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drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN

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Commit "iommu: return full error code from iommu_map_sg[_atomic]()"
changed iommu_map_sgtable() to return an ssize_t and negative values
in error cases, rather than a size_t and a zero.

Store the return value in the appropriate type and in case of error,
return it rather than WARNing.

Fixes: ad8f36e4b6 ("iommu: return full error code from iommu_map_sg[_atomic]()")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Patchwork: https://patchwork.freedesktop.org/patch/719685/
Message-ID: <20260421-iommu_map_sgtable-return-v1-3-fb484c07d2a1@nvidia.com>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
This commit is contained in:
Mikko Perttunen 2026-04-21 13:02:38 +09:00 committed by Rob Clark
parent 78d79c614a
commit 55e0f0d1c1
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/msm/msm_iommu.c
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@ -677,7 +677,7 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova,
int prot)
{
struct msm_iommu *iommu = to_msm_iommu(mmu);
size_t ret;
ssize_t ret;
WARN_ON(off != 0);
@ -686,7 +686,8 @@ static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova,
iova |= GENMASK_ULL(63, 49);
ret = iommu_map_sgtable(iommu->domain, iova, sgt, prot);
WARN_ON(!ret);
if (ret < 0)
return ret;
return (ret == len) ? 0 : -EINVAL;
}