myri10ge: fix potential infinite loop in enable_ecrc
Fix another potential for an infinite loop while looking for the root port in myri10ge_enable_ecrc(). Signed-off-by: NBrice Goglin <brice@myri.com> Signed-off-by: NAndrew Gallatin <gallatin@myri.com> Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
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