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iwlwifi: Fix A band scanning when associated

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This patch allows A band to be scanned when driver is associated to AP.
Scan mechanism is that mac80211/cfg80211 requests driver to scan G band
first and then immediately to scan A band. Original code require
driver to wait for 2 seconds after any scan before another scan will be
performed. This caused driver to service G band scan request from
mac80211/cfg80211 but deny the A band scan request.

Signed-off-by: Henry Zhangh <hongx.c.zhang@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:
Henry Zhangh 2010-01-22 14:22:44 -08:00 committed by John W. Linville
parent afbdd69af0
commit 220575f78f
2 changed files with 2 additions and 16 deletions
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1
drivers/net/wireless/iwlwifi/iwl-dev.h
View file

@ -1072,7 +1072,6 @@ struct iwl_priv {
struct iwl_calib_result calib_results[IWL_CALIB_MAX];
/* Scan related variables */
unsigned long last_scan_jiffies;
unsigned long next_scan_jiffies;
unsigned long scan_start;
unsigned long scan_pass_start;

17
drivers/net/wireless/iwlwifi/iwl-scan.c
View file

@ -192,18 +192,15 @@ static void iwl_rx_scan_results_notif(struct iwl_priv *priv,
IWL_DEBUG_SCAN(priv, "Scan ch.res: "
"%d [802.11%s] "
"(TSF: 0x%08X:%08X) - %d "
"elapsed=%lu usec (%dms since last)\n",
"elapsed=%lu usec\n",
notif->channel,
notif->band ? "bg" : "a",
le32_to_cpu(notif->tsf_high),
le32_to_cpu(notif->tsf_low),
le32_to_cpu(notif->statistics[0]),
le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf,
jiffies_to_msecs(elapsed_jiffies
(priv->last_scan_jiffies, jiffies)));
le32_to_cpu(notif->tsf_low) - priv->scan_start_tsf);
#endif
priv->last_scan_jiffies = jiffies;
priv->next_scan_jiffies = 0;
}
@ -250,7 +247,6 @@ static void iwl_rx_scan_complete_notif(struct iwl_priv *priv,
goto reschedule;
}
priv->last_scan_jiffies = jiffies;
priv->next_scan_jiffies = 0;
IWL_DEBUG_INFO(priv, "Setting scan to off\n");
@ -528,15 +524,6 @@ int iwl_mac_hw_scan(struct ieee80211_hw *hw,
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(priv, "scan rejected: within previous scan period\n");
queue_work(priv->workqueue, &priv->scan_completed);
ret = 0;
goto out_unlock;
}
priv->scan_bands = 0;
for (i = 0; i < req->n_channels; i++)
priv->scan_bands |= BIT(req->channels[i]->band);