From e5fd91f1ef340da553f7a79da9540c3db711c937 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 8 Sep 2015 01:01:14 -0300 Subject: Linux-libre 4.2-gnu --- drivers/infiniband/core/cm.c | 87 ++++++++++++++++++++++++++++++++++++++------ 1 file changed, 76 insertions(+), 11 deletions(-) (limited to 'drivers/infiniband/core/cm.c') diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 0271608a5..3a972ebf3 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -169,6 +169,7 @@ struct cm_device { struct ib_device *ib_device; struct device *device; u8 ack_delay; + int going_down; struct cm_port *port[0]; }; @@ -267,7 +268,8 @@ static int cm_alloc_msg(struct cm_id_private *cm_id_priv, m = ib_create_send_mad(mad_agent, cm_id_priv->id.remote_cm_qpn, cm_id_priv->av.pkey_index, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, - GFP_ATOMIC); + GFP_ATOMIC, + IB_MGMT_BASE_VERSION); if (IS_ERR(m)) { ib_destroy_ah(ah); return PTR_ERR(m); @@ -297,7 +299,8 @@ static int cm_alloc_response_msg(struct cm_port *port, m = ib_create_send_mad(port->mad_agent, 1, mad_recv_wc->wc->pkey_index, 0, IB_MGMT_MAD_HDR, IB_MGMT_MAD_DATA, - GFP_ATOMIC); + GFP_ATOMIC, + IB_MGMT_BASE_VERSION); if (IS_ERR(m)) { ib_destroy_ah(ah); return PTR_ERR(m); @@ -803,6 +806,11 @@ static void cm_enter_timewait(struct cm_id_private *cm_id_priv) { int wait_time; unsigned long flags; + struct cm_device *cm_dev; + + cm_dev = ib_get_client_data(cm_id_priv->id.device, &cm_client); + if (!cm_dev) + return; spin_lock_irqsave(&cm.lock, flags); cm_cleanup_timewait(cm_id_priv->timewait_info); @@ -816,8 +824,14 @@ static void cm_enter_timewait(struct cm_id_private *cm_id_priv) */ cm_id_priv->id.state = IB_CM_TIMEWAIT; wait_time = cm_convert_to_ms(cm_id_priv->av.timeout); - queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, - msecs_to_jiffies(wait_time)); + + /* Check if the device started its remove_one */ + spin_lock_irq(&cm.lock); + if (!cm_dev->going_down) + queue_delayed_work(cm.wq, &cm_id_priv->timewait_info->work.work, + msecs_to_jiffies(wait_time)); + spin_unlock_irq(&cm.lock); + cm_id_priv->timewait_info = NULL; } @@ -3303,6 +3317,11 @@ static int cm_establish(struct ib_cm_id *cm_id) struct cm_work *work; unsigned long flags; int ret = 0; + struct cm_device *cm_dev; + + cm_dev = ib_get_client_data(cm_id->device, &cm_client); + if (!cm_dev) + return -ENODEV; work = kmalloc(sizeof *work, GFP_ATOMIC); if (!work) @@ -3341,7 +3360,17 @@ static int cm_establish(struct ib_cm_id *cm_id) work->remote_id = cm_id->remote_id; work->mad_recv_wc = NULL; work->cm_event.event = IB_CM_USER_ESTABLISHED; - queue_delayed_work(cm.wq, &work->work, 0); + + /* Check if the device started its remove_one */ + spin_lock_irq(&cm.lock); + if (!cm_dev->going_down) { + queue_delayed_work(cm.wq, &work->work, 0); + } else { + kfree(work); + ret = -ENODEV; + } + spin_unlock_irq(&cm.lock); + out: return ret; } @@ -3392,6 +3421,7 @@ static void cm_recv_handler(struct ib_mad_agent *mad_agent, enum ib_cm_event_type event; u16 attr_id; int paths = 0; + int going_down = 0; switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { case CM_REQ_ATTR_ID: @@ -3450,7 +3480,19 @@ static void cm_recv_handler(struct ib_mad_agent *mad_agent, work->cm_event.event = event; work->mad_recv_wc = mad_recv_wc; work->port = port; - queue_delayed_work(cm.wq, &work->work, 0); + + /* Check if the device started its remove_one */ + spin_lock_irq(&cm.lock); + if (!port->cm_dev->going_down) + queue_delayed_work(cm.wq, &work->work, 0); + else + going_down = 1; + spin_unlock_irq(&cm.lock); + + if (going_down) { + kfree(work); + ib_free_recv_mad(mad_recv_wc); + } } static int cm_init_qp_init_attr(struct cm_id_private *cm_id_priv, @@ -3759,11 +3801,9 @@ static void cm_add_one(struct ib_device *ib_device) }; unsigned long flags; int ret; + int count = 0; u8 i; - if (rdma_node_get_transport(ib_device->node_type) != RDMA_TRANSPORT_IB) - return; - cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * ib_device->phys_port_cnt, GFP_KERNEL); if (!cm_dev) @@ -3771,7 +3811,7 @@ static void cm_add_one(struct ib_device *ib_device) cm_dev->ib_device = ib_device; cm_get_ack_delay(cm_dev); - + cm_dev->going_down = 0; cm_dev->device = device_create(&cm_class, &ib_device->dev, MKDEV(0, 0), NULL, "%s", ib_device->name); @@ -3782,6 +3822,9 @@ static void cm_add_one(struct ib_device *ib_device) set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); for (i = 1; i <= ib_device->phys_port_cnt; i++) { + if (!rdma_cap_ib_cm(ib_device, i)) + continue; + port = kzalloc(sizeof *port, GFP_KERNEL); if (!port) goto error1; @@ -3808,7 +3851,13 @@ static void cm_add_one(struct ib_device *ib_device) ret = ib_modify_port(ib_device, i, 0, &port_modify); if (ret) goto error3; + + count++; } + + if (!count) + goto free; + ib_set_client_data(ib_device, &cm_client, cm_dev); write_lock_irqsave(&cm.device_lock, flags); @@ -3824,11 +3873,15 @@ error1: port_modify.set_port_cap_mask = 0; port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; while (--i) { + if (!rdma_cap_ib_cm(ib_device, i)) + continue; + port = cm_dev->port[i-1]; ib_modify_port(ib_device, port->port_num, 0, &port_modify); ib_unregister_mad_agent(port->mad_agent); cm_remove_port_fs(port); } +free: device_unregister(cm_dev->device); kfree(cm_dev); } @@ -3851,11 +3904,23 @@ static void cm_remove_one(struct ib_device *ib_device) list_del(&cm_dev->list); write_unlock_irqrestore(&cm.device_lock, flags); + spin_lock_irq(&cm.lock); + cm_dev->going_down = 1; + spin_unlock_irq(&cm.lock); + for (i = 1; i <= ib_device->phys_port_cnt; i++) { + if (!rdma_cap_ib_cm(ib_device, i)) + continue; + port = cm_dev->port[i-1]; ib_modify_port(ib_device, port->port_num, 0, &port_modify); - ib_unregister_mad_agent(port->mad_agent); + /* + * We flush the queue here after the going_down set, this + * verify that no new works will be queued in the recv handler, + * after that we can call the unregister_mad_agent + */ flush_workqueue(cm.wq); + ib_unregister_mad_agent(port->mad_agent); cm_remove_port_fs(port); } device_unregister(cm_dev->device); -- cgit v1.2.3-54-g00ecf