if hmm_range_get_pages returns EBUSY error during svm_range_validate_and_map, within the context of a page fault interrupt. This should retry through svm_range_restore_pages callback. Therefore we treat this as EAGAIN error instead, and defer it to restore pages fallback.
Signed-off-by: Alex Sierra <[email protected]> --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 93609ea42163..3ebd5d99f39e 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -1685,6 +1685,8 @@ static int svm_range_validate_and_map(struct mm_struct *mm, WRITE_ONCE(p->svms.faulting_task, NULL); if (r) { pr_debug("failed %d to get svm range pages\n", r); + if (r == -EBUSY) + r = -EAGAIN; goto unreserve_out; } -- 2.32.0
