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iwlwifi: use scan while idle 

As idle is just a deep powersave mode for
the device, it will easily scan while idle
since that turns off powersave.

This reduces the number of commands sent
to the device when scanning.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2012-03-15 13:26:51 -07:00 committed by John W. Linville
parent 6a22f10c45
commit e561038237
2 changed files with 8 additions and 3 deletions
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3
drivers/net/wireless/iwlwifi/iwl-mac80211.c
View File

@ -157,7 +157,8 @@ int iwlagn_mac_setup_register(struct iwl_priv *priv,
*/
hw->flags |= IEEE80211_HW_SUPPORTS_PS |
IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
IEEE80211_HW_SCAN_WHILE_IDLE;
if (hw_params(priv).sku & EEPROM_SKU_CAP_11N_ENABLE)
hw->flags |= IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |

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

@ -806,8 +806,12 @@ static int iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif)
rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]);
scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags);
/* In power save mode use one chain, otherwise use all chains */
if (test_bit(STATUS_POWER_PMI, &priv->shrd->status)) {
/*
* In power save mode while associated use one chain,
* otherwise use all chains
*/
if (test_bit(STATUS_POWER_PMI, &priv->shrd->status) &&
!(priv->hw->conf.flags & IEEE80211_CONF_IDLE)) {
/* rx_ant has been set to all valid chains previously */
active_chains = rx_ant &
((u8)(priv->chain_noise_data.active_chains));