diff options
Diffstat (limited to 'drivers/infiniband/hw/mlx4/cm.c')
| -rw-r--r-- | drivers/infiniband/hw/mlx4/cm.c | 32 |
1 files changed, 15 insertions, 17 deletions
diff --git a/drivers/infiniband/hw/mlx4/cm.c b/drivers/infiniband/hw/mlx4/cm.c index dbc99d41605..e0d79b2395e 100644 --- a/drivers/infiniband/hw/mlx4/cm.c +++ b/drivers/infiniband/hw/mlx4/cm.c @@ -203,7 +203,7 @@ static void sl_id_map_add(struct ib_device *ibdev, struct id_map_entry *new) static struct id_map_entry * id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id) { - int ret, id; + int ret; static int next_id; struct id_map_entry *ent; struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov; @@ -220,25 +220,23 @@ id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id) ent->dev = to_mdev(ibdev); INIT_DELAYED_WORK(&ent->timeout, id_map_ent_timeout); - do { - spin_lock(&to_mdev(ibdev)->sriov.id_map_lock); - ret = idr_get_new_above(&sriov->pv_id_table, ent, - next_id, &id); - if (!ret) { - next_id = ((unsigned) id + 1) & MAX_IDR_MASK; - ent->pv_cm_id = (u32)id; - sl_id_map_add(ibdev, ent); - } + idr_preload(GFP_KERNEL); + spin_lock(&to_mdev(ibdev)->sriov.id_map_lock); - spin_unlock(&sriov->id_map_lock); - } while (ret == -EAGAIN && idr_pre_get(&sriov->pv_id_table, GFP_KERNEL)); - /*the function idr_get_new_above can return -ENOSPC, so don't insert in that case.*/ - if (!ret) { - spin_lock(&sriov->id_map_lock); + ret = idr_alloc(&sriov->pv_id_table, ent, next_id, 0, GFP_NOWAIT); + if (ret >= 0) { + next_id = max(ret + 1, 0); + ent->pv_cm_id = (u32)ret; + sl_id_map_add(ibdev, ent); list_add_tail(&ent->list, &sriov->cm_list); - spin_unlock(&sriov->id_map_lock); - return ent; } + + spin_unlock(&sriov->id_map_lock); + idr_preload_end(); + + if (ret >= 0) + return ent; + /*error flow*/ kfree(ent); mlx4_ib_warn(ibdev, "No more space in the idr (err:0x%x)\n", ret); |