf_len - len,
 365                         "\tilink2:      %d\n",
 366                         le32_to_cpu(iwm->last_fw_err->ilink2));
 367
 368         len += snprintf(buf + len, buf_len - len,
 369                         "\tData1:       0x%x\n",
 370                         le32_to_cpu(iwm->last_fw_err->data1));
 371
 372         len += snprintf(buf + len, buf_len - len,
 373                         "\tData2:       0x%x\n",
 374                         le32_to_cpu(iwm->last_fw_err->data2));
 375
 376         len += snprintf(buf + len, buf_len - len,
 377                         "\tLine number: %d\n",
 378                         le32_to_cpu(iwm->last_fw_err->line_num));
 379
 380         len += snprintf(buf + len, buf_len - len,
 381                         "\tUMAC status: 0x%x\n",
 382                         le32_to_cpu(iwm->last_fw_err->umac_status));
 383
 384         len += snprintf(buf + len, buf_len - len,
 385                         "\tLMAC status: 0x%x\n",
 386                         le32_to_cpu(iwm->last_fw_err->lmac_status));
 387
 388         len += snprintf(buf + len, buf_len - len,
 389                         "\tSDIO status: 0x%x\n",
 390                         le32_to_cpu(iwm->last_fw_err->sdio_status));
 391
 392 out:
 393
 394         return simple_read_from_buffer(buffer, len, ppos, buf, buf_len);
 395 }
 396
 397 static const struct file_operations iwm_debugfs_txq_fops = {
 398         .owner =        THIS_MODULE,
 399         .open =         iwm_generic_open,
 400         .read =         iwm_debugfs_txq_read,
 401 };
 402
 403 static const struct file_operations iwm_debugfs_tx_credit_fops = {
 404         .owner =        THIS_MODULE,
 405         .open =         iwm_generic_open,
 406         .read =         iwm_debugfs_tx_credit_read,
 407 };
 408
 409 static const struct file_operations iwm_debugfs_rx_ticket_fops = {
 410         .owner =        THIS_MODULE,
 411         .open =         iwm_generic_open,
 412         .read =         iwm_debugfs_rx_ticket_read,
 413 };
 414
 415 static const struct file_operations iwm_debugfs_fw_err_fops = {
 416         .owner =        THIS_MODULE,
 417         .open =         iwm_generic_open,
 418         .read =         iwm_debugfs_fw_err_read,
 419 };
 420
 421 int iwm_debugfs_init(struct iwm_priv *iwm)
 422 {
 423         int i, result;
 424         char devdir[16];
 425
 426         iwm->dbg.rootdir = debugfs_create_dir(KBUILD_MODNAME, NULL);
 427         result = PTR_ERR(iwm->dbg.rootdir);
 428         if (!result || IS_ERR(iwm->dbg.rootdir)) {
 429                 if (result == -ENODEV) {
 430                         IWM_ERR(iwm, "DebugFS (CONFIG_DEBUG_FS) not "
 431                                 "enabled in kernel config\n");
 432                         result = 0;     /* No debugfs support */
 433                 }
 434                 IWM_ERR(iwm, "Couldn't create rootdir: %d\n", result);
 435                 goto error;
 436         }
 437
 438         snprintf(devdir, sizeof(devdir), "%s", wiphy_name(iwm_to_wiphy(iwm)));
 439
 440         iwm->dbg.devdir = debugfs_create_dir(devdir, iwm->dbg.rootdir);
 441         result = PTR_ERR(iwm->dbg.devdir);
 442         if (IS_ERR(iwm->dbg.devdir) && (result != -ENODEV)) {
 443                 IWM_ERR(iwm, "Couldn't create devdir: %d\n", result);
 444                 goto error;
 445         }
 446
 447         iwm->dbg.dbgdir = debugfs_create_dir("debug", iwm->dbg.devdir);
 448         result = PTR_ERR(iwm->dbg.dbgdir);
 449         if (IS_ERR(iwm->dbg.dbgdir) && (result != -ENODEV)) {
 450                 IWM_ERR(iwm, "Couldn't create dbgdir: %d\n", result);
 451                 goto error;
 452         }
 453
 454         iwm->dbg.rxdir = debugfs_create_dir("rx", iwm->dbg.devdir);
 455         result = PTR_ERR(iwm->dbg.rxdir);
 456         if (IS_ERR(iwm->dbg.rxdir) && (result != -ENODEV)) {
 457                 IWM_ERR(iwm, "Couldn't create rx dir: %d\n", result);
 458                 goto error;
 459         }
 460
 461         iwm->dbg.txdir = debugfs_create_dir("tx", iwm->dbg.devdir);
 462         result = PTR_ERR(iwm->dbg.txdir);
 463         if (IS_ERR(iwm->dbg.txdir) && (result != -ENODEV)) {
 464                 IWM_ERR(iwm, "Couldn't create tx dir: %d\n", result);
 465                 goto error;
 466         }
 467
 468         iwm->dbg.busdir = debugfs_create_dir("bus", iwm->dbg.devdir);
 469         result = PTR_ERR(iwm->dbg.busdir);
 470         if (IS_ERR(iwm->dbg.busdir) && (result != -ENODEV)) {
 471                 IWM_ERR(iwm, "Couldn't create bus dir: %d\n", result);
 472                 goto error;
 473         }
 474
 475         if (iwm->bus_ops->debugfs_init) {
 476                 result = iwm->bus_ops->debugfs_init(iwm, iwm->dbg.busdir);
 477                 if (result < 0) {
 478                         IWM_ERR(iwm, "Couldn't create bus entry: %d\n", result);
 479                         goto error;
 480                 }
 481         }
 482
 483
 484         iwm->dbg.dbg_level = IWM_DL_NONE;
 485         iwm->dbg.dbg_level_dentry =
 486                 debugfs_create_file("level", 0200, iwm->dbg.dbgdir, iwm,
 487                                     &fops_iwm_dbg_level);
 488         result = PTR_ERR(iwm->dbg.dbg_level_dentry);
 489         if (IS_ERR(iwm->dbg.dbg_level_dentry) && (result != -ENODEV)) {
 490                 IWM_ERR(iwm, "Couldn't create dbg_level: %d\n", result);
 491                 goto error;
 492         }
 493
 494
 495         iwm->dbg.dbg_modules = IWM_DM_DEFAULT;
 496         iwm->dbg.dbg_modules_dentry =
 497                 debugfs_create_file("modules", 0200, iwm->dbg.dbgdir, iwm,
 498                                     &fops_iwm_dbg_modules);
 499         result = PTR_ERR(iwm->dbg.dbg_modules_dentry);
 500         if (IS_ERR(iwm->dbg.dbg_modules_dentry) && (result != -ENODEV)) {
 501                 IWM_ERR(iwm, "Couldn't create dbg_modules: %d\n", result);
 502                 goto error;
 503         }
 504
 505         for (i = 0; i < __IWM_DM_NR; i++)
 506                 add_dbg_module(iwm->dbg, iwm_debug_module[i].name,
 507                                iwm_debug_module[i].id, IWM_DL_DEFAULT);
 508
 509         iwm->dbg.txq_dentry = debugfs_create_file("queues", 0200,
 510                                                   iwm->dbg.txdir, iwm,
 511                                                   &iwm_debugfs_txq_fops);
 512         result = PTR_ERR(iwm->dbg.txq_dentry);
 513         if (IS_ERR(iwm->dbg.txq_dentry) && (result != -ENODEV)) {
 514                 IWM_ERR(iwm, "Couldn't create tx queue: %d\n", result);
 515                 goto error;
 516         }
 517
 518         iwm->dbg.tx_credit_dentry = debugfs_create_file("credits", 0200,
 519                                                    iwm->dbg.txdir, iwm,
 520                                                    &iwm_debugfs_tx_credit_fops);
 521         result = PTR_ERR(iwm->dbg.tx_credit_dentry);
 522         if (IS_ERR(iwm->dbg.tx_credit_dentry) && (result != -ENODEV)) {
 523                 IWM_ERR(iwm, "Couldn't create tx credit: %d\n", result);
 524                 goto error;
 525         }
 526
 527         iwm->dbg.rx_ticket_dentry = debugfs_create_file("tickets", 0200,
 528                                                   iwm->dbg.rxdir, iwm,
 529                                                   &iwm_debugfs_rx_ticket_fops);
 530         result = PTR_ERR(iwm->dbg.rx_ticket_dentry);
 531         if (IS_ERR(iwm->dbg.rx_ticket_dentry) && (result != -ENODEV)) {
 532                 IWM_ERR(iwm, "Couldn't create rx ticket: %d\n", result);
 533                 goto error;
 534         }
 535
 536         iwm->dbg.fw_err_dentry = debugfs_create_file("last_fw_err", 0200,
 537                                                      iwm->dbg.dbgdir, iwm,
 538                                                      &iwm_debugfs_fw_err_fops);
 539         result = PTR_ERR(iwm->dbg.fw_err_dentry);
 540         if (IS_ERR(iwm->dbg.fw_err_dentry) && (result != -ENODEV)) {
 541                 IWM_ERR(iwm, "Couldn't create last FW err: %d\n", result);
 542                 goto error;
 543         }
 544
 545
 546         return 0;
 547
 548  error:
 549         return result;
 550 }
 551
 552 void iwm_debugfs_exit(struct iwm_priv *iwm)
 553 {
 554         int i;
 555
 556         for (i = 0; i < __IWM_DM_NR; i++)
 557                 debugfs_remove(iwm->dbg.dbg_module_dentries[i]);
 558
 559         debugfs_remove(iwm->dbg.dbg_modules_dentry);
 560         debugfs_remove(iwm->dbg.dbg_level_dentry);
 561         debugfs_remove(iwm->dbg.txq_dentry);
 562         debugfs_remove(iwm->dbg.tx_credit_dentry);
 563         debugfs_remove(iwm->dbg.rx_ticket_dentry);
 564         debugfs_remove(iwm->dbg.fw_err_dentry);
 565         if (iwm->bus_ops->debugfs_exit)
 566                 iwm->bus_ops->debugfs_exit(iwm);
 567
 568         debugfs_remove(iwm->dbg.busdir);
 569         debugfs_remove(iwm->dbg.dbgdir);
 570         debugfs_remove(iwm->dbg.txdir);
 571         debugfs_remove(iwm->dbg.rxdir);
 572         debugfs_remove(iwm->dbg.devdir);
 573         debugfs_remove(iwm->dbg.rootdir);
 574 }