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authorDotan Barak <dotanb@dev.mellanox.co.il>2008-04-17 08:09:34 +0400
committerRoland Dreier <rolandd@cisco.com>2008-04-17 08:09:34 +0400
commit0df67030958bad07c3f82f392e3ffb785c56e48d (patch)
tree317bdffc336a40e344f50b05492de6350eb38f7a /drivers/infiniband
parent5121df3ae45731ce98374a1b0b4d48f072643f42 (diff)
downloadlinux-0df67030958bad07c3f82f392e3ffb785c56e48d.tar.xz
IB/mlx4: Update QP state if query QP succeeds
If the QP was moved to another state (such as SQE) by the hardware, then after this change the user won't have to set the IBV_QP_CUR_STATE mask in order to execute modify QP in order to recover from this state. Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/mlx4/qp.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index 38e651a67589..b75efae7e449 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1785,7 +1785,9 @@ int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr
struct mlx4_ib_qp *qp = to_mqp(ibqp);
struct mlx4_qp_context context;
int mlx4_state;
- int err;
+ int err = 0;
+
+ mutex_lock(&qp->mutex);
if (qp->state == IB_QPS_RESET) {
qp_attr->qp_state = IB_QPS_RESET;
@@ -1793,12 +1795,15 @@ int mlx4_ib_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr
}
err = mlx4_qp_query(dev->dev, &qp->mqp, &context);
- if (err)
- return -EINVAL;
+ if (err) {
+ err = -EINVAL;
+ goto out;
+ }
mlx4_state = be32_to_cpu(context.flags) >> 28;
- qp_attr->qp_state = to_ib_qp_state(mlx4_state);
+ qp->state = to_ib_qp_state(mlx4_state);
+ qp_attr->qp_state = qp->state;
qp_attr->path_mtu = context.mtu_msgmax >> 5;
qp_attr->path_mig_state =
to_ib_mig_state((be32_to_cpu(context.flags) >> 11) & 0x3);
@@ -1857,6 +1862,8 @@ done:
qp_init_attr->cap = qp_attr->cap;
- return 0;
+out:
+ mutex_unlock(&qp->mutex);
+ return err;
}