irqbypass: do not start cons/prod when failed connect
If failed to connect, there is no need to start consumer nor producer. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Suggested-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200731065533.4144-7-lingshan.zhu@intel.comSigned-off-by: Michael S. Tsirkin <mst@redhat.com>
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