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When connectivity is lost to a device, the association is terminated and the blk-mq queues are quiesced/stopped. When connectivity is re-established, they are resumed. If connectivity is lost for a sufficient amount of time that the controller is then deleted, the delete path starts tearing down queues, and eventually calling nvme_ns_remove(). It appears that pending commands may cause blk_cleanup_queue() to never complete and the teardown stalls. Correct by starting the ns queues after transitioning to a DELETING state, allowing pending commands to be flushed with io failures. Thus the delete path is clear when reached. Signed-off-by: James Smart <james.smart@broadcom.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.