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Edward Cree says: ==================== sfc: rework locking around filter management The use of a spinlock to protect filter state combined with the need for a sleeping operation (MCDI) to apply that state to the NIC (on EF10) led to unfixable race conditions, around the handling of filter restoration after an MC reboot. So, this patch series removes the requirement to be able to modify the SW filter table from atomic context, by using a workqueue to request asynchronous filter operations (which are needed for ARFS). Then, the filter table locks are changed to mutexes, replacing the dance of spinlocks and 'busy' flags. Also, a mutex is added to protect the RSS context state, since otherwise a similar race is possible around restoring that after an MC reboot. While we're at it, fix a couple of other related bugs. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
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.