/*
* Marvell Wireless LAN device driver: debugfs
*
* Copyright (C) 2011-2014, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include <linux/debugfs.h>
#include "main.h"
#include "11n.h"
static struct dentry *mwifiex_dfs_dir;
static char *bss_modes[] = {
"UNSPECIFIED",
"ADHOC",
"STATION",
"AP",
"AP_VLAN",
"WDS",
"MONITOR",
"MESH_POINT",
"P2P_CLIENT",
"P2P_GO",
"P2P_DEVICE",
};
/*
* Proc info file read handler.
*
* This function is called when the 'info' file is opened for reading.
* It prints the following driver related information -
* - Driver name
* - Driver version
* - Driver extended version
* - Interface name
* - BSS mode
* - Media state (connected or disconnected)
* - MAC address
* - Total number of Tx bytes
* - Total number of Rx bytes
* - Total number of Tx packets
* - Total number of Rx packets
* - Total number of dropped Tx packets
* - Total number of dropped Rx packets
* - Total number of corrupted Tx packets
* - Total number of corrupted Rx packets
* - Carrier status (on or off)
* - Tx queue status (started or stopped)
*
* For STA mode drivers, it also prints the following extra -
* - ESSID
* - BSSID
* - Channel
* - Region code
* - Multicast count
* - Multicast addresses
*/
static ssize_t
mwifiex_info_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv =
(struct mwifiex_private *) file->private_data;
struct net_device *netdev = priv->netdev;
struct netdev_hw_addr *ha;
struct netdev_queue *txq;
unsigned long page = get_zeroed_page(GFP_KERNEL);
char *p = (char *) page, fmt[64];
struct mwifiex_bss_info info;
ssize_t ret;
int i = 0;
if (!p)
return -ENOMEM;
memset(&info, 0, sizeof(info));
ret = mwifiex_get_bss_info(priv, &info);
if (ret)
goto free_and_exit;
mwifiex_drv_get_driver_version(priv->adapter, fmt, sizeof(fmt) - 1);
if (!priv->version_str[0])
mwifiex_get_ver_ext(priv);
p += sprintf(p, "driver_name = " "\"mwifiex\"\n");
p += sprintf(p, "driver_version = %s", fmt);
p += sprintf(p, "\nverext = %s", priv->version_str);
p += sprintf(p, "\ninterface_name=\"%s\"\n", netdev->name);
if (info.bss_mode >= ARRAY_SIZE(bss_modes))
p += sprintf(p, "bss_mode=\"%d\"\n", info.bss_mode);
else
p += sprintf(p, "bss_mode=\"%s\"\n", bss_modes[info.bss_mode]);
p += sprintf(p, "media_state=\"%s\"\n",
(!priv->media_connected ? "Disconnected" : "Connected"));
p += sprintf(p, "mac_address=\"%pM\"\n", netdev->dev_addr);
if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
p += sprintf(p, "multicast_count=\"%d\"\n",
netdev_mc_count(netdev));
p += sprintf(p, "essid=\"%s\"\n", info.ssid.ssid);
p += sprintf(p, "bssid=\"%pM\"\n", info.bssid);
p += sprintf(p, "channel=\"%d\"\n", (int) info.bss_chan);
p += sprintf(p, "country_code = \"%s\"\n", info.country_code);
netdev_for_each_mc_addr(ha, netdev)
p += sprintf(p, "multicast_address[%d]=\"%pM\"\n",
i++, ha->addr);
}
p += sprintf(p, "num_tx_bytes = %lu\n", priv->stats.tx_bytes);
p += sprintf(p, "num_rx_bytes = %lu\n", priv->stats.rx_bytes);
p += sprintf(p, "num_tx_pkts = %lu\n", priv->stats.tx_packets);
p += sprintf(p, "num_rx_pkts = %lu\n", priv->stats.rx_packets);
p += sprintf(p, "num_tx_pkts_dropped = %lu\n", priv->stats.tx_dropped);
p += sprintf(p, "num_rx_pkts_dropped = %lu\n", priv->stats.rx_dropped);
p += sprintf(p, "num_tx_pkts_err = %lu\n", priv->stats.tx_errors);
p += sprintf(p, "num_rx_pkts_err = %lu\n", priv->stats.rx_errors);
p += sprintf(p, "carrier %s\n", ((netif_carrier_ok(priv->netdev))
? "on" : "off"));
p += sprintf(p, "tx queue");
for (i = 0; i < netdev->num_tx_queues; i++) {
txq = netdev_get_tx_queue(netdev, i);
p += sprintf(p, " %d:%s", i, netif_tx_queue_stopped(txq) ?
"stopped" : "started");
}
p += sprintf(p, "\n");
ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
(unsigned long) p - page);
free_and_exit:
free_page(page);
return ret;
}
/*
* Proc firmware dump read handler.
*
* This function is called when the 'fw_dump' file is opened for
* reading.
* This function dumps firmware memory in different files
* (ex. DTCM, ITCM, SQRAM etc.) based on the the segments for
* debugging.
*/
static ssize_t
mwifiex_fw_dump_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv = file->private_data;
if (!priv->adapter->if_ops.fw_dump)
return -EIO;
priv->adapter->if_ops.fw_dump(priv->adapter);
return 0;
}
/*
* Proc getlog file read handler.
*
* This function is called when the 'getlog' file is opened for reading
* It prints the following log information -
* - Number of multicast Tx frames
* - Number of failed packets
* - Number of Tx retries
* - Number of multicast Tx retries
* - Number of duplicate frames
* - Number of RTS successes
* - Number of RTS failures
* - Number of ACK failures
* - Number of fragmented Rx frames
* - Number of multicast Rx frames
* - Number of FCS errors
* - Number of Tx frames
* - WEP ICV error counts
* - Number of received beacons
* - Number of missed beacons
*/
static ssize_t
mwifiex_getlog_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv =
(struct mwifiex_private *) file->private_data;
unsigned long page = get_zeroed_page(GFP_KERNEL);
char *p = (char *) page;
ssize_t ret;
struct mwifiex_ds_get_stats stats;
if (!p)
return -ENOMEM;
memset(&stats, 0, sizeof(stats));
ret = mwifiex_get_stats_info(priv, &stats);
if (ret)
goto free_and_exit;
p += sprintf(p, "\n"
"mcasttxframe %u\n"
"failed %u\n"
"retry %u\n"
"multiretry %u\n"
"framedup %u\n"
"rtssuccess %u\n"
"rtsfailure %u\n"
"ackfailure %u\n"
"rxfrag %u\n"
"mcastrxframe %u\n"
"fcserror %u\n"
"txframe %u\n"
"wepicverrcnt-1 %u\n"
"wepicverrcnt-2 %u\n"
"wepicverrcnt-3 %u\n"
"wepicverrcnt-4 %u\n"
"bcn_rcv_cnt %u\n"
"bcn_miss_cnt %u\n",
stats.mcast_tx_frame,
stats.failed,
stats.retry,
stats.multi_retry,
stats.frame_dup,
stats.rts_success,
stats.rts_failure,
stats.ack_failure,
stats.rx_frag,
stats.mcast_rx_frame,
stats.fcs_error,
stats.tx_frame,
stats.wep_icv_error[0],
stats.wep_icv_error[1],
stats.wep_icv_error[2],
stats.wep_icv_error[3],
stats.bcn_rcv_cnt,
stats.bcn_miss_cnt);
ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
(unsigned long) p - page);
free_and_exit:
free_page(page);
return ret;
}
/* Sysfs histogram file read handler.
*
* This function is called when the 'histogram' file is opened for reading
* It prints the following histogram information -
* - Number of histogram samples
* - Receive packet number of each rx_rate
* - Receive packet number of each snr
* - Receive packet number of each nosie_flr
* - Receive packet number of each signal streath
*/
static ssize_t
mwifiex_histogram_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv =
(struct mwifiex_private *)file->private_data;
ssize_t ret;
struct mwifiex_histogram_data *phist_data;
int i, value;
unsigned long page = get_zeroed_page(GFP_KERNEL);
char *p = (char *)page;
if (!p)
return -ENOMEM;
if (!priv || !priv->hist_data)
return -EFAULT;
phist_data = priv->hist_data;
p += sprintf(p, "\n"
"total samples = %d\n",
atomic_read(&phist_data->num_samples));
p += sprintf(p, "rx rates (in Mbps): 0=1M 1=2M");
p += sprintf(p, "2=5.5M 3=11M 4=6M 5=9M 6=12M\n");
p += sprintf(p, "7=18M 8=24M 9=36M 10=48M 11=54M");
p += sprintf(p, "12-27=MCS0-15(BW20) 28-43=MCS0-15(BW40)\n");
if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info)) {
p += sprintf(p, "44-53=MCS0-9(VHT:BW20)");
p += sprintf(p, "54-63=MCS0-9(VHT:BW40)");
p += sprintf(p, "64-73=MCS0-9(VHT:BW80)\n\n");
} else {
p += sprintf(p, "\n");
}
for (i = 0; i < MWIFIEX_MAX_RX_RATES; i++) {
value = atomic_read(&phist_data->rx_rate[i]);
if (value)
p += sprintf(p, "rx_rate[%02d] = %d\n", i, value);
}
if (ISSUPP_11ACENABLED(priv->adapter->fw_cap_info)) {
for (i = MWIFIEX_MAX_RX_RATES; i < MWIFIEX_MAX_AC_RX_RATES;
i++) {
value = atomic_read(&phist_data->rx_rate[i]);
if (value)
p += sprintf(p, "rx_rate[%02d] = %d\n",
i, value);
}
}
for (i = 0; i < MWIFIEX_MAX_SNR; i++) {
value = atomic_read(&phist_data->snr[i]);
if (value)
p += sprintf(p, "snr[%02ddB] = %d\n", i, value);
}
for (i = 0; i < MWIFIEX_MAX_NOISE_FLR; i++) {
value = atomic_read(&phist_data->noise_flr[i]);
if (value)
p += sprintf(p, "noise_flr[-%02ddBm] = %d\n",
(int)(i-128), value);
}
for (i = 0; i < MWIFIEX_MAX_SIG_STRENGTH; i++) {
value = atomic_read(&phist_data->sig_str[i]);
if (value)
p += sprintf(p, "sig_strength[-%02ddBm] = %d\n",
i, value);
}
ret = simple_read_from_buffer(ubuf, count, ppos, (char *)page,
(unsigned long)p - page);
return ret;
}
static ssize_t
mwifiex_histogram_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv = (void *)file->private_data;
if (priv && priv->hist_data)
mwifiex_hist_data_reset(priv);
return 0;
}
static struct mwifiex_debug_info info;
/*
* Proc debug file read handler.
*
* This function is called when the 'debug' file is opened for reading
* It prints the following log information -
* - Interrupt count
* - WMM AC VO packets count
* - WMM AC VI packets count
* - WMM AC BE packets count
* - WMM AC BK packets count
* - Maximum Tx buffer size
* - Tx buffer size
* - Current Tx buffer size
* - Power Save mode
* - Power Save state
* - Deep Sleep status
* - Device wakeup required status
* - Number of wakeup tries
* - Host Sleep configured status
* - Host Sleep activated status
* - Number of Tx timeouts
* - Number of command timeouts
* - Last timed out command ID
* - Last timed out command action
* - Last command ID
* - Last command action
* - Last command index
* - Last command response ID
* - Last command response index
* - Last event
* - Last event index
* - Number of host to card command failures
* - Number of sleep confirm command failures
* - Number of host to card data failure
* - Number of deauthentication events
* - Number of disassociation events
* - Number of link lost events
* - Number of deauthentication commands
* - Number of association success commands
* - Number of association failure commands
* - Number of commands sent
* - Number of data packets sent
* - Number of command responses received
* - Number of events received
* - Tx BA stream table (TID, RA)
* - Rx reorder table (TID, TA, Start window, Window size, Buffer)
*/
static ssize_t
mwifiex_debug_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv =
(struct mwifiex_private *) file->private_data;
unsigned long page = get_zeroed_page(GFP_KERNEL);
char *p = (char *) page;
ssize_t ret;
if (!p)
return -ENOMEM;
ret = mwifiex_get_debug_info(priv, &info);
if (ret)
goto free_and_exit;
p += mwifiex_debug_info_to_buffer(priv, p, &info);
ret = simple_read_from_buffer(ubuf, count, ppos, (char *) page,
(unsigned long) p - page);
free_and_exit:
free_page(page);
return ret;
}
static u32 saved_reg_type, saved_reg_offset, saved_reg_value;
/*
* Proc regrdwr file write handler.
*
* This function is called when the 'regrdwr' file is opened for writing
*
* This function can be used to write to a register.
*/
static ssize_t
mwifiex_regrdwr_write(struct file *file,
const char __user *ubuf, size_t count, loff_t *ppos)
{
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *) addr;
size_t buf_size = min_t(size_t, count, PAGE_SIZE - 1);
int ret;
u32 reg_type = 0, reg_offset = 0, reg_value = UINT_MAX;
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, ubuf, buf_size)) {
ret = -EFAULT;
goto done;
}
sscanf(buf, "%u %x %x", ®_type, ®_offset, ®_value);
if (reg_type == 0 || reg_offset == 0) {
ret = -EINVAL;
goto done;
} else {
saved_reg_type = reg_type;
saved_reg_offset = reg_offset;
saved_reg_value = reg_value;
ret = count;
}
done:
free_page(addr);
return ret;
}
/*
* Proc regrdwr file read handler.
*
* This function is called when the 'regrdwr' file is opened for reading
*
* This function can be used to read from a register.
*/
static ssize_t
mwifiex_regrdwr_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv =
(struct mwifiex_private *) file->private_data;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *) addr;
int pos = 0, ret = 0;
u32 reg_value;
if (!buf)
return -ENOMEM;
if (!saved_reg_type) {
/* No command has been given */
pos += snprintf(buf, PAGE_SIZE, "0");
goto done;
}
/* Set command has been given */
if (saved_reg_value != UINT_MAX) {
ret = mwifiex_reg_write(priv, saved_reg_type, saved_reg_offset,
saved_reg_value);
pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n",
saved_reg_type, saved_reg_offset,
saved_reg_value);
ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
goto done;
}
/* Get command has been given */
ret = mwifiex_reg_read(priv, saved_reg_type,
saved_reg_offset, ®_value);
if (ret) {
ret = -EINVAL;
goto done;
}
pos += snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", saved_reg_type,
saved_reg_offset, reg_value);
ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
done:
free_page(addr);
return ret;
}
static u32 saved_offset = -1, saved_bytes = -1;
/*
* Proc rdeeprom file write handler.
*
* This function is called when the 'rdeeprom' file is opened for writing
*
* This function can be used to write to a RDEEPROM location.
*/
static ssize_t
mwifiex_rdeeprom_write(struct file *file,
const char __user *ubuf, size_t count, loff_t *ppos)
{
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *) addr;
size_t buf_size = min_t(size_t, count, PAGE_SIZE - 1);
int ret = 0;
int offset = -1, bytes = -1;
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, ubuf, buf_size)) {
ret = -EFAULT;
goto done;
}
sscanf(buf, "%d %d", &offset, &bytes);
if (offset == -1 || bytes == -1) {
ret = -EINVAL;
goto done;
} else {
saved_offset = offset;
saved_bytes = bytes;
ret = count;
}
done:
free_page(addr);
return ret;
}
/*
* Proc rdeeprom read write handler.
*
* This function is called when the 'rdeeprom' file is opened for reading
*
* This function can be used to read from a RDEEPROM location.
*/
static ssize_t
mwifiex_rdeeprom_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv =
(struct mwifiex_private *) file->private_data;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *) addr;
int pos = 0, ret = 0, i;
u8 value[MAX_EEPROM_DATA];
if (!buf)
return -ENOMEM;
if (saved_offset == -1) {
/* No command has been given */
pos += snprintf(buf, PAGE_SIZE, "0");
goto done;
}
/* Get command has been given */
ret = mwifiex_eeprom_read(priv, (u16) saved_offset,
(u16) saved_bytes, value);
if (ret) {
ret = -EINVAL;
goto done;
}
pos += snprintf(buf, PAGE_SIZE, "%d %d ", saved_offset, saved_bytes);
for (i = 0; i < saved_bytes; i++)
pos += snprintf(buf + strlen(buf), PAGE_SIZE, "%d ", value[i]);
ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
done:
free_page(addr);
return ret;
}
/* Proc hscfg file write handler
* This function can be used to configure the host sleep parameters.
*/
static ssize_t
mwifiex_hscfg_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv = (void *)file->private_data;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
size_t buf_size = min_t(size_t, count, PAGE_SIZE - 1);
int ret, arg_num;
struct mwifiex_ds_hs_cfg hscfg;
int conditions = HS_CFG_COND_DEF;
u32 gpio = HS_CFG_GPIO_DEF, gap = HS_CFG_GAP_DEF;
if (!buf)
return -ENOMEM;
if (copy_from_user(buf, ubuf, buf_size)) {
ret = -EFAULT;
goto done;
}
arg_num = sscanf(buf, "%d %x %x", &conditions, &gpio, &gap);
memset(&hscfg, 0, sizeof(struct mwifiex_ds_hs_cfg));
if (arg_num > 3) {
dev_err(priv->adapter->dev, "Too many arguments\n");
ret = -EINVAL;
goto done;
}
if (arg_num >= 1 && arg_num < 3)
mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_GET,
MWIFIEX_SYNC_CMD, &hscfg);
if (arg_num) {
if (conditions == HS_CFG_CANCEL) {
mwifiex_cancel_hs(priv, MWIFIEX_ASYNC_CMD);
ret = count;
goto done;
}
hscfg.conditions = conditions;
}
if (arg_num >= 2)
hscfg.gpio = gpio;
if (arg_num == 3)
hscfg.gap = gap;
hscfg.is_invoke_hostcmd = false;
mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_SET,
MWIFIEX_SYNC_CMD, &hscfg);
mwifiex_enable_hs(priv->adapter);
priv->adapter->hs_enabling = false;
ret = count;
done:
free_page(addr);
return ret;
}
/* Proc hscfg file read handler
* This function can be used to read host sleep configuration
* parameters from driver.
*/
static ssize_t
mwifiex_hscfg_read(struct file *file, char __user *ubuf,
size_t count, loff_t *ppos)
{
struct mwifiex_private *priv = (void *)file->private_data;
unsigned long addr = get_zeroed_page(GFP_KERNEL);
char *buf = (char *)addr;
int pos, ret;
struct mwifiex_ds_hs_cfg hscfg;
if (!buf)
return -ENOMEM;
mwifiex_set_hs_params(priv, HostCmd_ACT_GEN_GET,
MWIFIEX_SYNC_CMD, &hscfg);
pos = snprintf(buf, PAGE_SIZE, "%u 0x%x 0x%x\n", hscfg.conditions,
hscfg.gpio, hscfg.gap);
ret = simple_read_from_buffer(ubuf, count, ppos, buf, pos);
free_page(addr);
return ret;
}
#define MWIFIEX_DFS_ADD_FILE(name) do { \
if (!debugfs_create_file(#name, 0644, priv->dfs_dev_dir, \
priv, &mwifiex_dfs_##name##_fops)) \
return; \
} while (0);
#define MWIFIEX_DFS_FILE_OPS(name) \
static const struct file_operations mwifiex_dfs_##name##_fops = { \
.read = mwifiex_##name##_read, \
.write = mwifiex_##name##_write, \
.open = simple_open, \
};
#define MWIFIEX_DFS_FILE_READ_OPS(name) \
static const struct file_operations mwifiex_dfs_##name##_fops = { \
.read = mwifiex_##name##_read, \
.open = simple_open, \
};
#define MWIFIEX_DFS_FILE_WRITE_OPS(name) \
static const struct file_operations mwifiex_dfs_##name##_fops = { \
.write = mwifiex_##name##_write, \
.open = simple_open, \
};
MWIFIEX_DFS_FILE_READ_OPS(info);
MWIFIEX_DFS_FILE_READ_OPS(debug);
MWIFIEX_DFS_FILE_READ_OPS(getlog);
MWIFIEX_DFS_FILE_READ_OPS(fw_dump);
MWIFIEX_DFS_FILE_OPS(regrdwr);
MWIFIEX_DFS_FILE_OPS(rdeeprom);
MWIFIEX_DFS_FILE_OPS(hscfg);
MWIFIEX_DFS_FILE_OPS(histogram);
/*
* This function creates the debug FS directory structure and the files.
*/
void
mwifiex_dev_debugfs_init(struct mwifiex_private *priv)
{
if (!mwifiex_dfs_dir || !priv)
return;
priv->dfs_dev_dir = debugfs_create_dir(priv->netdev->name,
mwifiex_dfs_dir);
if (!priv->dfs_dev_dir)
return;
MWIFIEX_DFS_ADD_FILE(info);
MWIFIEX_DFS_ADD_FILE(debug);
MWIFIEX_DFS_ADD_FILE(getlog);
MWIFIEX_DFS_ADD_FILE(regrdwr);
MWIFIEX_DFS_ADD_FILE(rdeeprom);
MWIFIEX_DFS_ADD_FILE(fw_dump);
MWIFIEX_DFS_ADD_FILE(hscfg);
MWIFIEX_DFS_ADD_FILE(histogram);
}
/*
* This function removes the debug FS directory structure and the files.
*/
void
mwifiex_dev_debugfs_remove(struct mwifiex_private *priv)
{
if (!priv)
return;
debugfs_remove_recursive(priv->dfs_dev_dir);
}
/*
* This function creates the top level proc directory.
*/
void
mwifiex_debugfs_init(void)
{
if (!mwifiex_dfs_dir)
mwifiex_dfs_dir = debugfs_create_dir("mwifiex", NULL);
}
/*
* This function removes the top level proc directory.
*/
void
mwifiex_debugfs_remove(void)
{
if (mwifiex_dfs_dir)
debugfs_remove(mwifiex_dfs_dir);
}
