[PATCH 1/3] RDMA/usnic: Remove iommu_set_fault_handler()

Jason Gunthorpe
2025-10-22T17:13:00Z

The handler in usnic just prints a fault report message, the iommu drivers
all do a better job of that these days. Just remove the use of this old
API.

Acked-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/infiniband/hw/usnic/usnic_uiom.c | 13 -------------
1 file changed, 13 deletions(-)

diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c
index 3fbf99757b1148..f7fb6246c83aba 100644
--- a/drivers/infiniband/hw/usnic/usnic_uiom.c
+++ b/drivers/infiniband/hw/usnic/usnic_uiom.c
@@ -51,17 +51,6 @@
((void *) &((struct usnic_uiom_chunk *) 0)->page_list[1] - \
(void *) &((struct usnic_uiom_chunk *) 0)->page_list[0]))

-static int usnic_uiom_dma_fault(struct iommu_domain *domain,
- struct device *dev,
- unsigned long iova, int flags,
- void *token)
-{
- usnic_err("Device %s iommu fault domain 0x%p va 0x%lx flags 0x%x\n",
- dev_name(dev),
- domain, iova, flags);
- return -ENOSYS;
-}
-
static void usnic_uiom_put_pages(struct list_head *chunk_list, int dirty)
{
struct usnic_uiom_chunk *chunk, *tmp;
@@ -450,8 +439,6 @@ struct usnic_uiom_pd *usnic_uiom_alloc_pd(struct device *dev)
return ERR_CAST(domain);
}

- iommu_set_fault_handler(pd->domain, usnic_uiom_dma_fault, NULL);
-
spin_lock_init(&pd->lock);
INIT_LIST_HEAD(&pd->devs);

--
2.43.0