i40e: fix reconfiguring hash enable flags

It fixes the issue of not re-configuring hash enable flags (HENA)
if there is no key.

Fixes: d0a349409bd7 ("i40e: support AQ based RSS config")

Signed-off-by: Helin Zhang <helin.zhang@intel.com>
Acked-by: Jingjing Wu <jingjing.wu@intel.com>

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 6cf99dc..684b2ec 100644 (file)
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -5672,9 +5672,14 @@ i40e_set_rss_key(struct i40e_vsi *vsi, uint8_t *key, uint8_t key_len)
        struct i40e_hw *hw = I40E_VSI_TO_HW(vsi);
        int ret = 0;
 
-       if (!key || key_len != ((I40E_PFQF_HKEY_MAX_INDEX + 1) *
-               sizeof(uint32_t)))
+       if (!key || key_len == 0) {
+               PMD_DRV_LOG(DEBUG, "No key to be configured");
+               return 0;
+       } else if (key_len != (I40E_PFQF_HKEY_MAX_INDEX + 1) *
+               sizeof(uint32_t)) {
+               PMD_DRV_LOG(ERR, "Invalid key length %u", key_len);
                return -EINVAL;
+       }
 
        if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) {
                struct i40e_aqc_get_set_rss_key_data *key_dw =