"Denis V. Lunev" <d...@openvz.org> writes: > From: Andrey Smetanin <asmeta...@virtuozzo.com> > > 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.
"to make sure it is safe to free previously allocated resources" (as we can free them anyway)? > > This patch does appropriate cleanup in case of vmbus_connect() failure. > > Signed-off-by: Andrey Smetanin <asmeta...@virtuozzo.com> > Signed-off-by: Denis V. Lunev <d...@openvz.org> > CC: "K. Y. Srinivasan" <k...@microsoft.com> > CC: Haiyang Zhang <haiya...@microsoft.com> > CC: Vitaly Kuznetsov <vkuzn...@redhat.com> Reviewed-by: Vitaly Kuznetsov <vkuzn...@redhat.com> > --- > drivers/hv/vmbus_drv.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c > index f19b6f7..3297731 100644 > --- a/drivers/hv/vmbus_drv.c > +++ b/drivers/hv/vmbus_drv.c > @@ -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(); -- Vitaly _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
