nvme-fabrics: Allow 0 as KATO value
Currently, driver code allows user to set 0 as KATO (Keep Alive TimeOut), but this is not being respected. This patch enforces the expected behavior. Signed-off-by: NGuilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> Reviewed-by: NSagi Grimberg <sagi@grimberg.me> Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@kernel.dk>
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