mwifiex: disable CAC upon radar detection event

This patch adds support to disable ongoing CAC in FW upon
detecting radar during CAC period.

Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/mwifiex/11h.c b/drivers/net/wireless/mwifiex/11h.c
index 65cd461..bb2ffd9 100644 (file)
--- a/drivers/net/wireless/mwifiex/11h.c
+++ b/drivers/net/wireless/mwifiex/11h.c
@@ -161,19 +161,38 @@ int mwifiex_cmd_issue_chan_report_request(struct mwifiex_private *priv,
        cr_req->chan_desc.chan_width = radar_params->chandef->width;
        cr_req->msec_dwell_time = cpu_to_le32(radar_params->cac_time_ms);
 
-       mwifiex_dbg(priv->adapter, MSG,
-                   "11h: issuing DFS Radar check for channel=%d\n",
-                   radar_params->chandef->chan->hw_value);
+       if (radar_params->cac_time_ms)
+               mwifiex_dbg(priv->adapter, MSG,
+                           "11h: issuing DFS Radar check for channel=%d\n",
+                           radar_params->chandef->chan->hw_value);
+       else
+               mwifiex_dbg(priv->adapter, MSG, "cancelling CAC\n");
 
        return 0;
 }
 
+int mwifiex_stop_radar_detection(struct mwifiex_private *priv,
+                                struct cfg80211_chan_def *chandef)
+{
+       struct mwifiex_radar_params radar_params;
+
+       memset(&radar_params, 0, sizeof(struct mwifiex_radar_params));
+       radar_params.chandef = chandef;
+       radar_params.cac_time_ms = 0;
+
+       return mwifiex_send_cmd(priv, HostCmd_CMD_CHAN_REPORT_REQUEST,
+                               HostCmd_ACT_GEN_SET, 0, &radar_params, true);
+}
+
 /* This function is to abort ongoing CAC upon stopping AP operations
  * or during unload.
  */
 void mwifiex_abort_cac(struct mwifiex_private *priv)
 {
        if (priv->wdev.cac_started) {
+               if (mwifiex_stop_radar_detection(priv, &priv->dfs_chandef))
+                       mwifiex_dbg(priv->adapter, ERROR,
+                                   "failed to stop CAC in FW\n");
                mwifiex_dbg(priv->adapter, MSG,
                            "Aborting delayed work for CAC.\n");
                cancel_delayed_work_sync(&priv->dfs_cac_work);
@@ -245,6 +264,9 @@ int mwifiex_11h_handle_radar_detected(struct mwifiex_private *priv,
        if (le32_to_cpu(rdr_event->passed)) {
                mwifiex_dbg(priv->adapter, MSG,
                            "radar detected; indicating kernel\n");
+               if (mwifiex_stop_radar_detection(priv, &priv->dfs_chandef))
+                       mwifiex_dbg(priv->adapter, ERROR,
+                                   "Failed to stop CAC in FW\n");
                cfg80211_radar_event(priv->adapter->wiphy, &priv->dfs_chandef,
                                     GFP_KERNEL);
                mwifiex_dbg(priv->adapter, MSG, "regdomain: %d\n",
@@ -252,7 +274,7 @@ int mwifiex_11h_handle_radar_detected(struct mwifiex_private *priv,
                mwifiex_dbg(priv->adapter, MSG, "radar detection type: %d\n",
                            rdr_event->det_type);
        } else {
-               mwifiex_dbg(priv->adapter, ERROR,
+               mwifiex_dbg(priv->adapter, MSG,
                            "false radar detection event!\n");
        }
 

diff --git a/drivers/net/wireless/mwifiex/main.h b/drivers/net/wireless/mwifiex/main.h
index 5a6c1c7..3ac18c6 100644 (file)
--- a/drivers/net/wireless/mwifiex/main.h
+++ b/drivers/net/wireless/mwifiex/main.h
@@ -1473,6 +1473,8 @@ mwifiex_clone_skb_for_tx_status(struct mwifiex_private *priv,
 void mwifiex_dfs_cac_work_queue(struct work_struct *work);
 void mwifiex_dfs_chan_sw_work_queue(struct work_struct *work);
 void mwifiex_abort_cac(struct mwifiex_private *priv);
+int mwifiex_stop_radar_detection(struct mwifiex_private *priv,
+                                struct cfg80211_chan_def *chandef);
 int mwifiex_11h_handle_radar_detected(struct mwifiex_private *priv,
                                      struct sk_buff *skb);