net/mlx5: fix build with gcc 7.1

build error:
.../dpdk/drivers/net/mlx5/mlx5_fdir.c:
  In function ‘fdir_filter_to_flow_desc’:
.../dpdk/drivers/net/mlx5/mlx5_fdir.c:146:18:
 error: this statement may fall through [-Werror=implicit-fallthrough=]
   desc->dst_port = fdir_filter->input.flow.udp4_flow.dst_port;
   ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.../dpdk/drivers/net/mlx5/mlx5_fdir.c:147:2: note: here
  case RTE_ETH_FLOW_NONFRAG_IPV4_OTHER:
  ^~~~

Fixed by adding fallthrough comment to the code.

Fixes: 76f5c99e6840 ("mlx5: support flow director")
Cc: stable@dpdk.org
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>

diff --git a/drivers/net/mlx5/mlx5_fdir.c b/drivers/net/mlx5/mlx5_fdir.c
index 1cff41b..c8d4748 100644 (file)
--- a/drivers/net/mlx5/mlx5_fdir.c
+++ b/drivers/net/mlx5/mlx5_fdir.c
@@ -144,6 +144,7 @@ fdir_filter_to_flow_desc(const struct rte_eth_fdir_filter *fdir_filter,
        case RTE_ETH_FLOW_NONFRAG_IPV4_TCP:
                desc->src_port = fdir_filter->input.flow.udp4_flow.src_port;
                desc->dst_port = fdir_filter->input.flow.udp4_flow.dst_port;
+               /* fallthrough */
        case RTE_ETH_FLOW_NONFRAG_IPV4_OTHER:
                desc->src_ip[0] = fdir_filter->input.flow.ip4_flow.src_ip;
                desc->dst_ip[0] = fdir_filter->input.flow.ip4_flow.dst_ip;