A warning is triggered when repeatedly connecting and disconnecting the
rnbd:
list_add corruption. prev->next should be next (ffff88800b13e480), but was ffff88801ecd1338. (prev=ffff88801ecd1340).
WARNING: CPU: 1 PID: 36562 at lib/list_debug.c:32 __list_add_valid_or_report+0x7f/0xa0
Workqueue: ib_cm cm_work_handler [ib_cm]
RIP: 0010:__list_add_valid_or_report+0x7f/0xa0
? __list_add_valid_or_report+0x7f/0xa0
ib_register_event_handler+0x65/0x93 [ib_core]
rtrs_srv_ib_dev_init+0x29/0x30 [rtrs_server]
rtrs_ib_dev_find_or_add+0x124/0x1d0 [rtrs_core]
__alloc_path+0x46c/0x680 [rtrs_server]
? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]
? rcu_is_watching+0xd/0x40
? __mutex_lock+0x312/0xcf0
? get_or_create_srv+0xad/0x310 [rtrs_server]
? rtrs_rdma_connect+0xa6/0x2d0 [rtrs_server]
rtrs_rdma_connect+0x23c/0x2d0 [rtrs_server]
? __lock_release+0x1b1/0x2d0
cma_cm_event_handler+0x4a/0x1a0 [rdma_cm]
cma_ib_req_handler+0x3a0/0x7e0 [rdma_cm]
cm_process_work+0x28/0x1a0 [ib_cm]
? _raw_spin_unlock_irq+0x2f/0x50
cm_req_handler+0x618/0xa60 [ib_cm]
cm_work_handler+0x71/0x520 [ib_cm]
Fix it by invoking the `deinit()` to appropriately unregister the IB event
handler.
Fixes: 667db86bcbe8 ("RDMA/rtrs: Register ib event handler")
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
drivers/infiniband/ulp/rtrs/rtrs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
index 4e17d546d4cc..3b3efecd0817 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs.c
@@ -580,6 +580,9 @@ static void dev_free(struct kref *ref)
dev = container_of(ref, typeof(*dev), ref);
pool = dev->pool;
+ if (pool->ops && pool->ops->deinit)
+ pool->ops->deinit(dev);
+
mutex_lock(&pool->mutex);
list_del(&dev->entry);
mutex_unlock(&pool->mutex);
--
2.47.0
