staging: wfx: simplify hif_join()

The structure hif_req_join come from hardware API. It is not intended
to be manipulated in upper layers of the driver.

In add, current code for hif_join() is too dumb. It should pack data
with hardware representation instead of leaving all work to the caller.
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200115135338.14374-30-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/hif_tx.c

@@ -288,18 +288,29 @@ int hif_stop_scan(struct wfx_vif *wvif)
 	return ret;
 }
 
-int hif_join(struct wfx_vif *wvif, const struct hif_req_join *arg)
+int hif_join(struct wfx_vif *wvif, const struct ieee80211_bss_conf *conf,
+	     const struct ieee80211_channel *channel, const u8 *ssidie)
 {
 	int ret;
 	struct hif_msg *hif;
 	struct hif_req_join *body = wfx_alloc_hif(sizeof(*body), &hif);
 
-	memcpy(body, arg, sizeof(struct hif_req_join));
-	cpu_to_le16s(&body->channel_number);
-	cpu_to_le16s(&body->atim_window);
-	cpu_to_le32s(&body->ssid_length);
-	cpu_to_le32s(&body->beacon_interval);
-	cpu_to_le32s(&body->basic_rate_set);
+	WARN_ON(!conf->basic_rates);
+	body->infrastructure_bss_mode = !conf->ibss_joined;
+	body->short_preamble = conf->use_short_preamble;
+	if (channel && channel->flags & IEEE80211_CHAN_NO_IR)
+		body->probe_for_join = 0;
+	else
+		body->probe_for_join = 1;
+	body->channel_number = cpu_to_le16(channel->hw_value);
+	body->beacon_interval = cpu_to_le32(conf->beacon_int);
+	body->basic_rate_set =
+		cpu_to_le32(wfx_rate_mask_to_hw(wvif->wdev, conf->basic_rates));
+	memcpy(body->bssid, conf->bssid, sizeof(body->bssid));
+	if (!conf->ibss_joined && ssidie) {
+		body->ssid_length = cpu_to_le32(ssidie[1]);
+		memcpy(body->ssid, &ssidie[2], ssidie[1]);
+	}
 	wfx_fill_header(hif, wvif->id, HIF_REQ_ID_JOIN, sizeof(*body));
 	ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false);
 	kfree(hif);

drivers/staging/wfx/hif_tx.h

@@ -45,7 +45,8 @@ int hif_write_mib(struct wfx_dev *wdev, int vif_id, u16 mib_id,
 int hif_scan(struct wfx_vif *wvif, struct cfg80211_scan_request *req80211,
 	     int chan_start, int chan_num);
 int hif_stop_scan(struct wfx_vif *wvif);
-int hif_join(struct wfx_vif *wvif, const struct hif_req_join *arg);
+int hif_join(struct wfx_vif *wvif, const struct ieee80211_bss_conf *conf,
+	     const struct ieee80211_channel *channel, const u8 *ssidie);
 int hif_set_pm(struct wfx_vif *wvif, bool ps, int dynamic_ps_timeout);
 int hif_set_bss_params(struct wfx_vif *wvif,
 		       const struct hif_req_set_bss_params *arg);

drivers/staging/wfx/sta.c

@@ -512,32 +512,19 @@ static void wfx_set_mfp(struct wfx_vif *wvif,
 
 static void wfx_do_join(struct wfx_vif *wvif)
 {
-	const u8 *bssid;
+	int ret;
+	const u8 *ssidie;
 	struct ieee80211_bss_conf *conf = &wvif->vif->bss_conf;
 	struct cfg80211_bss *bss = NULL;
-	struct hif_req_join join = {
-		.infrastructure_bss_mode = !conf->ibss_joined,
-		.short_preamble = conf->use_short_preamble,
-		.probe_for_join = 1,
-		.atim_window = 0,
-		.basic_rate_set = wfx_rate_mask_to_hw(wvif->wdev,
-						      conf->basic_rates),
-	};
 
 	wfx_tx_lock_flush(wvif->wdev);
 
-	if (wvif->channel->flags & IEEE80211_CHAN_NO_IR)
-		join.probe_for_join = 0;
-
 	if (wvif->state)
 		wfx_do_unjoin(wvif);
 
-	bssid = wvif->vif->bss_conf.bssid;
-
 	bss = cfg80211_get_bss(wvif->wdev->hw->wiphy, wvif->channel,
-			       bssid, NULL, 0,
+			       conf->bssid, NULL, 0,
 			       IEEE80211_BSS_TYPE_ANY, IEEE80211_PRIVACY_ANY);
-
 	if (!bss && !conf->ibss_joined) {
 		wfx_tx_unlock(wvif->wdev);
 		return;
@@ -545,29 +532,15 @@ static void wfx_do_join(struct wfx_vif *wvif)
 
 	mutex_lock(&wvif->wdev->conf_mutex);
 
-	/* Sanity check basic rates */
-	if (!join.basic_rate_set)
-		join.basic_rate_set = 7;
-
 	/* Sanity check beacon interval */
 	if (!wvif->beacon_int)
 		wvif->beacon_int = 1;
 
-	join.beacon_interval = wvif->beacon_int;
-	join.channel_number = wvif->channel->hw_value;
-	memcpy(join.bssid, bssid, sizeof(join.bssid));
-
-	if (!conf->ibss_joined) {
-		const u8 *ssidie;
-
 	rcu_read_lock();
+	if (!conf->ibss_joined)
 		ssidie = ieee80211_bss_get_ie(bss, WLAN_EID_SSID);
-		if (ssidie) {
-			join.ssid_length = ssidie[1];
-			memcpy(join.ssid, &ssidie[2], join.ssid_length);
-		}
-		rcu_read_unlock();
-	}
+	else
+		ssidie = NULL;
 
 	wfx_tx_flush(wvif->wdev);
 
@@ -578,7 +551,9 @@ static void wfx_do_join(struct wfx_vif *wvif)
 
 	/* Perform actual join */
 	wvif->wdev->tx_burst_idx = -1;
-	if (hif_join(wvif, &join)) {
+	ret = hif_join(wvif, conf, wvif->channel, ssidie);
+	rcu_read_unlock();
+	if (ret) {
 		ieee80211_connection_loss(wvif->vif);
 		wvif->join_complete_status = -1;
 		/* Tx lock still held, unjoin will clear it. */