[dpdk-dev] [PATCH] kni: check code of allmulticast mode switch

["Min Hu (Connor)" <humin29@huawei.com>]

From: Chengwen Feng <fengchengwen@huawei.com>

Some drivers may return errcode when switch allmulticast mode, so it's
necessary to check the return code.

Fixes: b34801d1aa2e ("kni: support allmulticast mode set")
Cc: stable@dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 lib/kni/rte_kni.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/lib/kni/rte_kni.c b/lib/kni/rte_kni.c
index 9dae6a8..aa9b5b7 100644
--- a/lib/kni/rte_kni.c
+++ b/lib/kni/rte_kni.c
@@ -514,6 +514,8 @@ kni_config_promiscusity(uint16_t port_id, uint8_t to_on)
 static int
 kni_config_allmulticast(uint16_t port_id, uint8_t to_on)
 {
+	int ret;
+
 	if (!rte_eth_dev_is_valid_port(port_id)) {
 		RTE_LOG(ERR, KNI, "Invalid port id %d\n", port_id);
 		return -EINVAL;
@@ -523,11 +525,16 @@ kni_config_allmulticast(uint16_t port_id, uint8_t to_on)
 		port_id, to_on);
 
 	if (to_on)
-		rte_eth_allmulticast_enable(port_id);
+		ret = rte_eth_allmulticast_enable(port_id);
 	else
-		rte_eth_allmulticast_disable(port_id);
+		ret = rte_eth_allmulticast_disable(port_id);
+	if (ret != 0)
+		RTE_LOG(ERR, KNI,
+			"Failed to %s allmulticast mode for port %u: %s\n",
+			to_on ? "enable" : "disable", port_id,
+			rte_strerror(-ret));
 
-	return 0;
+	return ret;
 }
 
 int
-- 
2.7.4