/****************************************************************************** * * GPL LICENSE SUMMARY * * Copyright(c) 2008 - 2009 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, * USA * * The full GNU General Public License is included in this distribution * in the file called LICENSE.GPL. * * Contact Information: * Intel Linux Wireless * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 *****************************************************************************/ #include #include #include #include #include #include "iwl-dev.h" #include "iwl-debug.h" #include "iwl-core.h" #include "iwl-io.h" /* create and remove of files */ #define DEBUGFS_ADD_DIR(name, parent) do { \ dbgfs->dir_##name = debugfs_create_dir(#name, parent); \ if (!(dbgfs->dir_##name)) \ goto err; \ } while (0) #define DEBUGFS_ADD_FILE(name, parent) do { \ dbgfs->dbgfs_##parent##_files.file_##name = \ debugfs_create_file(#name, 0644, dbgfs->dir_##parent, priv, \ &iwl_dbgfs_##name##_ops); \ if (!(dbgfs->dbgfs_##parent##_files.file_##name)) \ goto err; \ } while (0) #define DEBUGFS_ADD_BOOL(name, parent, ptr) do { \ dbgfs->dbgfs_##parent##_files.file_##name = \ debugfs_create_bool(#name, 0644, dbgfs->dir_##parent, ptr); \ if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name) \ || !dbgfs->dbgfs_##parent##_files.file_##name) \ goto err; \ } while (0) #define DEBUGFS_ADD_X32(name, parent, ptr) do { \ dbgfs->dbgfs_##parent##_files.file_##name = \ debugfs_create_x32(#name, 0444, dbgfs->dir_##parent, ptr); \ if (IS_ERR(dbgfs->dbgfs_##parent##_files.file_##name) \ || !dbgfs->dbgfs_##parent##_files.file_##name) \ goto err; \ } while (0) #define DEBUGFS_REMOVE(name) do { \ debugfs_remove(name); \ name = NULL; \ } while (0); /* file operation */ #define DEBUGFS_READ_FUNC(name) \ static ssize_t iwl_dbgfs_##name##_read(struct file *file, \ char __user *user_buf, \ size_t count, loff_t *ppos); #define DEBUGFS_WRITE_FUNC(name) \ static ssize_t iwl_dbgfs_##name##_write(struct file *file, \ const char __user *user_buf, \ size_t count, loff_t *ppos); static int iwl_dbgfs_open_file_generic(struct inode *inode, struct file *file) { file->private_data = inode->i_private; return 0; } #define DEBUGFS_READ_FILE_OPS(name) \ DEBUGFS_READ_FUNC(name); \ static const struct file_operations iwl_dbgfs_##name##_ops = { \ .read = iwl_dbgfs_##name##_read, \ .open = iwl_dbgfs_open_file_generic, \ }; #define DEBUGFS_WRITE_FILE_OPS(name) \ DEBUGFS_WRITE_FUNC(name); \ static const struct file_operations iwl_dbgfs_##name##_ops = { \ .write = iwl_dbgfs_##name##_write, \ .open = iwl_dbgfs_open_file_generic, \ }; #define DEBUGFS_READ_WRITE_FILE_OPS(name) \ DEBUGFS_READ_FUNC(name); \ DEBUGFS_WRITE_FUNC(name); \ static const struct file_operations iwl_dbgfs_##name##_ops = { \ .write = iwl_dbgfs_##name##_write, \ .read = iwl_dbgfs_##name##_read, \ .open = iwl_dbgfs_open_file_generic, \ }; static ssize_t iwl_dbgfs_tx_statistics_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = (struct iwl_priv *)file->private_data; char buf[256]; int pos = 0; const size_t bufsz = sizeof(buf); pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n", priv->tx_stats[0].cnt); pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n", priv->tx_stats[1].cnt); pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n", priv->tx_stats[2].cnt); return simple_read_from_buffer(user_buf, count, ppos, buf, pos); } static ssize_t iwl_dbgfs_rx_statistics_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = (struct iwl_priv *)file->private_data; char buf[256]; int pos = 0; const size_t bufsz = sizeof(buf); pos += scnprintf(buf + pos, bufsz - pos, "mgmt: %u\n", priv->rx_stats[0].cnt); pos += scnprintf(buf + pos, bufsz - pos, "ctrl: %u\n", priv->rx_stats[1].cnt); pos += scnprintf(buf + pos, bufsz - pos, "data: %u\n", priv->rx_stats[2].cnt); return simple_read_from_buffer(user_buf, count, ppos, buf, pos); } #define BYTE1_MASK 0x000000ff; #define BYTE2_MASK 0x0000ffff; #define BYTE3_MASK 0x00ffffff; static ssize_t iwl_dbgfs_sram_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { u32 val; char buf[1024]; ssize_t ret; int i; int pos = 0; struct iwl_priv *priv = (struct iwl_priv *)file->private_data; const size_t bufsz = sizeof(buf); for (i = priv->dbgfs->sram_len; i > 0; i -= 4) { val = iwl_read_targ_mem(priv, priv->dbgfs->sram_offset + \ priv->dbgfs->sram_len - i); if (i < 4) { switch (i) { case 1: val &= BYTE1_MASK; break; case 2: val &= BYTE2_MASK; break; case 3: val &= BYTE3_MASK; break; } } pos += scnprintf(buf + pos, bufsz - pos, "0x%08x ", val); } pos += scnprintf(buf + pos, bufsz - pos, "\n"); ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); return ret; } static ssize_t iwl_dbgfs_sram_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = file->private_data; char buf[64]; int buf_size; u32 offset, len; memset(buf, 0, sizeof(buf)); buf_size = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; if (sscanf(buf, "%x,%x", &offset, &len) == 2) { priv->dbgfs->sram_offset = offset; priv->dbgfs->sram_len = len; } else { priv->dbgfs->sram_offset = 0; priv->dbgfs->sram_len = 0; } return count; } static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = (struct iwl_priv *)file->private_data; struct iwl_station_entry *station; int max_sta = priv->hw_params.max_stations; char *buf; int i, j, pos = 0; ssize_t ret; /* Add 30 for initial string */ const size_t bufsz = 30 + sizeof(char) * 500 * (priv->num_stations); buf = kmalloc(bufsz, GFP_KERNEL); if (!buf) return -ENOMEM; pos += scnprintf(buf + pos, bufsz - pos, "num of stations: %d\n\n", priv->num_stations); for (i = 0; i < max_sta; i++) { station = &priv->stations[i]; if (station->used) { pos += scnprintf(buf + pos, bufsz - pos, "station %d:\ngeneral data:\n", i+1); pos += scnprintf(buf + pos, bufsz - pos, "id: %u\n", station->sta.sta.sta_id); pos += scnprintf(buf + pos, bufsz - pos, "mode: %u\n", station->sta.mode); pos += scnprintf(buf + pos, bufsz - pos, "flags: 0x%x\n", station->sta.station_flags_msk); pos += scnprintf(buf + pos, bufsz - pos, "ps_status: %u\n", station->ps_status); pos += scnprintf(buf + pos, bufsz - pos, "tid data:\n"); pos += scnprintf(buf + pos, bufsz - pos, "seq_num\t\ttxq_id"); pos += scnprintf(buf + pos, bufsz - pos, "\tframe_count\twait_for_ba\t"); pos += scnprintf(buf + pos, bufsz - pos, "start_idx\tbitmap0\t"); pos += scnprintf(buf + pos, bufsz - pos, "bitmap1\trate_n_flags"); pos += scnprintf(buf + pos, bufsz - pos, "\n"); for (j = 0; j < MAX_TID_COUNT; j++) { pos += scnprintf(buf + pos, bufsz - pos, "[%d]:\t\t%u", j, station->tid[j].seq_number); pos += scnprintf(buf + pos, bufsz - pos, "\t%u\t\t%u\t\t%u\t\t", station->tid[j].agg.txq_id, station->tid[j].agg.frame_count, station->tid[j].agg.wait_for_ba); pos += scnprintf(buf + pos, bufsz - pos, "%u\t%llu\t%u", station->tid[j].agg.start_idx, (unsigned long long)station->tid[j].agg.bitmap, station->tid[j].agg.rate_n_flags); pos += scnprintf(buf + pos, bufsz - pos, "\n"); } pos += scnprintf(buf + pos, bufsz - pos, "\n"); } } ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); return ret; } static ssize_t iwl_dbgfs_nvm_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { ssize_t ret; struct iwl_priv *priv = (struct iwl_priv *)file->private_data; int pos = 0, ofs = 0, buf_size = 0; const u8 *ptr; char *buf; size_t eeprom_len = priv->cfg->eeprom_size; buf_size = 4 * eeprom_len + 256; if (eeprom_len % 16) { IWL_ERR(priv, "NVM size is not multiple of 16.\n"); return -ENODATA; } ptr = priv->eeprom; if (!ptr) { IWL_ERR(priv, "Invalid EEPROM/OTP memory\n"); return -ENOMEM; } /* 4 characters for byte 0xYY */ buf = kzalloc(buf_size, GFP_KERNEL); if (!buf) { IWL_ERR(priv, "Can not allocate Buffer\n"); return -ENOMEM; } pos += scnprintf(buf + pos, buf_size - pos, "NVM Type: %s\n", (priv->nvm_device_type == NVM_DEVICE_TYPE_OTP) ? "OTP" : "EEPROM"); for (ofs = 0 ; ofs < eeprom_len ; ofs += 16) { pos += scnprintf(buf + pos, buf_size - pos, "0x%.4x ", ofs); hex_dump_to_buffer(ptr + ofs, 16 , 16, 2, buf + pos, buf_size - pos, 0); pos += strlen(buf); if (buf_size - pos > 0) buf[pos++] = '\n'; } ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); return ret; } static ssize_t iwl_dbgfs_log_event_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = file->private_data; u32 event_log_flag; char buf[8]; int buf_size; memset(buf, 0, sizeof(buf)); buf_size = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; if (sscanf(buf, "%d", &event_log_flag) != 1) return -EFAULT; if (event_log_flag == 1) iwl_dump_nic_event_log(priv); return count; } static ssize_t iwl_dbgfs_channels_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = (struct iwl_priv *)file->private_data; struct ieee80211_channel *channels = NULL; const struct ieee80211_supported_band *supp_band = NULL; int pos = 0, i, bufsz = PAGE_SIZE; char *buf; ssize_t ret; if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status)) return -EAGAIN; buf = kzalloc(bufsz, GFP_KERNEL); if (!buf) { IWL_ERR(priv, "Can not allocate Buffer\n"); return -ENOMEM; } supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ); if (supp_band) { channels = supp_band->channels; pos += scnprintf(buf + pos, bufsz - pos, "Displaying %d channels in 2.4GHz band 802.11bg):\n", supp_band->n_channels); for (i = 0; i < supp_band->n_channels; i++) pos += scnprintf(buf + pos, bufsz - pos, "%d: %ddBm: BSS%s%s, %s.\n", ieee80211_frequency_to_channel( channels[i].center_freq), channels[i].max_power, channels[i].flags & IEEE80211_CHAN_RADAR ? " (IEEE 802.11h required)" : "", ((channels[i].flags & IEEE80211_CHAN_NO_IBSS) || (channels[i].flags & IEEE80211_CHAN_RADAR)) ? "" : ", IBSS", channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN ? "passive only" : "active/passive"); } supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ); if (supp_band) { channels = supp_band->channels; pos += scnprintf(buf + pos, bufsz - pos, "Displaying %d channels in 5.2GHz band (802.11a)\n", supp_band->n_channels); for (i = 0; i < supp_band->n_channels; i++) pos += scnprintf(buf + pos, bufsz - pos, "%d: %ddBm: BSS%s%s, %s.\n", ieee80211_frequency_to_channel( channels[i].center_freq), channels[i].max_power, channels[i].flags & IEEE80211_CHAN_RADAR ? " (IEEE 802.11h required)" : "", ((channels[i].flags & IEEE80211_CHAN_NO_IBSS) || (channels[i].flags & IEEE80211_CHAN_RADAR)) ? "" : ", IBSS", channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN ? "passive only" : "active/passive"); } ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); return ret; } static ssize_t iwl_dbgfs_status_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = (struct iwl_priv *)file->private_data; char buf[512]; int pos = 0; const size_t bufsz = sizeof(buf); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_HCMD_ACTIVE:\t %d\n", test_bit(STATUS_HCMD_ACTIVE, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_HCMD_SYNC_ACTIVE: %d\n", test_bit(STATUS_HCMD_SYNC_ACTIVE, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_INT_ENABLED:\t %d\n", test_bit(STATUS_INT_ENABLED, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_RF_KILL_HW:\t %d\n", test_bit(STATUS_RF_KILL_HW, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_INIT:\t\t %d\n", test_bit(STATUS_INIT, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_ALIVE:\t\t %d\n", test_bit(STATUS_ALIVE, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_READY:\t\t %d\n", test_bit(STATUS_READY, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_TEMPERATURE:\t %d\n", test_bit(STATUS_TEMPERATURE, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_GEO_CONFIGURED:\t %d\n", test_bit(STATUS_GEO_CONFIGURED, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_EXIT_PENDING:\t %d\n", test_bit(STATUS_EXIT_PENDING, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_STATISTICS:\t %d\n", test_bit(STATUS_STATISTICS, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_SCANNING:\t %d\n", test_bit(STATUS_SCANNING, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_SCAN_ABORTING:\t %d\n", test_bit(STATUS_SCAN_ABORTING, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_SCAN_HW:\t\t %d\n", test_bit(STATUS_SCAN_HW, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_POWER_PMI:\t %d\n", test_bit(STATUS_POWER_PMI, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_FW_ERROR:\t %d\n", test_bit(STATUS_FW_ERROR, &priv->status)); pos += scnprintf(buf + pos, bufsz - pos, "STATUS_MODE_PENDING:\t %d\n", test_bit(STATUS_MODE_PENDING, &priv->status)); return simple_read_from_buffer(user_buf, count, ppos, buf, pos); } static ssize_t iwl_dbgfs_interrupt_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = (struct iwl_priv *)file->private_data; int pos = 0; int cnt = 0; char *buf; int bufsz = 24 * 64; /* 24 items * 64 char per item */ ssize_t ret; buf = kzalloc(bufsz, GFP_KERNEL); if (!buf) { IWL_ERR(priv, "Can not allocate Buffer\n"); return -ENOMEM; } pos += scnprintf(buf + pos, bufsz - pos, "Interrupt Statistics Report:\n"); pos += scnprintf(buf + pos, bufsz - pos, "HW Error:\t\t\t %u\n", priv->isr_stats.hw); pos += scnprintf(buf + pos, bufsz - pos, "SW Error:\t\t\t %u\n", priv->isr_stats.sw); if (priv->isr_stats.sw > 0) { pos += scnprintf(buf + pos, bufsz - pos, "\tLast Restarting Code: 0x%X\n", priv->isr_stats.sw_err); } #ifdef CONFIG_IWLWIFI_DEBUG pos += scnprintf(buf + pos, bufsz - pos, "Frame transmitted:\t\t %u\n", priv->isr_stats.sch); pos += scnprintf(buf + pos, bufsz - pos, "Alive interrupt:\t\t %u\n", priv->isr_stats.alive); #endif pos += scnprintf(buf + pos, bufsz - pos, "HW RF KILL switch toggled:\t %u\n", priv->isr_stats.rfkill); pos += scnprintf(buf + pos, bufsz - pos, "CT KILL:\t\t\t %u\n", priv->isr_stats.ctkill); pos += scnprintf(buf + pos, bufsz - pos, "Wakeup Interrupt:\t\t %u\n", priv->isr_stats.wakeup); pos += scnprintf(buf + pos, bufsz - pos, "Rx command responses:\t\t %u\n", priv->isr_stats.rx); for (cnt = 0; cnt < REPLY_MAX; cnt++) { if (priv->isr_stats.rx_handlers[cnt] > 0) pos += scnprintf(buf + pos, bufsz - pos, "\tRx handler[%36s]:\t\t %u\n", get_cmd_string(cnt), priv->isr_stats.rx_handlers[cnt]); } pos += scnprintf(buf + pos, bufsz - pos, "Tx/FH interrupt:\t\t %u\n", priv->isr_stats.tx); pos += scnprintf(buf + pos, bufsz - pos, "Unexpected INTA:\t\t %u\n", priv->isr_stats.unhandled); ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos); kfree(buf); return ret; } static ssize_t iwl_dbgfs_interrupt_write(struct file *file, const char __user *user_buf, size_t count, loff_t *ppos) { struct iwl_priv *priv = file->private_data; char buf[8]; int buf_size; u32 reset_flag; memset(buf, 0, sizeof(buf)); buf_size = min(count, sizeof(buf) - 1); if (copy_from_user(buf, user_buf, buf_size)) return -EFAULT; if (sscanf(buf, "%x", &reset_flag) != 1) return -EFAULT; if (reset_flag == 0) iwl_clear_isr_stats(priv); return count; } DEBUGFS_READ_WRITE_FILE_OPS(sram); DEBUGFS_WRITE_FILE_OPS(log_event); DEBUGFS_READ_FILE_OPS(nvm); DEBUGFS_READ_FILE_OPS(stations); DEBUGFS_READ_FILE_OPS(rx_statistics); DEBUGFS_READ_FILE_OPS(tx_statistics); DEBUGFS_READ_FILE_OPS(channels); DEBUGFS_READ_FILE_OPS(status); DEBUGFS_READ_WRITE_FILE_OPS(interrupt); /* * Create the debugfs files and directories * */ int iwl_dbgfs_register(struct iwl_priv *priv, const char *name) { struct iwl_debugfs *dbgfs; struct dentry *phyd = priv->hw->wiphy->debugfsdir; int ret = 0; dbgfs = kzalloc(sizeof(struct iwl_debugfs), GFP_KERNEL); if (!dbgfs) { ret = -ENOMEM; goto err; } priv->dbgfs = dbgfs; dbgfs->name = name; dbgfs->dir_drv = debugfs_create_dir(name, phyd); if (!dbgfs->dir_drv || IS_ERR(dbgfs->dir_drv)) { ret = -ENOENT; goto err; } DEBUGFS_ADD_DIR(data, dbgfs->dir_drv); DEBUGFS_ADD_DIR(rf, dbgfs->dir_drv); DEBUGFS_ADD_FILE(nvm, data); DEBUGFS_ADD_FILE(sram, data); DEBUGFS_ADD_FILE(log_event, data); DEBUGFS_ADD_FILE(stations, data); DEBUGFS_ADD_FILE(rx_statistics, data); DEBUGFS_ADD_FILE(tx_statistics, data); DEBUGFS_ADD_FILE(channels, data); DEBUGFS_ADD_FILE(status, data); DEBUGFS_ADD_FILE(interrupt, data); DEBUGFS_ADD_BOOL(disable_sensitivity, rf, &priv->disable_sens_cal); DEBUGFS_ADD_BOOL(disable_chain_noise, rf, &priv->disable_chain_noise_cal); DEBUGFS_ADD_BOOL(disable_tx_power, rf, &priv->disable_tx_power_cal); return 0; err: IWL_ERR(priv, "Can't open the debugfs directory\n"); iwl_dbgfs_unregister(priv); return ret; } EXPORT_SYMBOL(iwl_dbgfs_register); /** * Remove the debugfs files and directories * */ void iwl_dbgfs_unregister(struct iwl_priv *priv) { if (!priv->dbgfs) return; DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_nvm); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_rx_statistics); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_tx_statistics); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_sram); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_log_event); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_stations); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_channels); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_status); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_data_files.file_interrupt); DEBUGFS_REMOVE(priv->dbgfs->dir_data); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_sensitivity); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_chain_noise); DEBUGFS_REMOVE(priv->dbgfs->dbgfs_rf_files.file_disable_tx_power); DEBUGFS_REMOVE(priv->dbgfs->dir_rf); DEBUGFS_REMOVE(priv->dbgfs->dir_drv); kfree(priv->dbgfs); priv->dbgfs = NULL; } EXPORT_SYMBOL(iwl_dbgfs_unregister);