From f6b1154678ec73f7dd9a9fab16b402966305d452 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Thu, 19 Apr 2012 09:51:24 -0700 Subject: [PATCH] iwlwifi: add option to disable 5GHz band There are various problems happened on 5GHz band not observed on 2.4 GHz (microcode errors, queue stuck, etc... ) . Also roaming between 5GHz AP and 2GHz does not work very well. To workaround the problems add option to disable 5GHz support. This will help on environments where APs are dual-band, and devices will not try to associate on band where issues happen. Signed-off-by: Stanislaw Gruszka Signed-off-by: Wey-Yi Guy --- drivers/net/wireless/iwlwifi/iwl-agn.c | 3 +++ drivers/net/wireless/iwlwifi/iwl-drv.c | 4 ++++ drivers/net/wireless/iwlwifi/iwl-modparams.h | 2 ++ 3 files changed, 9 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c index ee47b3fcf891..00a8f954200c 100644 --- a/drivers/net/wireless/iwlwifi/iwl-agn.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn.c @@ -1307,6 +1307,9 @@ static int iwl_init_geos(struct iwl_priv *priv) priv->hw_params.sku &= ~EEPROM_SKU_CAP_BAND_52GHZ; } + if (iwlwifi_mod_params.disable_5ghz) + priv->bands[IEEE80211_BAND_5GHZ].n_channels = 0; + IWL_INFO(priv, "Tunable channels: %d 802.11bg, %d 802.11a channels\n", priv->bands[IEEE80211_BAND_2GHZ].n_channels, priv->bands[IEEE80211_BAND_5GHZ].n_channels); diff --git a/drivers/net/wireless/iwlwifi/iwl-drv.c b/drivers/net/wireless/iwlwifi/iwl-drv.c index 430cca56a7e7..3c72bad0ae56 100644 --- a/drivers/net/wireless/iwlwifi/iwl-drv.c +++ b/drivers/net/wireless/iwlwifi/iwl-drv.c @@ -1012,3 +1012,7 @@ module_param_named(auto_agg, iwlwifi_mod_params.auto_agg, bool, S_IRUGO); MODULE_PARM_DESC(auto_agg, "enable agg w/o check traffic load (default: enable)"); + +module_param_named(5ghz_disable, iwlwifi_mod_params.disable_5ghz, + bool, S_IRUGO); +MODULE_PARM_DESC(5ghz_disable, "disable 5GHz band (default: 0 [enabled])"); diff --git a/drivers/net/wireless/iwlwifi/iwl-modparams.h b/drivers/net/wireless/iwlwifi/iwl-modparams.h index 558b2e63c5cf..ca15d9af2ed2 100644 --- a/drivers/net/wireless/iwlwifi/iwl-modparams.h +++ b/drivers/net/wireless/iwlwifi/iwl-modparams.h @@ -103,6 +103,7 @@ enum iwl_power_level { * @ant_coupling: antenna coupling in dB, default = 0 * @bt_ch_announce: BT channel inhibition, default = enable * @auto_agg: enable agg. without check, default = true + * @disable_5ghz: disable 5GHz capability, default = false */ struct iwl_mod_params { int sw_crypto; @@ -119,6 +120,7 @@ struct iwl_mod_params { int ant_coupling; bool bt_ch_announce; bool auto_agg; + bool disable_5ghz; }; #endif /* #__iwl_shared_h__ */ -- 2.39.5