From: Avihai Horon avihaih@nvidia.com
[ Upstream commit 483d805191a23191f8294bbf9b4e94836f5d92e4 ]
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.163905549... 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 Signed-off-by: Sasha Levin sashal@kernel.org --- 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 179e8134d57fc..a14a3ec99ffe1 100644 --- a/drivers/infiniband/core/device.c +++ b/drivers/infiniband/core/device.c @@ -848,7 +848,8 @@ int ib_find_gid(struct ib_device *device, union ib_gid *gid, for (i = 0; i < device->port_immutable[port].gid_tbl_len; ++i) { ret = ib_query_gid(device, port, i, &tmp_gid, NULL); if (ret) - return ret; + continue; + if (!memcmp(&tmp_gid, gid, sizeof *gid)) { *port_num = port; if (index)