net:dsa: check for EPROBE_DEFER from dsa_dst_parse()
Since there can be multiple dsa switches stacked together but not all of devicetree nodes available at the time of calling dsa_dst_parse(), EPROBE_DEFER can be returned by it. When this happens, only the last dsa switch has to be deleted by dsa_dst_del_ds(), but not the whole list, because next time linux cames back to this function it will try to add only the last dsa switch which returned EPROBE_DEFER. Signed-off-by: NVolodymyr Bendiuga <volodymyr.bendiuga@gmail.com> Reviewed-by: NAndrew Lunn <andrew@lunn.ch> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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