drm/xe/vf: Avoid indefinite blocking in preempt rebind worker for VFs supporting migration

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Blocking in work queues on a hardware action that may never occur —
especially when it depends on a software fixup also scheduled on the
a work queue — is a recipe for deadlock. This situation arises with
the preempt rebind worker and VF post-migration recovery. To prevent
potential deadlocks, avoid indefinite blocking in the preempt rebind
worker for VFs that support migration.

v4:
 - Use dma_fence_wait_timeout (CI)

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Tomasz Lis <tomasz.lis@intel.com>
Link: https://lore.kernel.org/r/20251008214532.3442967-19-matthew.brost@intel.com

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Matthew Brost 2025-10-08 14:45:16 -07:00

parent a4dae94aad

commit 1faeeea056

1 changed files with 25 additions and 1 deletions

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drivers/gpu/drm/xe/xe_vm.c

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