tree 121cf9034f9e5b081c36aa6135bbcee7d6614555
parent d030671f3f261e528dc6e396a13f10859a74ae7c
author NeilBrown <neilb@suse.de> 1411344383 +1000
committer NeilBrown <neilb@suse.de> 1411345083 +1000

md/raid1: intialise start_next_window for READ case to avoid hang

r1_bio->start_next_window is not initialised in the READ
case, so allow_barrier may incorrectly decrement
   conf->current_window_requests
which can cause raise_barrier() to block forever.

Fixes: 79ef3a8aa1cb1523cc231c9a90a278333c21f761
cc: stable@vger.kernel.org (v3.13+)
Reported-by: Brassow Jonathan <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>