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由 Robert Konklewski 提交于
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: NRobert Konklewski <robertx.konklewski@intel.com> Tested-by: NAndrew Bowers <andrewx.bowers@intel.com> Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
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