drm/i915: Move gt_revoke() slightly

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We get a lockdep splat when the reset mutex is held, because it can be
taken from fence_wait. This conflicts with the mmu notifier we have,
because we recurse between reset mutex and mmap lock -> mmu notifier.

Remove this recursion by calling revoke_mmaps before taking the lock.

The reset code still needs fixing, as taking mmap locks during reset
is not allowed.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
[danvet: Add FIXME.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210323155059.628690-64-maarten.lankhorst@linux.intel.com

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Maarten Lankhorst 2021-03-23 16:50:52 +01:00 • committed by Daniel Vetter

parent fd995a3cc4

commit 5b0a78ec0b

1 changed files with 7 additions and 2 deletions

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drivers/gpu/drm/i915/gt/intel_reset.c

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