wcn36xx: handle scan cancellation when firmware support is missing

For firmwares that don't have the SCAN_OFFLOAD feature bit set, do
not call into wcn36xx_smd_stop_hw_scan(). Instead, stop the asynchronous
work and call into ieee80211_scan_completed() immediately.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/wcn36xx/main.c

@@ -687,10 +687,18 @@ static void wcn36xx_cancel_hw_scan(struct ieee80211_hw *hw,
 	wcn->scan_aborted = true;
 	mutex_unlock(&wcn->scan_lock);
 
-	/* ieee80211_scan_completed will be called on FW scan indication */
-	wcn36xx_smd_stop_hw_scan(wcn);
+	if (get_feat_caps(wcn->fw_feat_caps, SCAN_OFFLOAD)) {
+		/* ieee80211_scan_completed will be called on FW scan
+		 * indication */
+		wcn36xx_smd_stop_hw_scan(wcn);
+	} else {
+		struct cfg80211_scan_info scan_info = {
+			.aborted = true,
+		};
 
-	cancel_work_sync(&wcn->scan_work);
+		cancel_work_sync(&wcn->scan_work);
+		ieee80211_scan_completed(wcn->hw, &scan_info);
+	}
 }
 
 static void wcn36xx_update_allowed_rates(struct ieee80211_sta *sta,