[dpdk-dev] [PATCH] net/fm10k: fix RSS hash config

[Xiao Wang]

Sometimes app just wants to update the RSS hash function and no RSS key
update is needed, but fm10k pmd will return EINVAL for this case.

If the rss_key is NULL, we don't need to check the rss_key_len.

Fixes: 57033cdf8fdc ("fm10k: add PF RSS")

Reported-by: Xueqin Lin <xueqin.lin at intel.com>
Signed-off-by: Xiao Wang <xiao.w.wang at intel.com>
---
 drivers/net/fm10k/fm10k_ethdev.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/fm10k/fm10k_ethdev.c b/drivers/net/fm10k/fm10k_ethdev.c
index 144b2de..01f4a72 100644
--- a/drivers/net/fm10k/fm10k_ethdev.c
+++ b/drivers/net/fm10k/fm10k_ethdev.c
@@ -2159,8 +2159,8 @@ fm10k_rss_hash_update(struct rte_eth_dev *dev,
 
 	PMD_INIT_FUNC_TRACE();
 
-	if (rss_conf->rss_key_len < FM10K_RSSRK_SIZE *
-		FM10K_RSSRK_ENTRIES_PER_REG)
+	if (key && (rss_conf->rss_key_len < FM10K_RSSRK_SIZE *
+				FM10K_RSSRK_ENTRIES_PER_REG))
 		return -EINVAL;
 
 	if (hf == 0)
@@ -2202,8 +2202,8 @@ fm10k_rss_hash_conf_get(struct rte_eth_dev *dev,
 
 	PMD_INIT_FUNC_TRACE();
 
-	if (rss_conf->rss_key_len < FM10K_RSSRK_SIZE *
-				FM10K_RSSRK_ENTRIES_PER_REG)
+	if (key && (rss_conf->rss_key_len < FM10K_RSSRK_SIZE *
+				FM10K_RSSRK_ENTRIES_PER_REG))
 		return -EINVAL;
 
 	if (key != NULL)
-- 
1.9.3