xen-netback: transition to CLOSED when removing a VIF
If a guest is destroyed without transitioning its frontend to CLOSED, the domain becomes a zombie as netback was not grant unmapping the shared rings. When removing a VIF, transition the backend to CLOSED so the VIF is disconnected if necessary (which will unmap the shared rings etc). This fixes a regression introduced by 279f438e (xen-netback: Don't destroy the netdev until the vif is shut down). Signed-off-by: NDavid Vrabel <david.vrabel@citrix.com> Cc: Ian Campbell <ian.campbell@citrix.com> Cc: Wei Liu <wei.liu2@citrix.com> Cc: Paul Durrant <Paul.Durrant@citrix.com> Acked-by: NWei Liu <wei.liu2@citrix.com> Reviewed-by: NPaul Durrant <paul.durrant@citrix.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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