This is a note to let you know that I've just added the patch titled

wcn36xx: Don't use the destroyed hal_mutex

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: wcn36xx-don-t-use-the-destroyed-hal_mutex.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Thu Nov 9 09:48:01 CET 2017

From: Bjorn Andersson bjorn.andersson@linaro.org Date: Wed, 11 Jan 2017 16:32:21 +0200 Subject: wcn36xx: Don't use the destroyed hal_mutex

From: Bjorn Andersson bjorn.andersson@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.andersson@linaro.org Signed-off-by: Kalle Valo kvalo@qca.qualcomm.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@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;

Patches currently in stable-queue which might be from bjorn.andersson@linaro.org are

queue-4.9/wcn36xx-don-t-use-the-destroyed-hal_mutex.patch