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    Subject[PATCH 01/18] Staging: hv: vmbus_driver cannot be unloaded; cleanup accordingly
    Date
    The vmbus driver cannot be unloaded; the windows host does not
    permit this: A) All guest resources given to the host cannot
    be recovered and B) Windows host does not permit reloading the
    vmbus_driver without re-booting the guest. Both these issues
    are host related. Acknowledge this reality and cleanup the
    vmbus driver accordingly. Note that, ideally we will want to handle
    the root device through the Hyper-V block driver. In this case
    unloading the vmbus driver will not be possible because of the
    dependency issues.

    Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
    Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
    Signed-off-by: Abhishek Kane <v-abkane@microsoft.com>
    Signed-off-by: Hank Janssen <hjanssen@microsoft.com>
    ---
    drivers/staging/hv/vmbus_drv.c | 32 --------------------------------
    1 files changed, 0 insertions(+), 32 deletions(-)

    diff --git a/drivers/staging/hv/vmbus_drv.c b/drivers/staging/hv/vmbus_drv.c
    index bf124a7..d597dd4 100644
    --- a/drivers/staging/hv/vmbus_drv.c
    +++ b/drivers/staging/hv/vmbus_drv.c
    @@ -622,30 +622,6 @@ cleanup:
    return ret;
    }

    -/*
    - * vmbus_bus_exit - Terminate the vmbus driver.
    - *
    - * This routine is opposite of vmbus_bus_init()
    - */
    -static void vmbus_bus_exit(void)
    -{
    -
    -
    - vmbus_release_unattached_channels();
    - vmbus_disconnect();
    - on_each_cpu(hv_synic_cleanup, NULL, 1);
    -
    - hv_cleanup();
    -
    - bus_unregister(&hv_bus.bus);
    -
    - free_irq(hv_pci_dev->irq, hv_pci_dev);
    -
    - tasklet_kill(&hv_bus.msg_dpc);
    - tasklet_kill(&hv_bus.event_dpc);
    -}
    -
    -
    /**
    * vmbus_child_driver_register() - Register a vmbus's child driver
    * @drv: Pointer to driver structure you want to register
    @@ -814,17 +790,9 @@ static int __init hv_pci_init(void)
    return pci_register_driver(&hv_bus_driver);
    }

    -static void __exit hv_pci_exit(void)
    -{
    - vmbus_bus_exit();
    - pci_unregister_driver(&hv_bus_driver);
    -}
    -
    -

    MODULE_LICENSE("GPL");
    MODULE_VERSION(HV_DRV_VERSION);
    module_param(vmbus_loglevel, int, S_IRUGO|S_IWUSR);

    module_init(hv_pci_init);
    -module_exit(hv_pci_exit);
    --
    1.7.4.1


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