staging: wfx: fix warning about freeing in-use mutex during device unregister

[ Upstream commit bab0a0b03442a62fe3abefcb2169e0b9ff95990c ]

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 <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200310101356.182818-2-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/staging/wfx/hif_tx.c b/drivers/staging/wfx/hif_tx.c
index cb7cddcb9815939943eebab14354b7ff5f632b3d..16e7d190430f3e35e363bf1a55cc5583152f0499 100644 (file)
--- a/drivers/staging/wfx/hif_tx.c
+++ b/drivers/staging/wfx/hif_tx.c
@@ -141,6 +141,7 @@ int hif_shutdown(struct wfx_dev *wdev)
        else
                control_reg_write(wdev, 0);
        mutex_unlock(&wdev->hif_cmd.lock);
+       mutex_unlock(&wdev->hif_cmd.key_renew_lock);
        kfree(hif);
        return ret;
 }