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iwlwifi: don't fail if scan is issued too early

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This patch returns success and empty scan on scans requests that were
rejected because issued too early. The cached bss list from previous
scanning will be returned by mac80211.

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Tomas Winkler 2008-09-24 13:57:46 +08:00 committed by John W. Linville
parent 55d6a3cd0c
commit 8d09a5e1c3
2 changed files with 12 additions and 11 deletions
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15
drivers/net/wireless/iwlwifi/iwl-agn.c
View file

@ -3190,9 +3190,9 @@ static void iwl4965_bss_info_changed(struct ieee80211_hw *hw,
static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
{
int ret;
unsigned long flags;
struct iwl_priv *priv = hw->priv;
int ret;
IWL_DEBUG_MAC80211("enter\n");
@ -3211,20 +3211,27 @@ static int iwl_mac_hw_scan(struct ieee80211_hw *hw, u8 *ssid, size_t ssid_len)
goto out_unlock;
}
/* we don't schedule scan within next_scan_jiffies period */
/* We don't schedule scan within next_scan_jiffies period.
* Avoid scanning during possible EAPOL exchange, return
* success immediately.
*/
if (priv->next_scan_jiffies &&
time_after(priv->next_scan_jiffies, jiffies)) {
IWL_DEBUG_SCAN("scan rejected: within next scan period\n");
ret = -EAGAIN;
queue_work(priv->workqueue, &priv->scan_completed);
ret = 0;
goto out_unlock;
}
/* if we just finished scan ask for delay */
if (iwl_is_associated(priv) && priv->last_scan_jiffies &&
time_after(priv->last_scan_jiffies + IWL_DELAY_NEXT_SCAN, jiffies)) {
IWL_DEBUG_SCAN("scan rejected: within previous scan period\n");
ret = -EAGAIN;
queue_work(priv->workqueue, &priv->scan_completed);
ret = 0;
goto out_unlock;
}
if (ssid_len) {
priv->one_direct_scan = 1;
priv->direct_ssid_len = min_t(u8, ssid_len, IW_ESSID_MAX_SIZE);

8
drivers/net/wireless/iwlwifi/iwl-scan.c
View file

@ -463,11 +463,6 @@ void iwl_init_scan_params(struct iwl_priv *priv)
int iwl_scan_initiate(struct iwl_priv *priv)
{
if (priv->iw_mode == NL80211_IFTYPE_AP) {
IWL_ERROR("APs don't scan.\n");
return 0;
}
if (!iwl_is_ready_rf(priv)) {
IWL_DEBUG_SCAN("Aborting scan due to not ready.\n");
return -EIO;
@ -479,8 +474,7 @@ int iwl_scan_initiate(struct iwl_priv *priv)
}
if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) {
IWL_DEBUG_SCAN("Scan request while abort pending. "
"Queuing.\n");
IWL_DEBUG_SCAN("Scan request while abort pending\n");
return -EAGAIN;
}