On 12/21/2018 1:01 PM, Qiming Yang wrote:
> I40e do not allow to get rss hena only, need to get rss
> key meanwhile.
i40e_get_rss_key() returns error if 'rss_conf.rss_key' is NULL, this patch is
fixing the error case.
But instead of fixing this in application level, it can be better to fix in
driver level. Because 'rte_eth_dev_rss_hash_conf_get()' API doesn't dictate
'rss_conf.rss_key' to be not NULL, so any other application can cause same
problem.
Possible solution can be to have an interim 'key' buffer in
'i40e_dev_rss_hash_conf_get()' and copy it to 'rss_conf.rss_key' if it is not
NULL.
>
> Fixes: 16321de09396 ("ethdev: allow to get RSS hash functions and key")
> Cc: sta...@dpdk.org
>
> Signed-off-by: Qiming Yang <qiming.y...@intel.com>
> ---
> app/test-pmd/config.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
> index b9e5dd9..482c4f5 100644
> --- a/app/test-pmd/config.c
> +++ b/app/test-pmd/config.c
> @@ -1764,8 +1764,7 @@ port_rss_hash_conf_show(portid_t port_id, int
> show_rss_key)
> return;
> }
>
> - /* Get RSS hash key if asked to display it */
> - rss_conf.rss_key = (show_rss_key) ? rss_key : NULL;
> + rss_conf.rss_key = rss_key;
> rss_conf.rss_key_len = hash_key_size;
> diag = rte_eth_dev_rss_hash_conf_get(port_id, &rss_conf);
> if (diag != 0) {
> @@ -1793,6 +1792,8 @@ port_rss_hash_conf_show(portid_t port_id, int
> show_rss_key)
> printf("%s ", rss_type_table[i].str);
> }
> printf("\n");
> +
> + /* Get RSS hash key if asked to display it */
> if (!show_rss_key)
> return;
> printf("RSS key:\n");
>
