[PATCH v4 02/19] iommu/apple-dart: Remove detach_dev callback

Lu Baolu
2023-01-04T13:06:34Z

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

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Sven Peter <sven@svenpeter.dev>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/apple-dart.c | 24 ------------------------
1 file changed, 24 deletions(-)

diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
index 4f4a323be0d0..96843d468801 100644
--- a/drivers/iommu/apple-dart.c
+++ b/drivers/iommu/apple-dart.c
@@ -486,13 +486,6 @@ static int apple_dart_domain_add_streams(struct apple_dart_domain *domain,
true);
}

-static int apple_dart_domain_remove_streams(struct apple_dart_domain *domain,
- struct apple_dart_master_cfg *cfg)
-{
- return apple_dart_mod_streams(domain->stream_maps, cfg->stream_maps,
- false);
-}
-
static int apple_dart_attach_dev(struct iommu_domain *domain,
struct device *dev)
{
@@ -535,22 +528,6 @@ static int apple_dart_attach_dev(struct iommu_domain *domain,
return ret;
}

-static void apple_dart_detach_dev(struct iommu_domain *domain,
- struct device *dev)
-{
- int i;
- struct apple_dart_stream_map *stream_map;
- struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
- struct apple_dart_domain *dart_domain = to_dart_domain(domain);
-
- for_each_stream_map(i, cfg, stream_map)
- apple_dart_hw_disable_dma(stream_map);
-
- if (domain->type == IOMMU_DOMAIN_DMA ||
- domain->type == IOMMU_DOMAIN_UNMANAGED)
- apple_dart_domain_remove_streams(dart_domain, cfg);
-}
-
static struct iommu_device *apple_dart_probe_device(struct device *dev)
{
struct apple_dart_master_cfg *cfg = dev_iommu_priv_get(dev);
@@ -780,7 +757,6 @@ static const struct iommu_ops apple_dart_iommu_ops = {
.owner = THIS_MODULE,
.default_domain_ops = &(const struct iommu_domain_ops) {
.attach_dev = apple_dart_attach_dev,
- .detach_dev = apple_dart_detach_dev,
.map_pages = apple_dart_map_pages,
.unmap_pages = apple_dart_unmap_pages,
.flush_iotlb_all = apple_dart_flush_iotlb_all,
--
2.34.1