NVMe: Skip async events for degraded controllers
If the controller is degraded, the driver should stay out of the way so the user can recover the drive. This patch skips driver initiated async event requests when the drive is in this state. Signed-off-by: NKeith Busch <keith.busch@intel.com> Reviewed-by: NSagi Grimberg <sagi@grimberg.me> Reviewed-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJens Axboe <axboe@fb.com>
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