[PATCH v2 54/55] staging: wfx: implement cancel_hw_scan()

[Jérôme Pouiller]

From: Jérôme Pouiller <jerome.pouil...@silabs.com>

The device provides an API to abort a scan request. Expose this feature
to mac80211.

Signed-off-by: Jérôme Pouiller <jerome.pouil...@silabs.com>
---
 drivers/staging/wfx/main.c |  1 +
 drivers/staging/wfx/scan.c | 13 +++++++++++++
 drivers/staging/wfx/scan.h |  1 +
 drivers/staging/wfx/wfx.h  |  1 +
 4 files changed, 16 insertions(+)

diff --git a/drivers/staging/wfx/main.c b/drivers/staging/wfx/main.c
index cf4bcb14a12d..45c9939b7e62 100644
--- a/drivers/staging/wfx/main.c
+++ b/drivers/staging/wfx/main.c
@@ -135,6 +135,7 @@ static const struct ieee80211_ops wfx_ops = {
        .tx                     = wfx_tx,
        .conf_tx                = wfx_conf_tx,
        .hw_scan                = wfx_hw_scan,
+       .cancel_hw_scan         = wfx_cancel_hw_scan,
        .sta_add                = wfx_sta_add,
        .sta_remove             = wfx_sta_remove,
        .sta_notify             = wfx_sta_notify,
diff --git a/drivers/staging/wfx/scan.c b/drivers/staging/wfx/scan.c
index dde2f8868147..24061d09c404 100644
--- a/drivers/staging/wfx/scan.c
+++ b/drivers/staging/wfx/scan.c
@@ -54,6 +54,7 @@ static int send_scan_req(struct wfx_vif *wvif,
                        break;
        }
        wfx_tx_lock_flush(wvif->wdev);
+       wvif->scan_abort = false;
        reinit_completion(&wvif->scan_complete);
        ret = hif_scan(wvif, req, start_idx, i - start_idx);
        if (ret < 0)
@@ -68,6 +69,10 @@ static int send_scan_req(struct wfx_vif *wvif,
                hif_stop_scan(wvif);
                return -ETIMEDOUT;
        }
+       if (wvif->scan_abort) {
+               dev_notice(wvif->wdev->dev, "scan abort\n");
+               return -ECONNABORTED;
+       }
        return i - start_idx;
 }
 
@@ -115,6 +120,14 @@ int wfx_hw_scan(struct ieee80211_hw *hw, struct 
ieee80211_vif *vif,
        return 0;
 }
 
+void wfx_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
+{
+       struct wfx_vif *wvif = (struct wfx_vif *)vif->drv_priv;
+
+       wvif->scan_abort = true;
+       hif_stop_scan(wvif);
+}
+
 void wfx_scan_complete(struct wfx_vif *wvif,
                       const struct hif_ind_scan_cmpl *arg)
 {
diff --git a/drivers/staging/wfx/scan.h b/drivers/staging/wfx/scan.h
index b547f1927d72..bba9f15a9ff5 100644
--- a/drivers/staging/wfx/scan.h
+++ b/drivers/staging/wfx/scan.h
@@ -18,6 +18,7 @@ struct wfx_vif;
 void wfx_hw_scan_work(struct work_struct *work);
 int wfx_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
                struct ieee80211_scan_request *req);
+void wfx_cancel_hw_scan(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
 void wfx_scan_complete(struct wfx_vif *wvif,
                       const struct hif_ind_scan_cmpl *ind);
 
diff --git a/drivers/staging/wfx/wfx.h b/drivers/staging/wfx/wfx.h
index db433bee87af..0a3df382af03 100644
--- a/drivers/staging/wfx/wfx.h
+++ b/drivers/staging/wfx/wfx.h
@@ -127,6 +127,7 @@ struct wfx_vif {
        struct mutex            scan_lock;
        struct work_struct      scan_work;
        struct completion       scan_complete;
+       bool                    scan_abort;
        struct ieee80211_scan_request *scan_req;
 
        struct completion       set_pm_mode_complete;
-- 
2.24.0

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