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drm/amdkfd: Skip handle mapping SVM range with no GPU access

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If the SVM range has no GPU access nor access-in-place attribute,
validate and map to GPU should skip the range.

Add NULL pointer check if find_first_bit(ctx->bitmap, MAX_GPU_INSTANCE)
returns MAX_GPU_INSTANCE as gpuidx if ctx->bitmap is empty.

Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Alex Sierra <alex.sierra@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Philip Yang 2023-06-29 18:01:21 -04:00 committed by Alex Deucher
parent c4cde7358d
commit 8c45b31909
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/amd/amdkfd/kfd_svm.c
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@ -1522,6 +1522,8 @@ static void *kfd_svm_page_owner(struct kfd_process *p, int32_t gpuidx)
struct kfd_process_device *pdd;
pdd = kfd_process_device_from_gpuidx(p, gpuidx);
if (!pdd)
return NULL;
return SVM_ADEV_PGMAP_OWNER(pdd->dev->adev);
}
@ -1596,12 +1598,12 @@ static int svm_range_validate_and_map(struct mm_struct *mm,
}
if (bitmap_empty(ctx->bitmap, MAX_GPU_INSTANCE)) {
if (!prange->mapped_to_gpu) {
bitmap_copy(ctx->bitmap, prange->bitmap_access, MAX_GPU_INSTANCE);
if (!prange->mapped_to_gpu ||
bitmap_empty(ctx->bitmap, MAX_GPU_INSTANCE)) {
r = 0;
goto free_ctx;
}
bitmap_copy(ctx->bitmap, prange->bitmap_access, MAX_GPU_INSTANCE);
}
if (prange->actual_loc && !prange->ttm_res) {