netdev - [PATCH 19/19] staging: wfx: remove false positive warning

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Message-Id: <20200515083325.378539-20-Jerome.Pouiller@silabs.com>
Date:   Fri, 15 May 2020 10:33:25 +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 19/19] staging: wfx: remove false positive warning

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

When a station is removed, the driver check that all the Tx frames were
correctly sent. However, the station can be removed before all the Tx
frames were acknowledged and a false positive warning can be emitted.

The previous commit has added a trace when driver received an
acknowledge for a non-existent station. It appear that these events
are perfectly correlated and there is no leak.

Now, the subject is perfectly understood. Remove the warning. Just keep
a debug trace in case we have any doubt in the future.

In the past, the subject has already been discussed here:
   https://lore.kernel.org/driverdev-devel/6287924.ghGFUMk3OD@pc-42/

Fixes: 4bbc6a3e7ad0 ("staging: wfx: make warning about pending frame less scary")
Signed-off-by: Jérôme Pouiller <jerome.pouiller@...abs.com>
---
 drivers/staging/wfx/sta.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/wfx/sta.c b/drivers/staging/wfx/sta.c
index f448957c1a92..6015cd2c4d8a 100644
--- a/drivers/staging/wfx/sta.c
+++ b/drivers/staging/wfx/sta.c
@@ -441,8 +441,10 @@ int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 
 	for (i = 0; i < ARRAY_SIZE(sta_priv->buffered); i++)
 		if (sta_priv->buffered[i])
-			dev_warn(wvif->wdev->dev, "release station while %d pending frame on queue %d",
-				 sta_priv->buffered[i], i);
+			// Not an error if paired with trace in
+			// wfx_tx_update_sta()
+			dev_dbg(wvif->wdev->dev, "release station while %d pending frame on queue %d",
+				sta_priv->buffered[i], i);
 	// See note in wfx_sta_add()
 	if (!sta_priv->link_id)
 		return 0;
-- 
2.26.2