From: Johannes Berg Date: Fri, 11 Sep 2009 17:50:37 +0000 (-0700) Subject: iwlwifi: disable powersave for 4965 X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=559a4741b8a5b4551b8c7e8e0de7f3e41a79bb5a;p=deliverable%2Flinux.git iwlwifi: disable powersave for 4965 There's a bug in 4965 powersave that appears to be related to the way it keeps track of its data during sleep, but we haven't found it yet. Due to that, using powersave may spontaneously cause the device to SYSASSERT when transitioning from sleep to wake. Therefore, disable powersave for 4965, until (if ever, unfortunately) we can identify and fix the problem. Cf. http://bugzilla.intellinuxwireless.org/show_bug.cgi?id=1982 which was closed, but now has re-appeared with IDLE mode, which probably means we never really fixed it. Signed-off-by: Johannes Berg Signed-off-by: Reinette Chatre Signed-off-by: John W. Linville --- diff --git a/drivers/net/wireless/iwlwifi/iwl-4965.c b/drivers/net/wireless/iwlwifi/iwl-4965.c index 6a13bfbc9d98..ca61d3796cef 100644 --- a/drivers/net/wireless/iwlwifi/iwl-4965.c +++ b/drivers/net/wireless/iwlwifi/iwl-4965.c @@ -2346,6 +2346,7 @@ struct iwl_cfg iwl4965_agn_cfg = { .mod_params = &iwl4965_mod_params, .use_isr_legacy = true, .ht_greenfield_support = false, + .broken_powersave = true, }; /* Module firmware */ diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index acfd7b40afb8..fd26c0dc9c54 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -1585,9 +1585,12 @@ int iwl_setup_mac(struct iwl_priv *priv) hw->flags = IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM | IEEE80211_HW_AMPDU_AGGREGATION | - IEEE80211_HW_SPECTRUM_MGMT | - IEEE80211_HW_SUPPORTS_PS | - IEEE80211_HW_SUPPORTS_DYNAMIC_PS; + IEEE80211_HW_SPECTRUM_MGMT; + + if (!priv->cfg->broken_powersave) + hw->flags |= IEEE80211_HW_SUPPORTS_PS | + IEEE80211_HW_SUPPORTS_DYNAMIC_PS; + hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) | BIT(NL80211_IFTYPE_ADHOC); diff --git a/drivers/net/wireless/iwlwifi/iwl-core.h b/drivers/net/wireless/iwlwifi/iwl-core.h index c04d2a270819..7ff9ffb2b702 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.h +++ b/drivers/net/wireless/iwlwifi/iwl-core.h @@ -252,6 +252,7 @@ struct iwl_cfg { const u16 max_ll_items; const bool shadow_ram_support; const bool ht_greenfield_support; + const bool broken_powersave; }; /*************************** diff --git a/drivers/net/wireless/iwlwifi/iwl-power.c b/drivers/net/wireless/iwlwifi/iwl-power.c index 4ec6a8307cc6..60be976afff8 100644 --- a/drivers/net/wireless/iwlwifi/iwl-power.c +++ b/drivers/net/wireless/iwlwifi/iwl-power.c @@ -292,8 +292,9 @@ int iwl_power_update_mode(struct iwl_priv *priv, bool force) else dtimper = 1; - /* TT power setting overwrites everything */ - if (tt->state >= IWL_TI_1) + if (priv->cfg->broken_powersave) + iwl_power_sleep_cam_cmd(priv, &cmd); + else if (tt->state >= IWL_TI_1) iwl_static_sleep_cmd(priv, &cmd, tt->tt_power_mode, dtimper); else if (!enabled) iwl_power_sleep_cam_cmd(priv, &cmd);