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iwlwifi: mvm: add a channel_switch op to bypass mac80211 timer

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We need to call ieee80211_chswitch_done() ourselves just when the
absence TE started, so we perform the actual context switch early
enough.  To do so, add a dummy channel_switch op, which will cause
mac80211 to skip the countdown timer and allow us to call
ieee80211_chswitch_done() to complete the operation.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
This commit is contained in:
Luciano Coelho 2014-11-10 11:10:17 +02:00 • committed by Emmanuel Grumbach
parent a57c688d34
commit 622e3f9b71
2 changed files with 16 additions and 0 deletions
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15
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View file

@ -3143,6 +3143,20 @@ static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
} }
#endif #endif
static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_channel_switch *chsw)
{
/* By implementing this operation, we prevent mac80211 from
* starting its own channel switch timer, so that we can call
* ieee80211_chswitch_done() ourselves at the right time
* (which is when the absence time event starts).
*/
IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
"dummy channel switch op\n");
}
static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw, static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
struct ieee80211_vif *vif, struct ieee80211_vif *vif,
struct ieee80211_channel_switch *chsw) struct ieee80211_channel_switch *chsw)
@ -3336,6 +3350,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
.set_tim = iwl_mvm_set_tim, .set_tim = iwl_mvm_set_tim,
.channel_switch = iwl_mvm_channel_switch,
.pre_channel_switch = iwl_mvm_pre_channel_switch, .pre_channel_switch = iwl_mvm_pre_channel_switch,
.post_channel_switch = iwl_mvm_post_channel_switch, .post_channel_switch = iwl_mvm_post_channel_switch,

1
drivers/net/wireless/iwlwifi/mvm/time-event.c
View file

@ -207,6 +207,7 @@ iwl_mvm_te_handle_notify_csa(struct iwl_mvm *mvm,
break; break;
case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_STATION:
iwl_mvm_csa_client_absent(mvm, te_data->vif); iwl_mvm_csa_client_absent(mvm, te_data->vif);
ieee80211_chswitch_done(te_data->vif, true);
break; break;
default: default:
/* should never happen */ /* should never happen */