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Drivers: hv: Make the vmbus driver unloadable

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It turns out that the vmbus driver can be made unloadable. Make it
unloadable.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
K. Y. Srinivasan 2011-12-12 09:29:17 -08:00 committed by Greg Kroah-Hartman
parent 8b8ee67531
commit 93e5bd06a9
4 changed files with 26 additions and 0 deletions
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11
drivers/hv/channel_mgmt.c
View File

@ -223,6 +223,17 @@ static void vmbus_process_rescind_offer(struct work_struct *work)
vmbus_device_unregister(channel->device_obj);
}
void vmbus_free_channels(void)
{
struct vmbus_channel *channel;
list_for_each_entry(channel, &vmbus_connection.chn_list, listentry) {
vmbus_device_unregister(channel->device_obj);
kfree(channel->device_obj);
free_channel(channel);
}
}
/*
* vmbus_process_offer - Process the offer by creating a channel/device
* associated with this offer

3
drivers/hv/hv.c
View File

@ -237,6 +237,9 @@ void hv_cleanup(void)
{
union hv_x64_msr_hypercall_contents hypercall_msr;
/* Reset our OS id */
wrmsrl(HV_X64_MSR_GUEST_OS_ID, 0);
kfree(hv_context.signal_event_buffer);
hv_context.signal_event_buffer = NULL;
hv_context.signal_event_param = NULL;

1
drivers/hv/hyperv_vmbus.h
View File

@ -611,6 +611,7 @@ void vmbus_device_unregister(struct hv_device *device_obj);
struct vmbus_channel *relid2channel(u32 relid);
void vmbus_free_channels(void);
/* Connection interface */

11
drivers/hv/vmbus_drv.c
View File

@ -795,8 +795,19 @@ cleanup:
return ret;
}
static void __exit vmbus_exit(void)
{
free_irq(irq, hv_acpi_dev);
vmbus_free_channels();
bus_unregister(&hv_bus);
hv_cleanup();
acpi_bus_unregister_driver(&vmbus_acpi_driver);
}
MODULE_LICENSE("GPL");
MODULE_VERSION(HV_DRV_VERSION);
subsys_initcall(hv_acpi_init);
module_exit(vmbus_exit);