fm10k: comment next_vf_mbx flow
Add a header comment explaining why we have the somewhat crazy mailbox flow. This flow is necessary as it prevents the PF<->SM mailbox from being flooded by the VF messages, which normally trigger a message to the PF. This helps prevent the case where we see a PF mailbox timeout. Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: NJacob Keller <jacob.e.keller@intel.com> Acked-by: NMatthew Vick <matthew.vick@intel.com> Tested-by: NKrishneil Singh <krishneil.k.singh@intel.com> Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
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