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Date:   Wed, 15 Jan 2020 13:54:32 +0000
From:   Jérôme Pouiller <Jerome.Pouiller@...abs.com>
To:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jérôme Pouiller <Jerome.Pouiller@...abs.com>
Subject: [PATCH v2 21/65] staging: wfx: simplify update of DTIM period

From: Jérôme Pouiller <jerome.pouiller@...abs.com>

Current code parse the TIM and retrieve the DTIM period. It is far
easier to rely on bss_info_changed() for this job.

It is no more necessary to run task asynchronously. So
set_beacon_wakeup_period_work is now useless.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/data_rx.c | 14 --------------
 drivers/staging/wfx/sta.c     | 19 ++++++-------------
 drivers/staging/wfx/wfx.h     |  2 --
 3 files changed, 6 insertions(+), 29 deletions(-)

diff --git a/drivers/staging/wfx/data_rx.c b/drivers/staging/wfx/data_rx.c
index d460c0ffca1f..0ab71c911f84 100644
--- a/drivers/staging/wfx/data_rx.c
+++ b/drivers/staging/wfx/data_rx.c
@@ -173,20 +173,6 @@ void wfx_rx_cb(struct wfx_vif *wvif,
 	    !arg->status && wvif->vif &&
 	    ether_addr_equal(ieee80211_get_SA(frame),
 			     wvif->vif->bss_conf.bssid)) {
-		const u8 *tim_ie;
-		u8 *ies = mgmt->u.beacon.variable;
-		size_t ies_len = skb->len - (ies - skb->data);
-
-		tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies, ies_len);
-		if (tim_ie) {
-			struct ieee80211_tim_ie *tim = (struct ieee80211_tim_ie *)&tim_ie[2];
-
-			if (wvif->dtim_period != tim->dtim_period) {
-				wvif->dtim_period = tim->dtim_period;
-				schedule_work(&wvif->set_beacon_wakeup_period_work);
-			}
-		}
-
 		/* Disable beacon filter once we're associated... */
 		if (wvif->disable_beacon_filter &&
 		    (wvif->vif->bss_conf.assoc ||
diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index ae01f7be0ddb..1af99b7930f4 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -446,15 +446,6 @@ static void wfx_bss_params_work(struct work_struct *work)
 	mutex_unlock(&wvif->wdev->conf_mutex);
 }
 
-static void wfx_set_beacon_wakeup_period_work(struct work_struct *work)
-{
-	struct wfx_vif *wvif = container_of(work, struct wfx_vif,
-					    set_beacon_wakeup_period_work);
-
-	hif_set_beacon_wakeup_period(wvif, wvif->dtim_period,
-				     wvif->dtim_period);
-}
-
 static void wfx_do_unjoin(struct wfx_vif *wvif)
 {
 	mutex_lock(&wvif->wdev->conf_mutex);
@@ -466,7 +457,6 @@ static void wfx_do_unjoin(struct wfx_vif *wvif)
 		goto done;
 
 	cancel_work_sync(&wvif->update_filtering_work);
-	cancel_work_sync(&wvif->set_beacon_wakeup_period_work);
 	wvif->state = WFX_STATE_PASSIVE;
 
 	/* Unjoin is a reset. */
@@ -823,7 +813,8 @@ static void wfx_join_finalize(struct wfx_vif *wvif,
 		hif_keep_alive_period(wvif, 30 /* sec */);
 		hif_set_bss_params(wvif, &wvif->bss_params);
 		wvif->setbssparams_done = true;
-		wfx_set_beacon_wakeup_period_work(&wvif->set_beacon_wakeup_period_work);
+		hif_set_beacon_wakeup_period(wvif, info->dtim_period,
+					     info->dtim_period);
 		wfx_update_pm(wvif);
 	}
 }
@@ -872,6 +863,10 @@ void wfx_bss_info_changed(struct ieee80211_hw *hw,
 		}
 	}
 
+	if (changed & BSS_CHANGED_BEACON_INFO)
+		hif_set_beacon_wakeup_period(wvif, info->dtim_period,
+					     info->dtim_period);
+
 	/* assoc/disassoc, or maybe AID changed */
 	if (changed & BSS_CHANGED_ASSOC) {
 		wfx_tx_lock_flush(wdev);
@@ -1260,8 +1255,6 @@ int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 
 	init_completion(&wvif->set_pm_mode_complete);
 	complete(&wvif->set_pm_mode_complete);
-	INIT_WORK(&wvif->set_beacon_wakeup_period_work,
-		  wfx_set_beacon_wakeup_period_work);
 	INIT_WORK(&wvif->update_filtering_work, wfx_update_filtering_work);
 	INIT_WORK(&wvif->bss_params_work, wfx_bss_params_work);
 	INIT_WORK(&wvif->set_cts_work, wfx_set_cts_work);
diff --git a/drivers/staging/wfx/wfx.h b/drivers/staging/wfx/wfx.h
index 155dbe5704c9..d201cceec1ab 100644
--- a/drivers/staging/wfx/wfx.h
+++ b/drivers/staging/wfx/wfx.h
@@ -101,8 +101,6 @@ struct wfx_vif {
 	int			dtim_period;
 	int			beacon_int;
 	bool			enable_beacon;
-	struct work_struct	set_beacon_wakeup_period_work;
-
 	bool			filter_bssid;
 	bool			fwd_probe_req;
 	bool			disable_beacon_filter;
-- 
2.25.0

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