[Bug 104209] [CI] igt at gem_userptr_blits@map-fixed-invalidate-gup - dmesg-warn: WARNING: possible circular locking dependency detected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104209

--- Comment #4 from Daniel Vetter <daniel at ffwll.ch> ---
Ok, I read the code some more, and the cancel_userptr work_struct trick used to
hide the real locking dependencies i915_gem_userptr_mn_invalidate_range_start()
from lockdep simply doesn't work anymore with the cross-release stuff. The

queue_work(wq, work);

...

flush_workqueue(wq);

is a dead giveaway that we have the full locking dependencies of whatever runs
in work. I'd say lockdep is correct here.

(I still don't know how to fix this)

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