[Bug 888] cannot close memif port

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=888

            Bug ID: 888
           Summary: cannot close memif port
           Product: DPDK
           Version: 21.11
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: sunnylandh at gmail.com
  Target Milestone: ---

Created attachment 179
  --> https://bugs.dpdk.org/attachment.cgi?id=179&action=edit
code to reproduce bug

I'm trying out DPDK 21.11-rc3 and noticed a regression.

If a port using net_memif driver has been started, it is not possible to close
the port.
This is because the rte_eth_dev_close function has a check that the port must
be stopped, but net_memif driver does not support dev_ops->dev_stop operation.
Consequently, it becomes impossible to stop and close the memif port.

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