blk-iolatency: error out if blk_get_queue() failed in iolatency_set_limit()
[ Upstream commit 8d75d0ef ] If queue is dying while iolatency_set_limit() is in progress, blk_get_queue() won't increment the refcount of the queue. However, blk_put_queue() will still decrement the refcount later, which will cause the refcout to be unbalanced. Thus error out in such case to fix the problem. Fixes: 8c772a9b ("blk-iolatency: fix IO hang due to negative inflight counter") Signed-off-by:Yu Kuai <yukuai3@huawei.com> Acked-by:
Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20210805124645.543797-1-yukuai3@huawei.com Signed-off-by:
Jens Axboe <axboe@kernel.dk> Signed-off-by:
Sasha Levin <sashal@kernel.org>
parent
ed169b05
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