mwifiex: do not wait on semaphore during card removal
authorXinming Hu <huxm@marvell.com>
Mon, 11 Apr 2016 14:52:40 +0000 (07:52 -0700)
committerKalle Valo <kvalo@codeaurora.org>
Thu, 14 Apr 2016 13:01:46 +0000 (16:01 +0300)
commitc3ec0ff6425b86655aa34b5c6cb0f7b6d559c6b2
treee1b59c86373bd1218a2915a5ebabe508b2c1e708
parentb9db397879333c272f2bc888cd713773e7d2604f
mwifiex: do not wait on semaphore during card removal

Host hang is observed if card is removed before firmware download
gets completed. In this case, firmware will be failed to download and
adapter structure gets freed.

In other thread, mwifiex_remove_card() waits on semaphore until the
firmware download fails. This wait is not necessary and may result in
invalid adapter access.

This patch uses down_trylock to return immediately so that hang issue
won't occur.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
drivers/net/wireless/marvell/mwifiex/main.c