nvmet: allow mn change if subsys not discovered
Currently, once the subsystem's model_number is set for the first time there is no way to change it. However, as long as no connection was established to nvmf target, there is no reason for such restriction and we should allow to change the subsystem's model_number as many times as needed. In addition, in order to simplfy the changes and make the model number flow more similar to the rest of the attributes in the Identify Controller data structure, we set a default value for the model number at the initiation of the subsystem. Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com> Signed-off-by: Noam Gottlieb <ngottlieb@nvidia.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
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