[PATCH 4.9 45/87] wcn36xx: Dont use the destroyed hal_mutex

[Greg Kroah-Hartman]

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bjorn Andersson <bjorn.anders...@linaro.org>


[ Upstream commit d53628882255481b710641dd0118fbd80af6e983 ]

ieee80211_unregister_hw() might invoke operations to stop the interface,
that uses the hal_mutex. So don't destroy it until after we're done
using it.

Signed-off-by: Bjorn Andersson <bjorn.anders...@linaro.org>
Signed-off-by: Kalle Valo <kv...@qca.qualcomm.com>
Signed-off-by: Sasha Levin <alexander.le...@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/wireless/ath/wcn36xx/main.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/wireless/ath/wcn36xx/main.c
+++ b/drivers/net/wireless/ath/wcn36xx/main.c
@@ -1165,11 +1165,12 @@ static int wcn36xx_remove(struct platfor
        wcn36xx_dbg(WCN36XX_DBG_MAC, "platform remove\n");
 
        release_firmware(wcn->nv);
-       mutex_destroy(&wcn->hal_mutex);
 
        ieee80211_unregister_hw(hw);
        iounmap(wcn->dxe_base);
        iounmap(wcn->ccu_base);
+
+       mutex_destroy(&wcn->hal_mutex);
        ieee80211_free_hw(hw);
 
        return 0;