[Bug 111295] [CI][SHARDS] igt at perf_pmu@* - dmesg-warn - WARNING: inconsistent lock state

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111295

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |FIXED

--- Comment #14 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 6dcb85a0ad990455ae7c596e3fc966ad9c1ba9c5
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Fri Aug 23 14:26:46 2019 +0100

    drm/i915: Hold irq-off for the entire fake lock period

    Sadly lockdep records when the irqs are re-enabled and then marks up the
    fake lock as being irq-unsafe. Our hand is forced and so we must mark up
    the entire fake lock critical section as irq-off.

    Hopefully this is the last tweak required!

    v2: Not quite, we need to mark the timeline spinlock as irqsafe. That
    was a genuine bug being hidden by the earlier lockdep splat.

    Fixes: d67739268cf0 ("drm/i915/gt: Mark up the nested engine-pm timeline
lock as irqsafe")
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
    Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Reviewed-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>
    Link:
https://patchwork.freedesktop.org/patch/msgid/20190823132700.25286-2-chris@chris-wilson.co.uk

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