linux-kernel - [PATCH 05/17] staging: wfx: fix CAB sent at the wrong time

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Message-Id: <20200427134031.323403-6-Jerome.Pouiller@silabs.com>
Date:   Mon, 27 Apr 2020 15:40:19 +0200
From:   Jerome Pouiller <Jerome.Pouiller@...abs.com>
To:     devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org
Cc:     netdev@...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 05/17] staging: wfx: fix CAB sent at the wrong time

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

wfx_suspend_resume_mc() is called when the device is about to sent a
DTIM. This is the right moment to enqueue Content After DTIM Beacon
(CAB).

However, wfx_suspend_resume_mc() is also called when the DTIM period
ends. Until now, this event did also trig CAB.

Note this issue did not have too much impact since when a CAB is sent
outside of DTIM window, an error is reported by the firmware and
mac80211 retries to send the data.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/sta.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index 77d5ff17a59a..5132c19e0367 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -641,6 +641,8 @@ int wfx_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta, bool set)
 
 void wfx_suspend_resume_mc(struct wfx_vif *wvif, enum sta_notify_cmd notify_cmd)
 {
+	if (notify_cmd != STA_NOTIFY_AWAKE)
+		return;
 	WARN(!wfx_tx_queues_has_cab(wvif), "incorrect sequence");
 	WARN(wvif->after_dtim_tx_allowed, "incorrect sequence");
 	wvif->after_dtim_tx_allowed = true;
-- 
2.26.1