}
/**
- * rxe_mcast_delete - delete multicast address from rxe device
+ * rxe_mcast_del - delete multicast address from rxe device
* @rxe: rxe device object
* @mgid: multicast address as a gid
*
* Returns 0 on success else an error
*/
-static int rxe_mcast_delete(struct rxe_dev *rxe, union ib_gid *mgid)
+static int rxe_mcast_del(struct rxe_dev *rxe, union ib_gid *mgid)
{
unsigned char ll_addr[ETH_ALEN];
* @mcg: new mcg object
*
* Context: caller should hold rxe->mcg lock
- * Returns: 0 on success else an error
*/
-static int __rxe_init_mcg(struct rxe_dev *rxe, union ib_gid *mgid,
- struct rxe_mcg *mcg)
+static void __rxe_init_mcg(struct rxe_dev *rxe, union ib_gid *mgid,
+ struct rxe_mcg *mcg)
{
- int err;
-
- err = rxe_mcast_add(rxe, mgid);
- if (unlikely(err))
- return err;
-
kref_init(&mcg->ref_cnt);
memcpy(&mcg->mgid, mgid, sizeof(mcg->mgid));
INIT_LIST_HEAD(&mcg->qp_list);
*/
kref_get(&mcg->ref_cnt);
__rxe_insert_mcg(mcg);
-
- return 0;
}
/**
if (mcg)
return mcg;
+ /* check to see if we have reached limit */
+ if (atomic_inc_return(&rxe->mcg_num) > rxe->attr.max_mcast_grp) {
+ err = -ENOMEM;
+ goto err_dec;
+ }
+
/* speculative alloc of new mcg */
mcg = kzalloc(sizeof(*mcg), GFP_KERNEL);
if (!mcg)
/* re-check to see if someone else just added it */
tmp = __rxe_lookup_mcg(rxe, mgid);
if (tmp) {
+ spin_unlock_irqrestore(&rxe->mcg_lock, flags);
+ atomic_dec(&rxe->mcg_num);
kfree(mcg);
- mcg = tmp;
- goto out;
- }
-
- if (atomic_inc_return(&rxe->mcg_num) > rxe->attr.max_mcast_grp) {
- err = -ENOMEM;
- goto err_dec;
+ return tmp;
}
- err = __rxe_init_mcg(rxe, mgid, mcg);
- if (err)
- goto err_dec;
-out:
+ __rxe_init_mcg(rxe, mgid, mcg);
spin_unlock_irqrestore(&rxe->mcg_lock, flags);
- return mcg;
+ /* add mcast address outside of lock */
+ err = rxe_mcast_add(rxe, mgid);
+ if (!err)
+ return mcg;
+
+ kfree(mcg);
err_dec:
atomic_dec(&rxe->mcg_num);
- spin_unlock_irqrestore(&rxe->mcg_lock, flags);
- kfree(mcg);
return ERR_PTR(err);
}
__rxe_remove_mcg(mcg);
kref_put(&mcg->ref_cnt, rxe_cleanup_mcg);
- rxe_mcast_delete(mcg->rxe, &mcg->mgid);
atomic_dec(&rxe->mcg_num);
}
{
unsigned long flags;
+ /* delete mcast address outside of lock */
+ rxe_mcast_del(mcg->rxe, &mcg->mgid);
+
spin_lock_irqsave(&mcg->rxe->mcg_lock, flags);
__rxe_destroy_mcg(mcg);
spin_unlock_irqrestore(&mcg->rxe->mcg_lock, flags);