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[ Upstream commit2745aea675] Some versions of iproute2 will output more than one line per entry, which will cause the test to fail, like: TEST: ipv6: list and flush cached exceptions [FAIL] can't list cached exceptions That happens, for example, with iproute2 4.15.0. When using the -oneline option, this will work just fine: TEST: ipv6: list and flush cached exceptions [ OK ] This also works just fine with a more recent version of iproute2, like 5.4.0. For some reason, two lines are printed for the IPv4 test no matter what version of iproute2 is used. Use the same -oneline parameter there instead of counting the lines twice. Fixes:b964641e99("selftests: pmtu: Make list_flush_ipv6_exception test more demanding") Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Acked-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>