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path: root/drivers/iommu/arm-smmu-v3.c
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Diffstat (limited to 'drivers/iommu/arm-smmu-v3.c')
-rw-r--r--drivers/iommu/arm-smmu-v3.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index f122071688fd..744592d330ca 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -1698,13 +1698,15 @@ static int arm_smmu_domain_finalise(struct iommu_domain *domain)
domain->pgsize_bitmap = pgtbl_cfg.pgsize_bitmap;
domain->geometry.aperture_end = (1UL << ias) - 1;
domain->geometry.force_aperture = true;
- smmu_domain->pgtbl_ops = pgtbl_ops;
ret = finalise_stage_fn(smmu_domain, &pgtbl_cfg);
- if (ret < 0)
+ if (ret < 0) {
free_io_pgtable_ops(pgtbl_ops);
+ return ret;
+ }
- return ret;
+ smmu_domain->pgtbl_ops = pgtbl_ops;
+ return 0;
}
static __le64 *arm_smmu_get_step_for_sid(struct arm_smmu_device *smmu, u32 sid)
@@ -1731,7 +1733,7 @@ static __le64 *arm_smmu_get_step_for_sid(struct arm_smmu_device *smmu, u32 sid)
static void arm_smmu_install_ste_for_dev(struct iommu_fwspec *fwspec)
{
- int i;
+ int i, j;
struct arm_smmu_master_data *master = fwspec->iommu_priv;
struct arm_smmu_device *smmu = master->smmu;
@@ -1739,6 +1741,13 @@ static void arm_smmu_install_ste_for_dev(struct iommu_fwspec *fwspec)
u32 sid = fwspec->ids[i];
__le64 *step = arm_smmu_get_step_for_sid(smmu, sid);
+ /* Bridged PCI devices may end up with duplicated IDs */
+ for (j = 0; j < i; j++)
+ if (fwspec->ids[j] == sid)
+ break;
+ if (j < i)
+ continue;
+
arm_smmu_write_strtab_ent(smmu, sid, step, &master->ste);
}
}