Source of connection.c - linux-imx - PHYTEC BitBucket (Stash)

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    __u32 version;
​
    /* Initialize the vmbus connection */
    vmbus_connection.conn_state = CONNECTING;
    vmbus_connection.work_queue = create_workqueue("hv_vmbus_con");
    if (!vmbus_connection.work_queue) {
        ret = -ENOMEM;
        goto cleanup;
    }
​
    vmbus_connection.handle_primary_chan_wq =
        create_workqueue("hv_pri_chan");
    if (!vmbus_connection.handle_primary_chan_wq) {
        ret = -ENOMEM;
        goto cleanup;
    }
​
    vmbus_connection.handle_sub_chan_wq =
        create_workqueue("hv_sub_chan");
    if (!vmbus_connection.handle_sub_chan_wq) {
        ret = -ENOMEM;
        goto cleanup;
    }
​
    INIT_LIST_HEAD(&vmbus_connection.chn_msg_list);
    spin_lock_init(&vmbus_connection.channelmsg_lock);
​
    INIT_LIST_HEAD(&vmbus_connection.chn_list);
    mutex_init(&vmbus_connection.channel_mutex);
​
    /*
     * Setup the vmbus event connection for channel interrupt
     * abstraction stuff
     */
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    return ret;
}
​
void vmbus_disconnect(void)
{
    /*
     * First send the unload request to the host.
     */
    vmbus_initiate_unload(false);
​
    if (vmbus_connection.work_queue) {
        drain_workqueue(vmbus_connection.work_queue);
    if (vmbus_connection.handle_sub_chan_wq)
        destroy_workqueue(vmbus_connection.handle_sub_chan_wq);
​
    if (vmbus_connection.handle_primary_chan_wq)
        destroy_workqueue(vmbus_connection.handle_primary_chan_wq);
​
    if (vmbus_connection.work_queue)
        destroy_workqueue(vmbus_connection.work_queue);
    }
​
    if (vmbus_connection.int_page) {
        free_pages((unsigned long)vmbus_connection.int_page, 0);
        vmbus_connection.int_page = NULL;
    }
​
    free_pages((unsigned long)vmbus_connection.monitor_pages[0], 0);
    free_pages((unsigned long)vmbus_connection.monitor_pages[1], 0);
    vmbus_connection.monitor_pages[0] = NULL;
    vmbus_connection.monitor_pages[1] = NULL;