On 9/27/2016 3:53 PM, Nelio Laranjeiro wrote:
> Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro at 6wind.com>
<...>
> @@ -1286,12 +1291,13 @@ mlx5_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts,
> uint16_t pkts_n)
> &(*rxq->cqes)[rxq->cq_ci & cqe_cnt].cqe64;
> unsigned int i = 0;
> unsigned int rq_ci = rxq->rq_ci << sges_n;
> - int len;
>
> while (pkts_n) {
> unsigned int idx = rq_ci & wqe_cnt;
> volatile struct mlx5_wqe_data_seg *wqe = &(*rxq->wqes)[idx];
> struct rte_mbuf *rep = (*rxq->elts)[idx];
> + int len;
clang generates following warning, -it is quite detailed compiler message:
.../drivers/net/mlx5/mlx5_rxtx.c:1327:7: error: variable 'len' is used
uninitialized whenever 'if' condition is false
[-Werror,-Wsometimes-uninitialized]
if (!pkt) {
^~~~
.../drivers/net/mlx5/mlx5_rxtx.c:1384:7: note: uninitialized use occurs here
if (len > DATA_LEN(seg)) {
^~~
.../drivers/net/mlx5/mlx5_rxtx.c:1327:3: note: remove the 'if' if its
condition is always true
if (!pkt) {
^~~~~~~~~~
.../drivers/net/mlx5/mlx5_rxtx.c:1299:10: note: initialize the variable
'len' to silence this warning
int len;
^
= 0
