Finally, the dead lock appears.
CPU0
----
lock(&xa->xa_lock#15); <----- rxe_alloc
<Interrupt>
lock(&xa->xa_lock#15); <---- rxe_pool_get_index
*** DEADLOCK ***
Fixes: 3225717f6dfa ("RDMA/rxe: Replace red-black trees by carrays")
Reported-and-tested-by: Yi Zhang <yi.zhang@xxxxxxxxxx>
Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
---
drivers/infiniband/sw/rxe/rxe_pool.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c
index 67f1d4733682..7b12a52fed35 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -138,8 +138,8 @@ void *rxe_alloc(struct rxe_pool *pool)
elem->obj = obj;
kref_init(&elem->ref_cnt);
- err = xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit,
- &pool->next, GFP_KERNEL);
+ err = xa_alloc_cyclic_irq(&pool->xa, &elem->index, elem, pool->limit,
+ &pool->next, GFP_KERNEL);
if (err)
goto err_free;
--
2.27.0
