This converts all the feasible instances of dev->bus->iommu_ops to dev_iommu_ops() in order to make the operation of obtaining iommu_ops from a device consistent. The dev_iommu_ops() warns on NULL ops, so we don't need to keep the confusing ops check.
Suggested-by: Robin Murphy <robin.mur...@arm.com> Signed-off-by: Lu Baolu <baolu...@linux.intel.com> --- drivers/iommu/iommu.c | 30 ++++++++++++++---------------- 1 file changed, 14 insertions(+), 16 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 245e3d2fb74b..27276421d253 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -323,13 +323,14 @@ int iommu_probe_device(struct device *dev) void iommu_release_device(struct device *dev) { - const struct iommu_ops *ops = dev->bus->iommu_ops; + const struct iommu_ops *ops; if (!dev->iommu) return; iommu_device_unlink(dev->iommu->iommu_dev, dev); + ops = dev_iommu_ops(dev); ops->release_device(dev); iommu_group_remove_device(dev); @@ -1522,7 +1523,7 @@ EXPORT_SYMBOL_GPL(fsl_mc_device_group); static int iommu_get_def_domain_type(struct device *dev) { - const struct iommu_ops *ops = dev->bus->iommu_ops; + const struct iommu_ops *ops = dev_iommu_ops(dev); if (dev_is_pci(dev) && to_pci_dev(dev)->untrusted) return IOMMU_DOMAIN_DMA; @@ -1581,7 +1582,7 @@ static int iommu_alloc_default_domain(struct iommu_group *group, */ static struct iommu_group *iommu_group_get_for_dev(struct device *dev) { - const struct iommu_ops *ops = dev->bus->iommu_ops; + const struct iommu_ops *ops = dev_iommu_ops(dev); struct iommu_group *group; int ret; @@ -1589,9 +1590,6 @@ static struct iommu_group *iommu_group_get_for_dev(struct device *dev) if (group) return group; - if (!ops) - return ERR_PTR(-EINVAL); - group = ops->device_group(dev); if (WARN_ON_ONCE(group == NULL)) return ERR_PTR(-EINVAL); @@ -2578,17 +2576,17 @@ EXPORT_SYMBOL_GPL(iommu_set_pgtable_quirks); void iommu_get_resv_regions(struct device *dev, struct list_head *list) { - const struct iommu_ops *ops = dev->bus->iommu_ops; + const struct iommu_ops *ops = dev_iommu_ops(dev); - if (ops && ops->get_resv_regions) + if (ops->get_resv_regions) ops->get_resv_regions(dev, list); } void iommu_put_resv_regions(struct device *dev, struct list_head *list) { - const struct iommu_ops *ops = dev->bus->iommu_ops; + const struct iommu_ops *ops = dev_iommu_ops(dev); - if (ops && ops->put_resv_regions) + if (ops->put_resv_regions) ops->put_resv_regions(dev, list); } @@ -2793,9 +2791,9 @@ iommu_sva_bind_device(struct device *dev, struct mm_struct *mm, void *drvdata) { struct iommu_group *group; struct iommu_sva *handle = ERR_PTR(-EINVAL); - const struct iommu_ops *ops = dev->bus->iommu_ops; + const struct iommu_ops *ops = dev_iommu_ops(dev); - if (!ops || !ops->sva_bind) + if (!ops->sva_bind) return ERR_PTR(-ENODEV); group = iommu_group_get(dev); @@ -2836,9 +2834,9 @@ void iommu_sva_unbind_device(struct iommu_sva *handle) { struct iommu_group *group; struct device *dev = handle->dev; - const struct iommu_ops *ops = dev->bus->iommu_ops; + const struct iommu_ops *ops = dev_iommu_ops(dev); - if (!ops || !ops->sva_unbind) + if (!ops->sva_unbind) return; group = iommu_group_get(dev); @@ -2855,9 +2853,9 @@ EXPORT_SYMBOL_GPL(iommu_sva_unbind_device); u32 iommu_sva_get_pasid(struct iommu_sva *handle) { - const struct iommu_ops *ops = handle->dev->bus->iommu_ops; + const struct iommu_ops *ops = dev_iommu_ops(handle->dev); - if (!ops || !ops->sva_get_pasid) + if (!ops->sva_get_pasid) return IOMMU_PASID_INVALID; return ops->sva_get_pasid(handle); -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu