commit bcf28a2f284643060cdee550290ca2c2a559aa8e
author Xinming Hu <huxm@marvell.com> Fri Nov 18 19:30:30 2016 +0530
committer Kalle Valo <kvalo@codeaurora.org> Sat Nov 19 09:18:50 2016 +0200
tree 51fe5fb23dfddafae0eb5eb3912a3a3bc4c61d96
parent b42dbb27e3260badaf540351889a1ebd6797575b

mwifiex: reset card->adapter during device unregister

card->adapter gets initialized in mwifiex_register_dev(). As it's not
cleared in mwifiex_unregister_dev(), we may end up accessing the memory
which is already free in below scenario.

Scenario: Driver initialization is failed due to incorrect firmware or
some other reason. Meanwhile device reboot/unload occurs.

This is safe, now that we've properly synchronized suspend() and
remove() with the FW initialization thread; now that code can simply
check for 'card->adapter == NULL' and exit safely.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Tested-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>