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This patch actually does quite a few things. When looking to add controller reset support, the organization modeled after rdma was very fragmented. rdma duplicates the reset and teardown paths and does different things to the block layer on the two paths. The code to build up the controller is also duplicated between the initial creation and the reset/error recovery paths. So I decided to make this sane. I reorganized the controller creation and teardown so that there is a connect path and a disconnect path. Initial creation obviously uses the connect path. Controller teardown will use the disconnect path, followed last access code. Controller reset will use the disconnect path to stop operation, and then the connect path to re-establish the controller. Along the way, several things were fixed - aens were not properly set up. They are allocated differently from the per-request structure on the blk queues. - aens were oddly torn down. the prior patch corrected to abort, but we still need to dma unmap and free relative elements. - missed a few ref counting points: in aen completion and on i/o's that fail - controller initial create failure paths were still confused vs teardown before converting to ref counting vs after we convert to refcounting. 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.