James Smart | 858c9f6 | 2007-06-17 19:56:39 -0500 | [diff] [blame^] | 1 | /******************************************************************* |
| 2 | * This file is part of the Emulex Linux Device Driver for * |
| 3 | * Fibre Channel Host Bus Adapters. * |
| 4 | * Copyright (C) 2007 Emulex. All rights reserved. * |
| 5 | * EMULEX and SLI are trademarks of Emulex. * |
| 6 | * www.emulex.com * |
| 7 | * * |
| 8 | * This program is free software; you can redistribute it and/or * |
| 9 | * modify it under the terms of version 2 of the GNU General * |
| 10 | * Public License as published by the Free Software Foundation. * |
| 11 | * This program is distributed in the hope that it will be useful. * |
| 12 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * |
| 13 | * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * |
| 14 | * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE * |
| 15 | * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD * |
| 16 | * TO BE LEGALLY INVALID. See the GNU General Public License for * |
| 17 | * more details, a copy of which can be found in the file COPYING * |
| 18 | * included with this package. * |
| 19 | *******************************************************************/ |
| 20 | |
| 21 | #include <linux/blkdev.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/dma-mapping.h> |
| 24 | #include <linux/idr.h> |
| 25 | #include <linux/interrupt.h> |
| 26 | #include <linux/kthread.h> |
| 27 | #include <linux/pci.h> |
| 28 | #include <linux/spinlock.h> |
| 29 | #include <linux/ctype.h> |
| 30 | #include <linux/version.h> |
| 31 | |
| 32 | #include <scsi/scsi.h> |
| 33 | #include <scsi/scsi_device.h> |
| 34 | #include <scsi/scsi_host.h> |
| 35 | #include <scsi/scsi_transport_fc.h> |
| 36 | |
| 37 | #include "lpfc_hw.h" |
| 38 | #include "lpfc_sli.h" |
| 39 | #include "lpfc_disc.h" |
| 40 | #include "lpfc_scsi.h" |
| 41 | #include "lpfc.h" |
| 42 | #include "lpfc_logmsg.h" |
| 43 | #include "lpfc_crtn.h" |
| 44 | #include "lpfc_vport.h" |
| 45 | #include "lpfc_version.h" |
| 46 | #include "lpfc_vport.h" |
| 47 | #include "lpfc_debugfs.h" |
| 48 | |
| 49 | #ifdef CONFIG_LPFC_DEBUG_FS |
| 50 | /* debugfs interface |
| 51 | * |
| 52 | * To access this interface the user should: |
| 53 | * # mkdir /debug |
| 54 | * # mount -t debugfs none /debug |
| 55 | * |
| 56 | * The lpfc debugfs directory hierachy is: |
| 57 | * lpfc/lpfcX/vportY |
| 58 | * where X is the lpfc hba unique_id |
| 59 | * where Y is the vport VPI on that hba |
| 60 | * |
| 61 | * Debugging services available per vport: |
| 62 | * discovery_trace |
| 63 | * This is an ACSII readable file that contains a trace of the last |
| 64 | * lpfc_debugfs_max_disc_trc events that happened on a specific vport. |
| 65 | * See lpfc_debugfs.h for different categories of |
| 66 | * discovery events. To enable the discovery trace, the following |
| 67 | * module parameters must be set: |
| 68 | * lpfc_debugfs_enable=1 Turns on lpfc debugfs filesystem support |
| 69 | * lpfc_debugfs_max_disc_trc=X Where X is the event trace depth for |
| 70 | * EACH vport. X MUST also be a power of 2. |
| 71 | * lpfc_debugfs_mask_disc_trc=Y Where Y is an event mask as defined in |
| 72 | * lpfc_debugfs.h . |
| 73 | */ |
| 74 | static int lpfc_debugfs_enable = 0; |
| 75 | module_param(lpfc_debugfs_enable, int, 0); |
| 76 | MODULE_PARM_DESC(lpfc_debugfs_enable, "Enable debugfs services"); |
| 77 | |
| 78 | static int lpfc_debugfs_max_disc_trc = 0; /* This MUST be a power of 2 */ |
| 79 | module_param(lpfc_debugfs_max_disc_trc, int, 0); |
| 80 | MODULE_PARM_DESC(lpfc_debugfs_max_disc_trc, |
| 81 | "Set debugfs discovery trace depth"); |
| 82 | |
| 83 | static int lpfc_debugfs_mask_disc_trc = 0; |
| 84 | module_param(lpfc_debugfs_mask_disc_trc, int, 0); |
| 85 | MODULE_PARM_DESC(lpfc_debugfs_mask_disc_trc, |
| 86 | "Set debugfs discovery trace mask"); |
| 87 | |
| 88 | #include <linux/debugfs.h> |
| 89 | |
| 90 | /* size of discovery_trace output line */ |
| 91 | #define LPFC_DISC_TRC_ENTRY_SIZE 80 |
| 92 | |
| 93 | /* nodelist output buffer size */ |
| 94 | #define LPFC_NODELIST_SIZE 8192 |
| 95 | #define LPFC_NODELIST_ENTRY_SIZE 120 |
| 96 | |
| 97 | struct lpfc_debug { |
| 98 | char *buffer; |
| 99 | int len; |
| 100 | }; |
| 101 | |
| 102 | atomic_t lpfc_debugfs_disc_trc_cnt = ATOMIC_INIT(0); |
| 103 | unsigned long lpfc_debugfs_start_time = 0L; |
| 104 | |
| 105 | static int |
| 106 | lpfc_debugfs_disc_trc_data(struct lpfc_vport *vport, char *buf, int size) |
| 107 | { |
| 108 | int i, index, len, enable; |
| 109 | uint32_t ms; |
| 110 | struct lpfc_disc_trc *dtp; |
| 111 | char buffer[80]; |
| 112 | |
| 113 | |
| 114 | enable = lpfc_debugfs_enable; |
| 115 | lpfc_debugfs_enable = 0; |
| 116 | |
| 117 | len = 0; |
| 118 | index = (atomic_read(&vport->disc_trc_cnt) + 1) & |
| 119 | (lpfc_debugfs_max_disc_trc - 1); |
| 120 | for (i = index; i < lpfc_debugfs_max_disc_trc; i++) { |
| 121 | dtp = vport->disc_trc + i; |
| 122 | if (!dtp->fmt) |
| 123 | continue; |
| 124 | ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time); |
| 125 | snprintf(buffer, 80, "%010d:%010d ms:%s\n", |
| 126 | dtp->seq_cnt, ms, dtp->fmt); |
| 127 | len += snprintf(buf+len, size-len, buffer, |
| 128 | dtp->data1, dtp->data2, dtp->data3); |
| 129 | } |
| 130 | for (i = 0; i < index; i++) { |
| 131 | dtp = vport->disc_trc + i; |
| 132 | if (!dtp->fmt) |
| 133 | continue; |
| 134 | ms = jiffies_to_msecs(dtp->jif - lpfc_debugfs_start_time); |
| 135 | snprintf(buffer, 80, "%010d:%010d ms:%s\n", |
| 136 | dtp->seq_cnt, ms, dtp->fmt); |
| 137 | len += snprintf(buf+len, size-len, buffer, |
| 138 | dtp->data1, dtp->data2, dtp->data3); |
| 139 | } |
| 140 | |
| 141 | lpfc_debugfs_enable = enable; |
| 142 | return len; |
| 143 | } |
| 144 | |
| 145 | static int |
| 146 | lpfc_debugfs_nodelist_data(struct lpfc_vport *vport, char *buf, int size) |
| 147 | { |
| 148 | int len = 0; |
| 149 | int cnt; |
| 150 | struct Scsi_Host *shost = lpfc_shost_from_vport(vport); |
| 151 | struct lpfc_nodelist *ndlp; |
| 152 | unsigned char *statep, *name; |
| 153 | |
| 154 | cnt = (LPFC_NODELIST_SIZE / LPFC_NODELIST_ENTRY_SIZE); |
| 155 | |
| 156 | spin_lock_irq(shost->host_lock); |
| 157 | list_for_each_entry(ndlp, &vport->fc_nodes, nlp_listp) { |
| 158 | if (!cnt) { |
| 159 | len += snprintf(buf+len, size-len, |
| 160 | "Missing Nodelist Entries\n"); |
| 161 | break; |
| 162 | } |
| 163 | cnt--; |
| 164 | switch (ndlp->nlp_state) { |
| 165 | case NLP_STE_UNUSED_NODE: |
| 166 | statep = "UNUSED"; |
| 167 | break; |
| 168 | case NLP_STE_PLOGI_ISSUE: |
| 169 | statep = "PLOGI "; |
| 170 | break; |
| 171 | case NLP_STE_ADISC_ISSUE: |
| 172 | statep = "ADISC "; |
| 173 | break; |
| 174 | case NLP_STE_REG_LOGIN_ISSUE: |
| 175 | statep = "REGLOG"; |
| 176 | break; |
| 177 | case NLP_STE_PRLI_ISSUE: |
| 178 | statep = "PRLI "; |
| 179 | break; |
| 180 | case NLP_STE_UNMAPPED_NODE: |
| 181 | statep = "UNMAP "; |
| 182 | break; |
| 183 | case NLP_STE_MAPPED_NODE: |
| 184 | statep = "MAPPED"; |
| 185 | break; |
| 186 | case NLP_STE_NPR_NODE: |
| 187 | statep = "NPR "; |
| 188 | break; |
| 189 | default: |
| 190 | statep = "UNKNOWN"; |
| 191 | } |
| 192 | len += snprintf(buf+len, size-len, "%s DID:x%06x ", |
| 193 | statep, ndlp->nlp_DID); |
| 194 | name = (unsigned char *)&ndlp->nlp_portname; |
| 195 | len += snprintf(buf+len, size-len, |
| 196 | "WWPN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x ", |
| 197 | *name, *(name+1), *(name+2), *(name+3), |
| 198 | *(name+4), *(name+5), *(name+6), *(name+7)); |
| 199 | name = (unsigned char *)&ndlp->nlp_nodename; |
| 200 | len += snprintf(buf+len, size-len, |
| 201 | "WWNN %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x ", |
| 202 | *name, *(name+1), *(name+2), *(name+3), |
| 203 | *(name+4), *(name+5), *(name+6), *(name+7)); |
| 204 | len += snprintf(buf+len, size-len, "RPI:%03d flag:x%08x ", |
| 205 | ndlp->nlp_rpi, ndlp->nlp_flag); |
| 206 | if (!ndlp->nlp_type) |
| 207 | len += snprintf(buf+len, size-len, "UNKNOWN_TYPE"); |
| 208 | if (ndlp->nlp_type & NLP_FC_NODE) |
| 209 | len += snprintf(buf+len, size-len, "FC_NODE "); |
| 210 | if (ndlp->nlp_type & NLP_FABRIC) |
| 211 | len += snprintf(buf+len, size-len, "FABRIC "); |
| 212 | if (ndlp->nlp_type & NLP_FCP_TARGET) |
| 213 | len += snprintf(buf+len, size-len, "FCP_TGT sid:%d ", |
| 214 | ndlp->nlp_sid); |
| 215 | if (ndlp->nlp_type & NLP_FCP_INITIATOR) |
| 216 | len += snprintf(buf+len, size-len, "FCP_INITIATOR"); |
| 217 | len += snprintf(buf+len, size-len, "\n"); |
| 218 | } |
| 219 | spin_unlock_irq(shost->host_lock); |
| 220 | return len; |
| 221 | } |
| 222 | #endif |
| 223 | |
| 224 | |
| 225 | inline void |
| 226 | lpfc_debugfs_disc_trc(struct lpfc_vport *vport, int mask, char *fmt, |
| 227 | uint32_t data1, uint32_t data2, uint32_t data3) |
| 228 | { |
| 229 | #ifdef CONFIG_LPFC_DEBUG_FS |
| 230 | struct lpfc_disc_trc *dtp; |
| 231 | int index; |
| 232 | |
| 233 | if (!(lpfc_debugfs_mask_disc_trc & mask)) |
| 234 | return; |
| 235 | |
| 236 | if (!lpfc_debugfs_enable || !lpfc_debugfs_max_disc_trc || |
| 237 | !vport || !vport->disc_trc) |
| 238 | return; |
| 239 | |
| 240 | index = atomic_inc_return(&vport->disc_trc_cnt) & |
| 241 | (lpfc_debugfs_max_disc_trc - 1); |
| 242 | dtp = vport->disc_trc + index; |
| 243 | dtp->fmt = fmt; |
| 244 | dtp->data1 = data1; |
| 245 | dtp->data2 = data2; |
| 246 | dtp->data3 = data3; |
| 247 | dtp->seq_cnt = atomic_inc_return(&lpfc_debugfs_disc_trc_cnt); |
| 248 | dtp->jif = jiffies; |
| 249 | #endif |
| 250 | return; |
| 251 | } |
| 252 | |
| 253 | #ifdef CONFIG_LPFC_DEBUG_FS |
| 254 | static int |
| 255 | lpfc_debugfs_disc_trc_open(struct inode *inode, struct file *file) |
| 256 | { |
| 257 | struct lpfc_vport *vport = inode->i_private; |
| 258 | struct lpfc_debug *debug; |
| 259 | int size; |
| 260 | int rc = -ENOMEM; |
| 261 | |
| 262 | if (!lpfc_debugfs_max_disc_trc) { |
| 263 | rc = -ENOSPC; |
| 264 | goto out; |
| 265 | } |
| 266 | |
| 267 | debug = kmalloc(sizeof(*debug), GFP_KERNEL); |
| 268 | if (!debug) |
| 269 | goto out; |
| 270 | |
| 271 | /* Round to page boundry */ |
| 272 | size = (lpfc_debugfs_max_disc_trc * LPFC_DISC_TRC_ENTRY_SIZE); |
| 273 | size = PAGE_ALIGN(size); |
| 274 | |
| 275 | debug->buffer = kmalloc(size, GFP_KERNEL); |
| 276 | if (!debug->buffer) { |
| 277 | kfree(debug); |
| 278 | goto out; |
| 279 | } |
| 280 | |
| 281 | debug->len = lpfc_debugfs_disc_trc_data(vport, debug->buffer, size); |
| 282 | file->private_data = debug; |
| 283 | |
| 284 | rc = 0; |
| 285 | out: |
| 286 | return rc; |
| 287 | } |
| 288 | |
| 289 | static int |
| 290 | lpfc_debugfs_nodelist_open(struct inode *inode, struct file *file) |
| 291 | { |
| 292 | struct lpfc_vport *vport = inode->i_private; |
| 293 | struct lpfc_debug *debug; |
| 294 | int rc = -ENOMEM; |
| 295 | |
| 296 | debug = kmalloc(sizeof(*debug), GFP_KERNEL); |
| 297 | if (!debug) |
| 298 | goto out; |
| 299 | |
| 300 | /* Round to page boundry */ |
| 301 | debug->buffer = kmalloc(LPFC_NODELIST_SIZE, GFP_KERNEL); |
| 302 | if (!debug->buffer) { |
| 303 | kfree(debug); |
| 304 | goto out; |
| 305 | } |
| 306 | |
| 307 | debug->len = lpfc_debugfs_nodelist_data(vport, debug->buffer, |
| 308 | LPFC_NODELIST_SIZE); |
| 309 | file->private_data = debug; |
| 310 | |
| 311 | rc = 0; |
| 312 | out: |
| 313 | return rc; |
| 314 | } |
| 315 | |
| 316 | static loff_t |
| 317 | lpfc_debugfs_lseek(struct file *file, loff_t off, int whence) |
| 318 | { |
| 319 | struct lpfc_debug *debug; |
| 320 | loff_t pos = -1; |
| 321 | |
| 322 | debug = file->private_data; |
| 323 | |
| 324 | switch (whence) { |
| 325 | case 0: |
| 326 | pos = off; |
| 327 | break; |
| 328 | case 1: |
| 329 | pos = file->f_pos + off; |
| 330 | break; |
| 331 | case 2: |
| 332 | pos = debug->len - off; |
| 333 | } |
| 334 | return (pos < 0 || pos > debug->len) ? -EINVAL : (file->f_pos = pos); |
| 335 | } |
| 336 | |
| 337 | static ssize_t |
| 338 | lpfc_debugfs_read(struct file *file, char __user *buf, |
| 339 | size_t nbytes, loff_t *ppos) |
| 340 | { |
| 341 | struct lpfc_debug *debug = file->private_data; |
| 342 | return simple_read_from_buffer(buf, nbytes, ppos, debug->buffer, |
| 343 | debug->len); |
| 344 | } |
| 345 | |
| 346 | static int |
| 347 | lpfc_debugfs_release(struct inode *inode, struct file *file) |
| 348 | { |
| 349 | struct lpfc_debug *debug = file->private_data; |
| 350 | |
| 351 | kfree(debug->buffer); |
| 352 | kfree(debug); |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | #undef lpfc_debugfs_op_disc_trc |
| 358 | static struct file_operations lpfc_debugfs_op_disc_trc = { |
| 359 | .owner = THIS_MODULE, |
| 360 | .open = lpfc_debugfs_disc_trc_open, |
| 361 | .llseek = lpfc_debugfs_lseek, |
| 362 | .read = lpfc_debugfs_read, |
| 363 | .release = lpfc_debugfs_release, |
| 364 | }; |
| 365 | |
| 366 | #undef lpfc_debugfs_op_nodelist |
| 367 | static struct file_operations lpfc_debugfs_op_nodelist = { |
| 368 | .owner = THIS_MODULE, |
| 369 | .open = lpfc_debugfs_nodelist_open, |
| 370 | .llseek = lpfc_debugfs_lseek, |
| 371 | .read = lpfc_debugfs_read, |
| 372 | .release = lpfc_debugfs_release, |
| 373 | }; |
| 374 | |
| 375 | static struct dentry *lpfc_debugfs_root = NULL; |
| 376 | static atomic_t lpfc_debugfs_hba_count; |
| 377 | #endif |
| 378 | |
| 379 | inline void |
| 380 | lpfc_debugfs_initialize(struct lpfc_vport *vport) |
| 381 | { |
| 382 | #ifdef CONFIG_LPFC_DEBUG_FS |
| 383 | struct lpfc_hba *phba = vport->phba; |
| 384 | char name[64]; |
| 385 | uint32_t num, i; |
| 386 | |
| 387 | if (!lpfc_debugfs_enable) |
| 388 | return; |
| 389 | |
| 390 | if (lpfc_debugfs_max_disc_trc) { |
| 391 | num = lpfc_debugfs_max_disc_trc - 1; |
| 392 | if (num & lpfc_debugfs_max_disc_trc) { |
| 393 | /* Change to be a power of 2 */ |
| 394 | num = lpfc_debugfs_max_disc_trc; |
| 395 | i = 0; |
| 396 | while (num > 1) { |
| 397 | num = num >> 1; |
| 398 | i++; |
| 399 | } |
| 400 | lpfc_debugfs_max_disc_trc = (1 << i); |
| 401 | printk(KERN_ERR |
| 402 | "lpfc_debugfs_max_disc_trc changed to %d\n", |
| 403 | lpfc_debugfs_max_disc_trc); |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | if (!lpfc_debugfs_root) { |
| 408 | lpfc_debugfs_root = debugfs_create_dir("lpfc", NULL); |
| 409 | atomic_set(&lpfc_debugfs_hba_count, 0); |
| 410 | if (!lpfc_debugfs_root) |
| 411 | goto debug_failed; |
| 412 | } |
| 413 | |
| 414 | snprintf(name, sizeof(name), "lpfc%d", phba->brd_no); |
| 415 | if (!phba->hba_debugfs_root) { |
| 416 | phba->hba_debugfs_root = |
| 417 | debugfs_create_dir(name, lpfc_debugfs_root); |
| 418 | if (!phba->hba_debugfs_root) |
| 419 | goto debug_failed; |
| 420 | atomic_inc(&lpfc_debugfs_hba_count); |
| 421 | atomic_set(&phba->debugfs_vport_count, 0); |
| 422 | } |
| 423 | |
| 424 | snprintf(name, sizeof(name), "vport%d", vport->vpi); |
| 425 | if (!vport->vport_debugfs_root) { |
| 426 | vport->vport_debugfs_root = |
| 427 | debugfs_create_dir(name, phba->hba_debugfs_root); |
| 428 | if (!vport->vport_debugfs_root) |
| 429 | goto debug_failed; |
| 430 | atomic_inc(&phba->debugfs_vport_count); |
| 431 | } |
| 432 | |
| 433 | if (!lpfc_debugfs_start_time) |
| 434 | lpfc_debugfs_start_time = jiffies; |
| 435 | |
| 436 | vport->disc_trc = kmalloc( |
| 437 | (sizeof(struct lpfc_disc_trc) * lpfc_debugfs_max_disc_trc), |
| 438 | GFP_KERNEL); |
| 439 | |
| 440 | if (!vport->disc_trc) |
| 441 | goto debug_failed; |
| 442 | memset(vport->disc_trc, 0, |
| 443 | (sizeof(struct lpfc_disc_trc) * lpfc_debugfs_max_disc_trc)); |
| 444 | |
| 445 | snprintf(name, sizeof(name), "discovery_trace"); |
| 446 | vport->debug_disc_trc = |
| 447 | debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, |
| 448 | vport->vport_debugfs_root, |
| 449 | vport, &lpfc_debugfs_op_disc_trc); |
| 450 | if (!vport->debug_disc_trc) { |
| 451 | lpfc_printf_log(phba, KERN_ERR, LOG_INIT, |
| 452 | "%d:0409 Cannot create debugfs", |
| 453 | phba->brd_no); |
| 454 | goto debug_failed; |
| 455 | } |
| 456 | snprintf(name, sizeof(name), "nodelist"); |
| 457 | vport->debug_nodelist = |
| 458 | debugfs_create_file(name, S_IFREG|S_IRUGO|S_IWUSR, |
| 459 | vport->vport_debugfs_root, |
| 460 | vport, &lpfc_debugfs_op_nodelist); |
| 461 | if (!vport->debug_nodelist) { |
| 462 | lpfc_printf_log(phba, KERN_ERR, LOG_INIT, |
| 463 | "%d:0409 Cannot create debugfs", |
| 464 | phba->brd_no); |
| 465 | goto debug_failed; |
| 466 | } |
| 467 | debug_failed: |
| 468 | return; |
| 469 | #endif |
| 470 | } |
| 471 | |
| 472 | |
| 473 | inline void |
| 474 | lpfc_debugfs_terminate(struct lpfc_vport *vport) |
| 475 | { |
| 476 | #ifdef CONFIG_LPFC_DEBUG_FS |
| 477 | struct lpfc_hba *phba = vport->phba; |
| 478 | |
| 479 | if (vport->disc_trc) { |
| 480 | kfree(vport->disc_trc); |
| 481 | vport->disc_trc = NULL; |
| 482 | } |
| 483 | if (vport->debug_disc_trc) { |
| 484 | debugfs_remove(vport->debug_disc_trc); /* discovery_trace */ |
| 485 | vport->debug_disc_trc = NULL; |
| 486 | } |
| 487 | if (vport->debug_nodelist) { |
| 488 | debugfs_remove(vport->debug_nodelist); /* nodelist */ |
| 489 | vport->debug_nodelist = NULL; |
| 490 | } |
| 491 | if (vport->vport_debugfs_root) { |
| 492 | debugfs_remove(vport->vport_debugfs_root); /* vportX */ |
| 493 | vport->vport_debugfs_root = NULL; |
| 494 | atomic_dec(&phba->debugfs_vport_count); |
| 495 | } |
| 496 | if (atomic_read(&phba->debugfs_vport_count) == 0) { |
| 497 | debugfs_remove(vport->phba->hba_debugfs_root); /* lpfcX */ |
| 498 | vport->phba->hba_debugfs_root = NULL; |
| 499 | atomic_dec(&lpfc_debugfs_hba_count); |
| 500 | if (atomic_read(&lpfc_debugfs_hba_count) == 0) { |
| 501 | debugfs_remove(lpfc_debugfs_root); /* lpfc */ |
| 502 | lpfc_debugfs_root = NULL; |
| 503 | } |
| 504 | } |
| 505 | #endif |
| 506 | } |
| 507 | |
| 508 | |