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