drm/xe: Fix unbind of unaccessed VMA (fault mode)

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In fault mode, page table binding is deferred until fault handler.
Thus vma->tile_present will be unset unless the VMA is accessed by GPU.

During a later unbind, the logic doesn't account for the fact that local
fence variable will be NULL in this case, leading to pass NULL into
dma_fence_add_callback() and causing few WARN_ONs to print to console.
The fix is already present in the code, just hoist the fence variable
computation to be done earlier.

Resolves warnings seen with igt@xe_exec_fault_mode@once-invalid-fault

Signed-off-by: Brian Welty <brian.welty@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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Brian Welty 2023-11-02 16:04:53 -07:00 • committed by Rodrigo Vivi

parent 6ffef7b699

commit 04dfef5b41

1 changed files with 4 additions and 4 deletions

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drivers/gpu/drm/xe/xe_vm.c

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