[Bug 240917] panic: (scsi_da.c:2128, 12.1-BETA1) _mtx_lock_sleep: recursed on non-recursive mutex CAM device lock

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 04 Jan 2022 02:02:34 UTC

--- Comment #6 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:


commit bb8441184bab60cd8a07c2b94bd6c4ae8b56ec25
Author:     Robert Wing <rew@FreeBSD.org>
AuthorDate: 2022-01-04 01:21:58 +0000
Commit:     Robert Wing <rew@FreeBSD.org>
CommitDate: 2022-01-04 01:56:48 +0000

    cam: don't lock while handling an AC_UNIT_ATTENTION

    Don't take the device_mtx lock in daasync() when handling an
    AC_UNIT_ATTENTION. Instead, assert the lock is held before modifying the
    periph's softc flags.

    The device_mtx lock is taken in xptdevicetraverse() before daasync()
    is eventually called in xpt_async_bcast().

    PR:             240917, 226510, 226578
    Reviewed by:    imp
    MFC after:      3 weeks
    Differential Revision: https://reviews.freebsd.org/D27735

 sys/cam/scsi/scsi_da.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

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