tree 3fc3b0f7160c9f9659eed18721b6770468def367
parent fe47f1250805438fa06580c9ce6d37bc4bc595d2
author Dmitry Tarnyagin <dmitry.tarnyagin@stericsson.com> 1318505364 +0000
committer David S. Miller <davem@davemloft.net> 1319009141 -0400

caif-hsi: Fix for wakeup condition problem

Under stressed conditions a race could happen when del_timer_sync() was called
from softirq context at the same time when mod_timer_pending() for the same
timer was called from the workqueue. This leaded to a state mismatch in the
CAIF HSI driver and following unexpected link wakeup procedure.

The fix puts del_timer_sync() and mod_timer_pending() calls under a spin lock
to protect against the race condition.

Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>