iwlwifi: mvm: delay enabling smart FIFO until after beacon RX

commit 0229cdafb6f67064a217591d48b0f6abf14e8385 upstream.

If we have no beacon data before association, delay smart FIFO
enablement until after we have this data.

Not doing so can cause association failures in extremely silent
environments (usually only a shielded box/room) as beacon RX is
not sent to the host immediately, and then the association time
event ends without the host receiving any beacon even though it
was on the air - it's just stuck on the FIFO.

Fixes: 1f3b0ff8ecce ("iwlwifi: mvm: Add Smart FIFO support")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/wireless/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
index 9a856e5..c5b086c 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/iwlwifi/mvm/mac80211.c
@@ -971,6 +971,7 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
                 */
                iwl_mvm_remove_time_event(mvm, mvmvif,
                                          &mvmvif->time_event_data);
+               iwl_mvm_sf_update(mvm, vif, false);
        } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
                              BSS_CHANGED_QOS)) {
                ret = iwl_mvm_power_update_mode(mvm, vif);

diff --git a/drivers/net/wireless/iwlwifi/mvm/sf.c b/drivers/net/wireless/iwlwifi/mvm/sf.c
index 8401627..88809b2 100644 (file)
--- a/drivers/net/wireless/iwlwifi/mvm/sf.c
+++ b/drivers/net/wireless/iwlwifi/mvm/sf.c
@@ -274,7 +274,8 @@ int iwl_mvm_sf_update(struct iwl_mvm *mvm, struct ieee80211_vif *changed_vif,
                                return -EINVAL;
                        if (changed_vif->type != NL80211_IFTYPE_STATION) {
                                new_state = SF_UNINIT;
-                       } else if (changed_vif->bss_conf.assoc) {
+                       } else if (changed_vif->bss_conf.assoc &&
+                                  changed_vif->bss_conf.dtim_period) {
                                mvmvif = iwl_mvm_vif_from_mac80211(changed_vif);
                                sta_id = mvmvif->ap_sta_id;
                                new_state = SF_FULL_ON;