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drm/tegra: Fix iommu_map_sgtable() return value check

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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.

Update tegra_bo_iommu_map() to correctly check for errors from
iommu_map_sgtable.

Fixes: ad8f36e4b6 ("iommu: return full error code from iommu_map_sg[_atomic]()")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patch.msgid.link/20260421-iommu_map_sgtable-return-v1-2-fb484c07d2a1@nvidia.com
This commit is contained in:
Mikko Perttunen 2026-04-21 13:02:37 +09:00 committed by Thierry Reding
parent 18f7476201
commit b3f349517d
1 changed files with 6 additions and 3 deletions
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9
drivers/gpu/drm/tegra/gem.c
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@ -234,6 +234,7 @@ static const struct host1x_bo_ops tegra_bo_ops = {
static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo)
{
int prot = IOMMU_READ | IOMMU_WRITE;
ssize_t size;
int err;
if (bo->mm)
@ -255,13 +256,15 @@ static int tegra_bo_iommu_map(struct tegra_drm *tegra, struct tegra_bo *bo)
bo->iova = bo->mm->start;
bo->size = iommu_map_sgtable(tegra->domain, bo->iova, bo->sgt, prot);
if (!bo->size) {
size = iommu_map_sgtable(tegra->domain, bo->iova, bo->sgt, prot);
if (size < 0) {
dev_err(tegra->drm->dev, "failed to map buffer\n");
err = -ENOMEM;
err = size;
goto remove;
}
bo->size = size;
mutex_unlock(&tegra->mm_lock);
return 0;