iommu/dma: Remove redundant "!dev" checks

iommu_dma_init_domain() is now only called from iommu_setup_dma_ops(),
which has already assumed dev to be non-NULL.

Reviewed-by: John Garry <john.garry@huawei.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/06024523c080364390016550065e3cfe8031367e.1628682049.git.robin.murphy@arm.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 98ba927..afaa1f9 100644 (file)
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -370,7 +370,7 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
 
        init_iova_domain(iovad, 1UL << order, base_pfn);
 
-       if (!cookie->fq_domain && (!dev || !dev_is_untrusted(dev)) &&
+       if (!cookie->fq_domain && !dev_is_untrusted(dev) &&
            domain->ops->flush_iotlb_all && !iommu_get_dma_strict(domain)) {
                if (init_iova_flush_queue(iovad, iommu_dma_flush_iotlb_all,
                                          iommu_dma_entry_dtor))
@@ -379,9 +379,6 @@ static int iommu_dma_init_domain(struct iommu_domain *domain, dma_addr_t base,
                        cookie->fq_domain = domain;
        }
 
-       if (!dev)
-               return 0;
-
        return iova_reserve_iommu_regions(dev, domain);
 }