If the device is not clearly reset by the previous driver and holds
some invalid ring addr, and the relay thread kicks it before HW is
properly re-configured, a bad DMA request may happen.
Besides, the notify_addr which is used by the relay thread is set in
the vdpa_ifcvf_start function, if a kick relay happens before
vdpa_ifcvf_start finishes, a null addr is accessed.
Fixes: a3f8150eac6d ("net/ifcvf: add ifcvf vDPA driver")
Cc: stable@dpdk.org
Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Reviewed-by: Xiaolong Ye <xiaolong.ye@intel.com>
971c19c77c