drm/amdkfd: Fix a race condition of vram buffer unref in svm code

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prange->svm_bo unref can happen in both mmu callback and a callback after
migrate to system ram. Both are async call in different tasks. Sync svm_bo
unref operation to avoid random "use-after-free".

Signed-off-by: Xiaogang Chen <xiaogang.chen@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Jesse Zhang <Jesse.Zhang@amd.com>
Tested-by: Jesse Zhang <Jesse.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Xiaogang Chen 2023-09-27 11:20:28 -05:00 • committed by Alex Deucher

parent 003048ddf4

commit 709c348261

1 changed files with 9 additions and 2 deletions

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drivers/gpu/drm/amd/amdkfd/kfd_svm.c

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