[Bug 108676] [CI][BAT] igt at pm_rpm@module-reload - dmesg-warn - WARNING: possible circular locking dependency detected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108676

--- Comment #2 from Chris Wilson <chris at chris-wilson.co.uk> ---
Caused by

commit 9dbbedaa6171247c4c7c40b83f05b200a117c2e0
Author: Sai Praneeth <sai.praneeth.prakhya at intel.com>
Date:   Tue Sep 11 12:15:21 2018 -0700

    efi: Make efi_rts_work accessible to efi page fault handler

    After the kernel has booted, if any accesses by firmware causes a page
    fault, the efi page fault handler would freeze efi_rts_wq and schedules
    a new process. To do this, the efi page fault handler needs
    efi_rts_work. Hence, make it accessible.

    There will be no race conditions in accessing this structure, because
    all the calls to efi runtime services are already serialized.

    Tested-by: Bhupesh Sharma <bhsharma at redhat.com>
    Suggested-by: Matt Fleming <matt at codeblueprint.co.uk>
    Based-on-code-from: Ricardo Neri <ricardo.neri at intel.com>
    Signed-off-by: Sai Praneeth Prakhya <sai.praneeth.prakhya at intel.com>
    Signed-off-by: Ard Biesheuvel <ard.biesheuvel at linaro.org>

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