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Date:   Tue, 10 Mar 2020 11:13:52 +0100
From:   Jerome Pouiller <>
        Greg Kroah-Hartman <>,
        Kalle Valo <>,
        "David S . Miller" <>,
        Jérôme Pouiller 
Subject: [PATCH 1/5] staging: wfx: fix warning about freeing in-use mutex during device unregister

From: Jérôme Pouiller <>

After hif_shutdown(), communication with the chip is no more possible.
It the only request that never reply. Therefore, hif_cmd.lock is never
unlocked. hif_shutdown() unlock itself hif_cmd.lock to avoid a potential
warning during disposal of device. hif_cmd.key_renew_lock should also
been unlocked for the same reason.

Signed-off-by: Jérôme Pouiller <>
 drivers/staging/wfx/hif_tx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index 2428363371fa..7b732c531a74 100644
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -140,6 +140,7 @@ int hif_shutdown(struct wfx_dev *wdev)
 		control_reg_write(wdev, 0);
+	mutex_unlock(&wdev->hif_cmd.key_renew_lock);
 	return ret;

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