diff options
| author | Parav Pandit <parav@mellanox.com> | 2018-05-14 11:11:08 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-05-16 23:11:46 +0300 |
| commit | 0e225dcb7681c0a8e52fb9dc68bd8ab973de4ca2 (patch) | |
| tree | 24b3330a9794d08c1e477958c36c1a6e2d619f29 /drivers/infiniband/core/cm.c | |
| parent | a5c57d327272bdf3a8b19686eaca2ec683449e67 (diff) | |
| download | linux-0e225dcb7681c0a8e52fb9dc68bd8ab973de4ca2.tar.xz | |
IB/cm: Store and restore ah_attr during LAP msg processing
During CM LAP processing, ah_attr is reinitialized on receiving LAP
request. First likely during CM request processing.
ah_attr might get zero out if LAP processing fails.
Therefore, attempt to create new ah_attr for the LAP message.
If the initialization fails, continue with older ah_attr.
If the initialization passes, consider the new ah_attr by overwriting
the older one.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/cm.c')
| -rw-r--r-- | drivers/infiniband/core/cm.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 34b4defc3d1f..8b640cb88f3a 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -452,6 +452,32 @@ static void cm_set_private_data(struct cm_id_private *cm_id_priv, cm_id_priv->private_data_len = private_data_len; } +static int cm_init_av_for_lap(struct cm_port *port, struct ib_wc *wc, + struct ib_grh *grh, struct cm_av *av) +{ + struct rdma_ah_attr new_ah_attr; + int ret; + + av->port = port; + av->pkey_index = wc->pkey_index; + + /* + * av->ah_attr might be initialized based on past wc during incoming + * connect request or while sending out connect request. So initialize + * a new ah_attr on stack. If initialization fails, old ah_attr is + * used for sending any responses. If initialization is successful, + * than new ah_attr is used by overwriting old one. + */ + ret = ib_init_ah_attr_from_wc(port->cm_dev->ib_device, + port->port_num, wc, + grh, &new_ah_attr); + if (ret) + return ret; + + memcpy(&av->ah_attr, &new_ah_attr, sizeof(new_ah_attr)); + return 0; +} + static int cm_init_av_for_response(struct cm_port *port, struct ib_wc *wc, struct ib_grh *grh, struct cm_av *av) { @@ -3233,9 +3259,9 @@ static int cm_lap_handler(struct cm_work *work) goto unlock; } - ret = cm_init_av_for_response(work->port, work->mad_recv_wc->wc, - work->mad_recv_wc->recv_buf.grh, - &cm_id_priv->av); + ret = cm_init_av_for_lap(work->port, work->mad_recv_wc->wc, + work->mad_recv_wc->recv_buf.grh, + &cm_id_priv->av); if (ret) goto unlock; |