linux-kernel - [PATCH] rxe: fix xa_alloc_cycle() error return value check

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Message-Id: <20220609064242.1444485-1-dzm91@hust.edu.cn>
Date:   Thu,  9 Jun 2022 14:42:42 +0800
From:   Dongliang Mu <dzm91@...t.edu.cn>
To:     Zhu Yanjun <zyjzyj2000@...il.com>, Jason Gunthorpe <jgg@...pe.ca>,
        Leon Romanovsky <leon@...nel.org>
Cc:     Dongliang Mu <mudongliangabcd@...il.com>,
        linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] rxe: fix xa_alloc_cycle() error return value check

From: Dongliang Mu <mudongliangabcd@...il.com>

Currently rxe_alloc checks ret to indicate error, but 1 is also a valid
return and just indicates that the allocation succeeded with a wrap.

Fix this by modifying the check to be < 0.

Signed-off-by: Dongliang Mu <mudongliangabcd@...il.com>
---
 drivers/infiniband/sw/rxe/rxe_pool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c
index 19b14826385b..1cc8e847ccff 100644
--- a/drivers/infiniband/sw/rxe/rxe_pool.c
+++ b/drivers/infiniband/sw/rxe/rxe_pool.c
@@ -139,7 +139,7 @@ void *rxe_alloc(struct rxe_pool *pool)
 
 	err = xa_alloc_cyclic(&pool->xa, &elem->index, elem, pool->limit,
 			      &pool->next, GFP_KERNEL);
-	if (err)
+	if (err < 0)
 		goto err_free;
 
 	return obj;
-- 
2.25.1