On Thu, 21 May 2015, Parav Pandit wrote:
Avoid diabling interrupt and holding q_lock for the queue
which is just getting initialized.
With this change, online_queues is also incremented without
lock during queue setup stage.
if Power management nvme_suspend() kicks in during queue setup time,
per nvmeq based q_lock spinlock cannot protect device wide
online_queues variable anyway.
The q_lock is held to protect polling from reading inconsistent data.
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