[PATCH v3 08/20] iommu/sprd: Remove detach_dev callback

Lu Baolu
2022-11-28T06:55:33Z

The IOMMU driver supports default domain, so the detach_dev op will never
be called. Remove it to avoid dead code.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/sprd-iommu.c | 16 ----------------
1 file changed, 16 deletions(-)

diff --git a/drivers/iommu/sprd-iommu.c b/drivers/iommu/sprd-iommu.c
index 219bfa11f7f4..ae94d74b73f4 100644
--- a/drivers/iommu/sprd-iommu.c
+++ b/drivers/iommu/sprd-iommu.c
@@ -255,21 +255,6 @@ static int sprd_iommu_attach_device(struct iommu_domain *domain,
return 0;
}

-static void sprd_iommu_detach_device(struct iommu_domain *domain,
- struct device *dev)
-{
- struct sprd_iommu_domain *dom = to_sprd_domain(domain);
- struct sprd_iommu_device *sdev = dom->sdev;
- size_t pgt_size = sprd_iommu_pgt_size(domain);
-
- if (!sdev)
- return;
-
- dma_free_coherent(sdev->dev, pgt_size, dom->pgt_va, dom->pgt_pa);
- sprd_iommu_hw_en(sdev, false);
- dom->sdev = NULL;
-}
-
static int sprd_iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t pgsize, size_t pgcount,
int prot, gfp_t gfp, size_t *mapped)
@@ -414,7 +399,6 @@ static const struct iommu_ops sprd_iommu_ops = {
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
.attach_dev = sprd_iommu_attach_device,
- .detach_dev = sprd_iommu_detach_device,
.map_pages = sprd_iommu_map,
.unmap_pages = sprd_iommu_unmap,
.iotlb_sync_map = sprd_iommu_sync_map,
--
2.34.1