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All of the members of mlx5_cache_ent must be accessed while holding the spinlock, add the missing spinlock in the __cache_work_func(). Using cache->stopped and flush_workqueue() is an inherently racy way to shutdown self-scheduling work on a queue. Replace it with ent->disabled under lock, and always check disabled before queuing any new work. Use cancel_work_sync() to shutdown the queue. Use READ_ONCE/WRITE_ONCE for dev->last_add to manage concurrency as coherency is less important here. Split fill_delay from the bitfield. C bitfield updates are not atomic and this is just a mess. Use READ_ONCE/WRITE_ONCE, but this could also use test_bit()/set_bit(). Link: https://lore.kernel.org/r/20200310082238.239865-11-leon@kernel.org Signed-off-by: Leon Romanovsky <leonro@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
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.