[PATCH v2] examples/vhost: fix floating point exception when no VMDq

[Yuan Wang <yuanx.wang@intel.com>]

If the VMDQ limits is 0, a divide-by-zero error occurs.
This patch replaces throwing a floating point exception with
a normal error message.

Fixes: d19533e86f ("examples/vhost: copy old vhost example")
Cc: stable@dpdk.org

Signed-off-by: Yuan Wang <yuanx.wang@intel.com>
---
 examples/vhost/main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/examples/vhost/main.c b/examples/vhost/main.c
index c4d46de1c5..48d9f3802f 100644
--- a/examples/vhost/main.c
+++ b/examples/vhost/main.c
@@ -400,6 +400,10 @@ port_init(uint16_t port)
 
 		return retval;
 	}
+	if (dev_info.max_vmdq_pools == 0) {
+		RTE_LOG(ERR, VHOST_PORT, "Failed to get VMDQ info.\n");
+		return -1;
+	}
 
 	rxconf = &dev_info.default_rxconf;
 	txconf = &dev_info.default_txconf;
-- 
2.25.1