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drivers/hv: cleanup synic msrs if vmbus connect failed

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Before vmbus_connect() synic is setup per vcpu - this means
hypervisor receives writes at synic msr's and probably allocate
hypervisor resources per synic setup.

If vmbus_connect() failed for some reason it's neccessary to cleanup
synic setup by call hv_synic_cleanup() at each vcpu to get a chance
to free allocated resources by hypervisor per synic.

This patch does appropriate cleanup in case of vmbus_connect() failure.

Signed-off-by: Andrey Smetanin <[email protected]>
Signed-off-by: Denis V. Lunev <[email protected]>
Reviewed-by: Vitaly Kuznetsov <[email protected]>
CC: "K. Y. Srinivasan" <[email protected]>
CC: Haiyang Zhang <[email protected]>
CC: Vitaly Kuznetsov <[email protected]>
Signed-off-by: K. Y. Srinivasan <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Andrey Smetanin 2015-12-14 16:01:38 -08:00 • committed by Greg Kroah-Hartman
commit 17efbee8ba
1 changed files with 3 additions and 1 deletions
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4
drivers/hv/vmbus_drv.c
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@ -867,7 +867,7 @@ static int vmbus_bus_init(int irq)
on_each_cpu(hv_synic_init, NULL, 1);
ret = vmbus_connect();
if (ret)
goto err_alloc;
goto err_connect;
if (vmbus_proto_version > VERSION_WIN7)
cpu_hotplug_disable();
@ -885,6 +885,8 @@ static int vmbus_bus_init(int irq)
return 0;
err_connect:
on_each_cpu(hv_synic_cleanup, NULL, 1);
err_alloc:
hv_synic_free();
hv_remove_vmbus_irq();