[PATCH rdma-next v3 13/14] RDMA/rxe: Implement disassociate_ucontext callback

From: Jiri Pirko <[email protected]>

Implement an empty disassociate_ucontext() callback so the RDMA core
can move rxe devices between net namespaces. The core requires this
callback to reset user contexts without waiting for userspace.

rxe needs no teardown here: its user-mapped queues live in
reference-counted vmalloc memory (see rxe_mmap.c) that stays valid
while userspace holds the mappings.

Signed-off-by: Jiri Pirko <[email protected]>
---
 drivers/infiniband/sw/rxe/rxe_verbs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index 1ec130fee8ea..6eb10d2f0653 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -240,6 +240,10 @@ static void rxe_dealloc_ucontext(struct ib_ucontext *ibuc)
 		rxe_err_uc(uc, "cleanup failed, err = %d\n", err);
 }
 
+static void rxe_disassociate_ucontext(struct ib_ucontext *ibuc)
+{
+}
+
 /* pd */
 static int rxe_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata)
 {
@@ -1478,6 +1482,7 @@ static const struct ib_device_ops rxe_dev_ops = {
 	.destroy_srq = rxe_destroy_srq,
 	.detach_mcast = rxe_detach_mcast,
 	.device_group = &rxe_attr_group,
+	.disassociate_ucontext = rxe_disassociate_ucontext,
 	.enable_driver = rxe_enable_driver,
 	.get_dma_mr = rxe_get_dma_mr,
 	.get_hw_stats = rxe_ib_get_hw_stats,
-- 
2.54.0