ath9k: fix a minor rcu issue

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37013 3c298f89-4303-0410-b956-a3cf2f4a3e73
kernel: fix a reference counting bug in overlayfs

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@37014 3c298f89-4303-0410-b956-a3cf2f4a3e73