nvme-pci: cleanup SQ allocation a bit
Use a bit flag to mark if the SQ was allocated from the CMB, and clean up the surrounding code a bit. Reviewed-by: NSagi Grimberg <sagi@grimberg.me> Reviewed-by: NKeith Busch <keith.busch@intel.com> Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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