[PATCH 2/8] iwlwifi: mvm: implement CSA abort

[Luca Coelho <luca@coelho.fi>]

From: Sara Sharon <sara.sharon@intel.com>

In case we receive abort operation for CSA, clean up
our state.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 .../net/wireless/intel/iwlwifi/mvm/mac80211.c | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
index 1bdc27d07d74..b5a9e83cc034 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c
@@ -4631,6 +4631,29 @@ static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
 	return ret;
 }
 
+static void iwl_mvm_abort_channel_switch(struct ieee80211_hw *hw,
+					 struct ieee80211_vif *vif)
+{
+	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	struct iwl_chan_switch_te_cmd cmd = {
+		.mac_id = cpu_to_le32(FW_CMD_ID_AND_COLOR(mvmvif->id,
+							  mvmvif->color)),
+		.action = cpu_to_le32(FW_CTXT_ACTION_REMOVE),
+	};
+
+	IWL_DEBUG_MAC80211(mvm, "Abort CSA on mac %d\n", mvmvif->id);
+
+	mutex_lock(&mvm->mutex);
+	WARN_ON(iwl_mvm_send_cmd_pdu(mvm,
+				     WIDE_ID(MAC_CONF_GROUP,
+					     CHANNEL_SWITCH_TIME_EVENT_CMD),
+				     0, sizeof(cmd), &cmd));
+	mutex_unlock(&mvm->mutex);
+
+	WARN_ON(iwl_mvm_post_channel_switch(hw, vif));
+}
+
 static void iwl_mvm_flush_no_vif(struct iwl_mvm *mvm, u32 queues, bool drop)
 {
 	int i;
@@ -5087,6 +5110,7 @@ const struct ieee80211_ops iwl_mvm_hw_ops = {
 	.channel_switch = iwl_mvm_channel_switch,
 	.pre_channel_switch = iwl_mvm_pre_channel_switch,
 	.post_channel_switch = iwl_mvm_post_channel_switch,
+	.abort_channel_switch = iwl_mvm_abort_channel_switch,
 
 	.tdls_channel_switch = iwl_mvm_tdls_channel_switch,
 	.tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
-- 
2.20.1