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drm/amdgpu: null check for hmm_pfns ptr before freeing it

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Due to low memory or when num of pages is too big to be
accomodated, allocation could fail for pfn's.

Chekc hmm_pfns for NULL before calling the kvfree for the it.

Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Acked-by: Arunpravin Paneer Selvam <Arunpravin.PaneerSelvam@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sunil Khatri
2025-10-21 15:14:06 +05:30
committed by Alex Deucher
parent 6f1ee58a5e
commit 84564d2920
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c
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@@ -286,7 +286,9 @@ void amdgpu_hmm_range_free(struct amdgpu_hmm_range *range)
if (!range) if (!range)
return; return;
kvfree(range->hmm_range.hmm_pfns); if (range->hmm_range.hmm_pfns)
kvfree(range->hmm_range.hmm_pfns);
amdgpu_bo_unref(&range->bo); amdgpu_bo_unref(&range->bo);
kfree(range); kfree(range);
} }