block: fix issue with calling blk_stop_queue() from the request_fn handler
block: fix issue with calling blk_stop_queue() from the request_fn handler

When the queue work handler was converted to delayed work, the
stopping was inadvertently made sync as well. Change this back
to being async stop, using __cancel_delayed_work() instead of
cancel_delayed_work().

Reported-by: Jeremy Fitzhardinge <b3f594e10a9edcf5413cf1190121d45078c62290@goop.org>
Reported-by: Chris Mason <a169954b4cb1a46cee25f659d3bddfebe02b5fba@oracle.com>
Signed-off-by: Jens Axboe <08e836a620179c237f631ad0545a7ebdf54201f3@fusionio.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs