James Smart 6cdefc6e2a nvme: if_ready checks to fail io to deleting controller ... The revised if_ready checks skipped over the case of returning error when the controller is being deleted. Instead it was returning BUSY, which caused the ios to retry, which caused the ns delete to hang waiting for the ios to drain. Stack trace of hang looks like: kworker/u64:2 D 0 74 2 0x80000000 Workqueue: nvme-delete-wq nvme_delete_ctrl_work [nvme_core] Call Trace: ? __schedule+0x26d/0x820 schedule+0x32/0x80 blk_mq_freeze_queue_wait+0x36/0x80 ? remove_wait_queue+0x60/0x60 blk_cleanup_queue+0x72/0x160 nvme_ns_remove+0x106/0x140 [nvme_core] nvme_remove_namespaces+0x7e/0xa0 [nvme_core] nvme_delete_ctrl_work+0x4d/0x80 [nvme_core] process_one_work+0x160/0x350 worker_thread+0x1c3/0x3d0 kthread+0xf5/0x130 ? process_one_work+0x350/0x350 ? kthread_bind+0x10/0x10 ret_from_fork+0x1f/0x30 Extend nvmf_fail_nonready_command() to supply the controller pointer so that the controller state can be looked at. Fail any io to a controller that is deleting. Fixes: 3bc32bb118 ("nvme-fabrics: refactor queue ready check") Fixes: 35897b920c ("nvme-fabrics: fix and refine state checks in __nvmf_check_ready") Signed-off-by: James Smart <james.smart@broadcom.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Ewan D. Milne <emilne@redhat.com> Reviewed-by: Ewan D. Milne <emilne@redhat.com>		2018-07-24 13:44:40 +02:00
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host	nvme: if_ready checks to fail io to deleting controller	2018-07-24 13:44:40 +02:00
target	nvme: if_ready checks to fail io to deleting controller	2018-07-24 13:44:40 +02:00
Kconfig	nvme: use menu Kconfig interface	2017-10-04 09:43:57 +02:00
Makefile	nvmet: add a generic NVMe target	2016-07-05 11:30:33 -06:00