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iwlwifi: allow user change protection mechanism for HT 

Allow user to change protection mechanism for HT between RTS/CTS and
CTS-to-self through sysfs:

Show current protection mechanism for HT
   cat /sys/class/net/wlan0/device/rts_ht_protection

Change protection mechanism for HT (only allowed while not-associated)
CTS-to-self:
   echo 0 > /sys/class/net/wlan0/device/rts_ht_protection
RTS/CTS:
   echo 1 > /sys/class/net/wlan0/device/rts_ht_protection

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2009-09-17 10:43:45 -07:00 committed by John W. Linville
parent 47eef9bd10
commit 01abfbb282
1 changed files with 35 additions and 0 deletions
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35
drivers/net/wireless/iwlwifi/iwl-agn.c
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@ -2798,6 +2798,40 @@ static ssize_t show_statistics(struct device *d,
static DEVICE_ATTR(statistics, S_IRUGO, show_statistics, NULL);
static ssize_t show_rts_ht_protection(struct device *d,
struct device_attribute *attr, char *buf)
{
struct iwl_priv *priv = dev_get_drvdata(d);
return sprintf(buf, "%s\n",
priv->cfg->use_rts_for_ht ? "RTS/CTS" : "CTS-to-self");
}
static ssize_t store_rts_ht_protection(struct device *d,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct iwl_priv *priv = dev_get_drvdata(d);
unsigned long val;
int ret;
ret = strict_strtoul(buf, 10, &val);
if (ret)
IWL_INFO(priv, "Input is not in decimal form.\n");
else {
if (!iwl_is_associated(priv))
priv->cfg->use_rts_for_ht = val ? true : false;
else
IWL_ERR(priv, "Sta associated with AP - "
"Change protection mechanism is not allowed\n");
ret = count;
}
return ret;
}
static DEVICE_ATTR(rts_ht_protection, S_IWUSR | S_IRUGO,
show_rts_ht_protection, store_rts_ht_protection);
/*****************************************************************************
*
@ -2854,6 +2888,7 @@ static struct attribute *iwl_sysfs_entries[] = {
&dev_attr_statistics.attr,
&dev_attr_temperature.attr,
&dev_attr_tx_power.attr,
&dev_attr_rts_ht_protection.attr,
#ifdef CONFIG_IWLWIFI_DEBUG
&dev_attr_debug_level.attr,
#endif