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A mirror of the official Linux kernel repository just in case
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First, this patch eliminates IOMMU DMAR Faults caused by VF hardware. This is done by enabling VF hardware only after VSI resources are freed. Otherwise, hardware could DMA into memory that is (or just has been) being freed. Then, the VF driver is activated only after VSI resources have been reallocated. That's because the VF driver can request resources immediately after it's activated. So they need to be ready at that point. The second race condition happens when the OS initiates a VF reset, and then before it's finished modifies VF's settings by changing its MAC, VLAN ID, bandwidth allocation, anti-spoof checking, etc. These functions needed to be blocked while VF is undergoing reset. Otherwise, they could operate on data structures that had just been freed or not yet fully initialized. Change-ID: I43ba5a7ae2c9a1cce3911611ffc4598ae33ae3ff Signed-off-by: Robert Konklewski <robertx.konklewski@intel.com> Tested-by: Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> |
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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.