[Bug 1089] mlx5 Windows crash creating flows in multiple threads

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=1089

            Bug ID: 1089
           Summary: mlx5 Windows crash creating flows in multiple threads
           Product: DPDK
           Version: 21.11
          Hardware: All
                OS: Windows
            Status: UNCONFIRMED
          Severity: critical
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: paul203948 at gmail.com
  Target Milestone: ---

Hi,

I am using release 21.11 on Windows with a ConnectX-4 card. My application is
crashing when calling rte_flow_create in two threads at the same time.

I tracked the issue down to mlx5_is_thread_alive() in
drivers/net/mlx5/windows/mlx5_flow_os.c. This is always returning false.
Changing the second return statement to return true fixes the crash.

I think one thread was destroying data structures still in use by another
thread.

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