[Bug 275693] bnxt: kernel crash during driver unload

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275693

            Bug ID: 275693
           Summary: bnxt: kernel crash during driver unload
           Product: Base System
           Version: 12.4-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: sumit.saxena@broadcom.com

Created attachment 246976
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=246976&action=edit
bnxt: kernel crash during driver unload

I am observing kernel crash intermittently(occurring once in 4-5 attempts)
during driver unload after running some IPv4 traffic. The crash is seen in
iflib layer.

   iflib_tqg_detach+0xc2
   iflib_device_deregister+0x1ec


I don't have the crash logs in text format. So attaching the screenshot.
IFLIB experts can help to know what's going wrong here.

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