diff options
| author | Mark Zhang <markzhang@nvidia.com> | 2022-11-07 10:51:36 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2022-11-15 09:56:45 +0200 |
| commit | ecacb3751f254572af0009b9501e2cdc83a30b6a (patch) | |
| tree | 3c6aae2469168189a7b5fb7308999f2b90935e21 /drivers/infiniband/core/nldev.c | |
| parent | 5e15ff29b156bbbdeadae230c8ecd5ecd8ca2477 (diff) | |
RDMA/nldev: Return "-EAGAIN" if the cm_id isn't from expected port
When filling a cm_id entry, return "-EAGAIN" instead of 0 if the cm_id
doesn'the have the same port as requested, otherwise an incomplete entry
may be returned, which causes "rdam res show cm_id" to return an error.
For example on a machine with two rdma devices with "rping -C 1 -v -s"
running background, the "rdma" command fails:
$ rdma -V
rdma utility, iproute2-5.19.0
$ rdma res show cm_id
link mlx5_0/- cm-idn 0 state LISTEN ps TCP pid 28056 comm rping src-addr 0.0.0.0:7174
error: Protocol not available
While with this fix it succeeds:
$ rdma res show cm_id
link mlx5_0/- cm-idn 0 state LISTEN ps TCP pid 26395 comm rping src-addr 0.0.0.0:7174
link mlx5_1/- cm-idn 0 state LISTEN ps TCP pid 26395 comm rping src-addr 0.0.0.0:7174
Fixes: 00313983cda6 ("RDMA/nldev: provide detailed CM_ID information")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/a08e898cdac5e28428eb749a99d9d981571b8ea7.1667810736.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'drivers/infiniband/core/nldev.c')
| -rw-r--r-- | drivers/infiniband/core/nldev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c index b92358f606d0..2be76a3fdd87 100644 --- a/drivers/infiniband/core/nldev.c +++ b/drivers/infiniband/core/nldev.c @@ -552,7 +552,7 @@ static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin, struct rdma_cm_id *cm_id = &id_priv->id; if (port && port != cm_id->port_num) - return 0; + return -EAGAIN; if (cm_id->port_num && nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, cm_id->port_num)) |