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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>
This commit is contained in:
Tejun Heo 2013-02-27 17:04:23 -08:00 committed by Linus Torvalds
parent 5c213f8641
commit 6a9200603d
1 changed files with 15 additions and 17 deletions
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32
drivers/infiniband/hw/mlx4/cm.c
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@ -203,7 +203,7 @@ static void sl_id_map_add(struct ib_device *ibdev, struct id_map_entry *new)
static struct id_map_entry * static struct id_map_entry *
id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id) id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id)
{ {
int ret, id; int ret;
static int next_id; static int next_id;
struct id_map_entry *ent; struct id_map_entry *ent;
struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov; 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); ent->dev = to_mdev(ibdev);
INIT_DELAYED_WORK(&ent->timeout, id_map_ent_timeout); INIT_DELAYED_WORK(&ent->timeout, id_map_ent_timeout);
do { idr_preload(GFP_KERNEL);
spin_lock(&to_mdev(ibdev)->sriov.id_map_lock); 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);
}
spin_unlock(&sriov->id_map_lock); ret = idr_alloc(&sriov->pv_id_table, ent, next_id, 0, GFP_NOWAIT);
} while (ret == -EAGAIN && idr_pre_get(&sriov->pv_id_table, GFP_KERNEL)); if (ret >= 0) {
/*the function idr_get_new_above can return -ENOSPC, so don't insert in that case.*/ next_id = ((unsigned)ret + 1) & MAX_IDR_MASK;
if (!ret) { ent->pv_cm_id = (u32)ret;
spin_lock(&sriov->id_map_lock); sl_id_map_add(ibdev, ent);
list_add_tail(&ent->list, &sriov->cm_list); 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*/ /*error flow*/
kfree(ent); kfree(ent);
mlx4_ib_warn(ibdev, "No more space in the idr (err:0x%x)\n", ret); mlx4_ib_warn(ibdev, "No more space in the idr (err:0x%x)\n", ret);