Israel Rukshin b837b28394 nvme: fix subsystem multiple controllers support check ... There is a problem when another module (e.g. nvmet) takes a reference on the nvme block device and the physical nvme drive is removed. In that case nvme_free_ctrl() will not be called and the controller state will be "deleting" or "dead" unless nvmet module releases the block device. Later on, the same nvme drive probes back and nvme_init_subsystem() will be called and fail due to duplicate subnqn (if the nvme device doesn't support subsystem with multiple controllers). This will cause a probe failure. This commit changes the check of multiple controllers support at nvme_init_subsystem() by not counting all the controllers at "dead" or "deleting" state (this is safe because controllers at this state will never be active again). Fixes: ab9e00cc72 ("nvme: track subsystems") Reviewed-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Israel Rukshin <israelr@mellanox.com> Signed-off-by: Christoph Hellwig <hch@lst.de>		2018-01-08 16:57:00 +01:00
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host	nvme: fix subsystem multiple controllers support check	2018-01-08 16:57:00 +01:00
target	nvmet: rearrange nvmet_ctrl_free()	2018-01-08 11:01:59 +01:00
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