[Bug 290625] mpt(4) got into an infinite loop of recovery

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From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 28 Oct 2025 08:06:47 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=290625

            Bug ID: 290625
           Summary: mpt(4) got into an infinite loop of recovery
           Product: Base System
           Version: 14.3-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: phk@FreeBSD.org

While testing a tape-drive which showed itself to have a defect SCSI interface,
the mpt(4) device driver got into an infite loop of recovery-attempts:

        +mpt0: attempting to abort req 0xfffffe01b44b52b0:1732 function 0
        +mpt0: abort of req 0xfffffe01b44b52b0:1732 completed
        +mpt0: attempting to abort req 0xfffffe01b44b52b0:1732 function 0
        +mpt0: abort of req 0xfffffe01b44b52b0:1732 completed
        +mpt0: attempting to abort req 0xfffffe01b44b52b0:1732 function 0
        +mpt0: abort of req 0xfffffe01b44b52b0:1732 completed
        +mpt0: attempting to abort req 0xfffffe01b44b52b0:1732 function 0
        +mpt0: abort of req 0xfffffe01b44b52b0:1732 completed
        +mpt0: attempting to abort req 0xfffffe01b44b52b0:1732 function 0
        +mpt0: abort of req 0xfffffe01b44b52b0:1732 completed
        +mpt0: attempting to abort req 0xfffffe01b44b52b0:1732 function 0
        +mpt0: abort of req 0xfffffe01b44b52b0:1732 completed
        +mpt0: attempting to abort req 0xfffffe01b44b52b0:1732 function 0

This continued until I attached a functioning SCSI device to the bus.

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