net/mlx5: fix build on Arm

On some ARM environment, the below compilation error will be seen

dpdk/drivers/net/mlx5/mlx5_flow_dv.c: In function
'flow_dv_translate_item_nvgre':
/tmp/dpdk/drivers/net/mlx5/mlx5_flow_dv.c:785:22: error: pointer targets
in initialization differ in signedness [-Werror=pointer-sign]
  const char *tni_v = nvgre_v->tni;

The reason for this error is that nvgre_v->tni is defined as byte array
in size of 3B. However the code in the function iterate till the 4B in
order to copy/set also the subsequent field after it (flow_id)

Fixing by pointing to this struct from a different pointer.

Fixes: fc2c498ccb94 ("net/mlx5: add Direct Verbs translate items")

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Ori Kam <orika@mellanox.com>

diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index a013201..becbc57 100644 (file)
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -780,6 +780,8 @@ flow_dv_translate_item_nvgre(void *matcher, void *key,
        const struct rte_flow_item_nvgre *nvgre_v = item->spec;
        void *misc_m = MLX5_ADDR_OF(fte_match_param, matcher, misc_parameters);
        void *misc_v = MLX5_ADDR_OF(fte_match_param, key, misc_parameters);
+       const char *tni_flow_id_m = (const char *)nvgre_m->tni;
+       const char *tni_flow_id_v = (const char *)nvgre_v->tni;
        char *gre_key_m;
        char *gre_key_v;
        int size;
@@ -792,9 +794,9 @@ flow_dv_translate_item_nvgre(void *matcher, void *key,
        size = sizeof(nvgre_m->tni) + sizeof(nvgre_m->flow_id);
        gre_key_m = MLX5_ADDR_OF(fte_match_set_misc, misc_m, gre_key_h);
        gre_key_v = MLX5_ADDR_OF(fte_match_set_misc, misc_v, gre_key_h);
-       memcpy(gre_key_m, nvgre_m->tni, size);
+       memcpy(gre_key_m, tni_flow_id_m, size);
        for (i = 0; i < size; ++i)
-               gre_key_v[i] = gre_key_m[i] & ((const char *)(nvgre_v->tni))[i];
+               gre_key_v[i] = gre_key_m[i] & tni_flow_id_v[i];
        flow_dv_translate_item_gre(matcher, key, item, inner);
 }