diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c index d26730eec720..cfcd55175572 100644 --- a/drivers/infiniband/sw/rxe/rxe_pool.c +++ b/drivers/infiniband/sw/rxe/rxe_pool.c @@ -343,13 +343,54 @@ void *rxe_alloc_nl(struct rxe_pool *pool) struct rxe_pool_entry *elem; u8 *obj; - might_sleep_if(!(pool->flags & RXE_POOL_ATOMIC)); - if (pool->state != RXE_POOL_STATE_VALID) return NULL; kref_get(&pool->ref_cnt); + if (!ib_device_try_get(&pool->rxe->ib_dev)) + goto out_put_pool; + + if (atomic_inc_return(&pool->num_elem) > pool->max_elem) + goto out_cnt; + + obj = kzalloc(info->size, GFP_ATOMIC); + if (!obj) + goto out_cnt; + + elem = (struct rxe_pool_entry *)(obj + info->elem_offset); + + elem->pool = pool; + kref_init(&elem->ref_cnt); + + return obj; + +out_cnt: + atomic_dec(&pool->num_elem); + ib_device_put(&pool->rxe->ib_dev); +out_put_pool: + rxe_pool_put(pool); + return NULL; +} + +void *rxe_alloc(struct rxe_pool *pool) +{ + unsigned long flags; + struct rxe_type_info *info = &rxe_type_info[pool->type]; + struct rxe_pool_entry *elem; + u8 *obj; + + might_sleep_if(!(pool->flags & RXE_POOL_ATOMIC)); + + read_lock_irqsave(&pool->pool_lock, flags); + if (pool->state != RXE_POOL_STATE_VALID) { + read_unlock_irqrestore(&pool->pool_lock, flags); + return NULL; + } + + kref_get(&pool->ref_cnt); + read_unlock_irqrestore(&pool->pool_lock, flags); + if (!ib_device_try_get(&pool->rxe->ib_dev)) goto out_put_pool; @@ -376,18 +417,6 @@ void *rxe_alloc_nl(struct rxe_pool *pool) return NULL; } -void *rxe_alloc(struct rxe_pool *pool) -{ - u8 *obj; - unsigned long flags; - - read_lock_irqsave(&pool->pool_lock, flags); - obj = rxe_alloc_nl(pool); - read_unlock_irqrestore(&pool->pool_lock, flags); - - return obj; -} - int __rxe_add_to_pool(struct rxe_pool *pool, struct rxe_pool_entry *elem) { unsigned long flags;