commit 3234f5b0 upstream.

Fixes: a53268be ('rtlwifi: rtl8192cu: Fix too long disable of IRQs')
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>