From 483d805191a23191f8294bbf9b4e94836f5d92e4 Mon Sep 17 00:00:00 2001
From: Avihai Horon <avihaih@nvidia.com>
Date: Thu, 9 Dec 2021 15:16:06 +0200
Subject: [PATCH] RDMA/core: Let ib_find_gid() continue search even after empty
entry
Currently, ib_find_gid() will stop searching after encountering the first
empty GID table entry. This behavior is wrong since neither IB nor RoCE
spec enforce tightly packed GID tables.
For example, when a valid GID entry exists at index N, and if a GID entry
is empty at index N-1, ib_find_gid() will fail to find the valid entry.
Fix it by making ib_find_gid() continue searching even after encountering
missing entries.
Fixes: 5eb620c81ce3 ("IB/core: Add helpers for uncached GID and P_Key searches")
Link: https://lore.kernel.org/r/e55d331b96cecfc2cf19803d16e7109ea966882d.1639055490.git.leonro@nvidia.com
Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Reviewed-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/infiniband/core/device.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 22a4adda7981d..a311df07b1bdb 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2461,7 +2461,8 @@ int ib_find_gid(struct ib_device *device, union ib_gid *gid,
++i) {
ret = rdma_query_gid(device, port, i, &tmp_gid);
if (ret)
- return ret;
+ continue;
+
if (!memcmp(&tmp_gid, gid, sizeof *gid)) {
*port_num = port;
if (index)
--
2.30.2