diff mbox series

[for-next,v2,2/8] RDMA/rxe: Warn if refcnt zero in rxe_put

Message ID 20230301045154.23733-3-rpearsonhpe@gmail.com (mailing list archive)
State Superseded
Headers show
Series RDMA/rxe: Correct qp reference counting | expand

Commit Message

Bob Pearson March 1, 2023, 4:51 a.m. UTC 
This patch adds a WARN_ON if the reference count of the object
passed to __rxe_put() is <= 0. This can only happen if there is a
bug in the rxe driver but has bad consequences if there is.

Signed-off-by: Bob Pearson <rpearsonhpe@gmail.com>
---
 drivers/infiniband/sw/rxe/rxe_pool.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c
index 3f6bd672cc2d..1b160e36b751 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -244,6 +244,8 @@  int __rxe_get(struct rxe_pool_elem *elem)
 
 int __rxe_put(struct rxe_pool_elem *elem)
 {
+	if (WARN_ON(kref_read(&elem->ref_cnt) <= 0))
+		return 0;
 	return kref_put(&elem->ref_cnt, rxe_elem_release);
 }