app/testpmd: fix help for loop topology option

The testpmd --help option did not show all possible choices for port
topology previously. The loop topology option is now added.

Fixes: 3e2006d6186c ("app/testpmd: add loopback topology")
Cc: stable@dpdk.org
Signed-off-by: Ciara Power <ciara.power@intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit@intel.com>

diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
index 5e55263..9ea87c1 100644 (file)
--- a/app/test-pmd/parameters.c
+++ b/app/test-pmd/parameters.c
@@ -139,8 +139,8 @@ usage(char* progname)
        printf("  --enable-hw-qinq-strip: enable hardware qinq strip.\n");
        printf("  --enable-drop-en: enable per queue packet drop.\n");
        printf("  --disable-rss: disable rss.\n");
-       printf("  --port-topology=N: set port topology (N: paired (default) or "
-              "chained).\n");
+       printf("  --port-topology=<paired|chained|loop>: set port topology (paired "
+              "is default).\n");
        printf("  --forward-mode=N: set forwarding mode (N: %s).\n",
               list_pkt_forwarding_modes());
        printf("  --rss-ip: set RSS functions to IPv4/IPv6 only .\n");