[Bug 1346] net/i40e does not report interrupt for the second packet

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=1346

            Bug ID: 1346
           Summary: net/i40e does not report interrupt for the second
                    packet
           Product: DPDK
           Version: 23.11
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: andrew.rybchenko at oktetlabs.ru
  Target Milestone: ---

net/i40e does not report interrupt for the second packet

If I understand Rx interrupts functionality correctly, Rx interrupts should be
generated until disabled. However, it does not happen in the case of i40e with
X710 NIC.

The problem is found by open-source test suite which has been run at UNH IOL
[1].

Scenario is simple:
 - enable Rx interrupts
 - send packet from peer
 - check interrupt, receive packet
 - send one more packet
 - check interrupt - failure, no interupt

[1]
https://ts-factory.io/bublik/v2/log/362398?mode=treeAndlog&focusId=363533&experimental=true&lineNumber=1_69

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