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The 'remove_work' may be scheduled to run after nvme_remove() returns since we can't simply cancel it in nvme_remove() for avoiding deadlock. Once nvme_remove() returns, this module(nvme) can be unloaded. On the other hand, nvme_put_ctrl() calls ctr->ops->free_ctrl which may point to nvme_pci_free_ctrl() in unloaded module. This patch avoids this issue by queuing 'remove_work' via 'nvme_wq', and flush this worqueue in nvme_exit() as suggested by Sagi. Suggested-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.