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Commit 8d09a5e1 authored by Tomas Winkler's avatar Tomas Winkler Committed by John W. Linville
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iwlwifi: don't fail if scan is issued too early 



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: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarZhu Yi <yi.zhu@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 55d6a3cd

drivers/net/wireless/iwlwifi/iwl-agn.c

+11 −4
Original line number Diff line number Diff line
@@ -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);

drivers/net/wireless/iwlwifi/iwl-scan.c

+1 −7
Original line number Diff line number Diff line
@@ -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;

	}