staging: wfx: simplify hif_set_pm() usage

The struct hif_req_set_pm_mode comes from hardware API. It is not
intended to be manipulated in upper layers of the driver. So, this patch
relocate the handling of this struct to hif_set_pm() (the low level
function).
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191217161318.31402-41-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/hif_tx.c

@@ -360,13 +360,19 @@ int hif_set_edca_queue_params(struct wfx_vif *wvif,
 	return ret;
 }
 
-int hif_set_pm(struct wfx_vif *wvif, const struct hif_req_set_pm_mode *arg)
+int hif_set_pm(struct wfx_vif *wvif, bool ps, int dynamic_ps_timeout)
 {
 	int ret;
 	struct hif_msg *hif;
 	struct hif_req_set_pm_mode *body = wfx_alloc_hif(sizeof(*body), &hif);
 
-	memcpy(body, arg, sizeof(*body));
+	if (ps) {
+		body->pm_mode.enter_psm = 1;
+		// Firmware does not support more than 128ms
+		body->fast_psm_idle_period = min(dynamic_ps_timeout * 2, 255);
+		if (body->fast_psm_idle_period)
+			body->pm_mode.fast_psm = 1;
+	}
 	wfx_fill_header(hif, wvif->id, HIF_REQ_ID_SET_PM_MODE, sizeof(*body));
 	ret = wfx_cmd_send(wvif->wdev, hif, NULL, 0, false);
 	kfree(hif);

drivers/staging/wfx/hif_tx.h

@@ -47,7 +47,7 @@ int hif_write_mib(struct wfx_dev *wdev, int vif_id, u16 mib_id,
 int hif_scan(struct wfx_vif *wvif, const struct wfx_scan_params *arg);
 int hif_stop_scan(struct wfx_vif *wvif);
 int hif_join(struct wfx_vif *wvif, const struct hif_req_join *arg);
-int hif_set_pm(struct wfx_vif *wvif, const struct hif_req_set_pm_mode *arg);
+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);
 int hif_add_key(struct wfx_dev *wdev, const struct hif_req_add_key *arg);

drivers/staging/wfx/sta.c

@@ -291,37 +291,30 @@ void wfx_configure_filter(struct ieee80211_hw *hw,
 static int wfx_update_pm(struct wfx_vif *wvif)
 {
 	struct ieee80211_conf *conf = &wvif->wdev->hw->conf;
-	struct hif_req_set_pm_mode pm;
+	bool ps = conf->flags & IEEE80211_CONF_PS;
+	int ps_timeout = conf->dynamic_ps_timeout;
 
+	WARN_ON(conf->dynamic_ps_timeout < 0);
 	if (wvif->state != WFX_STATE_STA || !wvif->bss_params.aid)
 		return 0;
-
-	memset(&pm, 0, sizeof(pm));
-	if (conf->flags & IEEE80211_CONF_PS) {
-		pm.pm_mode.enter_psm = 1;
-		// Firmware does not support more than 128ms
-		pm.fast_psm_idle_period =
-			min(conf->dynamic_ps_timeout * 2, 255);
-		if (pm.fast_psm_idle_period)
-			pm.pm_mode.fast_psm = 1;
-	}
-
+	if (!ps)
+		ps_timeout = 0;
 	if (wvif->edca.uapsd_mask)
-		pm.pm_mode.fast_psm = 0;
+		ps_timeout = 0;
 
 	// Kernel disable PowerSave when multiple vifs are in use. In contrary,
 	// it is absolutly necessary to enable PowerSave for WF200
 	// FIXME: only if channel vif0 != channel vif1
 	if (wvif_count(wvif->wdev) > 1) {
-		pm.pm_mode.enter_psm = 1;
-		pm.pm_mode.fast_psm = 0;
+		ps = true;
+		ps_timeout = 0;
 	}
 
 	if (!wait_for_completion_timeout(&wvif->set_pm_mode_complete,
 					 TU_TO_JIFFIES(512)))
 		dev_warn(wvif->wdev->dev,
 			 "timeout while waiting of set_pm_mode_complete\n");
-	return hif_set_pm(wvif, &pm);
+	return hif_set_pm(wvif, ps, ps_timeout);
 }
 
 int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,