From 6a9200603d76de1f8029b83c041f8eef99877a65 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Wed, 27 Feb 2013 17:04:23 -0800
Subject: [PATCH] IB/mlx4: convert to idr_alloc()
Convert to the much saner new idr interface.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jack Morgenstein <jackm@dev.mellanox.co.il>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Roland Dreier <roland@purestorage.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/infiniband/hw/mlx4/cm.c | 32 +++++++++++++++-----------------
1 file changed, 15 insertions(+), 17 deletions(-)
diff --git a/drivers/infiniband/hw/mlx4/cm.c b/drivers/infiniband/hw/mlx4/cm.c
index dbc99d41605c..80e59ed864b3 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 = ((unsigned)ret + 1) & MAX_IDR_MASK;
+ 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);
--
2.20.1