nvmet: use Retain Async Event bit to clear AEN
In the current implementation, we clear the AEN bit when we get the "get log page" command if given log page is associated with AEN. This patch allows optionally retaining the AEN for the ctrl under consideration when Retain Asynchronous Event (RAE) bit is set as a part of "get log page" command. This allows the host to read the Log page and optionally retaining the AEN associated with this log page when using userspace tools like nvme-cli. Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> [hch: also use the new helper in the just merged ANA code] Signed-off-by: Christoph Hellwig <hch@lst.de>
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